|
|
Channelized T1 and channelized E1 can be configured for ISDN PRI, synchronous serial, and asynchronous serial communications.
Channelized T1 and channelized E1 are supported by corresponding controllers. Each T1 or E1 controller has one physical network termination, but it can have many virtual interfaces, depending on the configuration.
This chapter describes how to configure channelized E1 and channelized T1 for ISDN PRI and for two types of signaling to support analog calls over digital lines. The following main configuration sections are provided:
In addition, this chapter describes how to run interface loopback diagnostics on channelized E1 and channelized T1. For more information, see the "Troubleshoot Channelized E1 and Channelized T1" section.
For hardware technical descriptions, and for information about installing the controllers and interfaces, refer to the hardware installation and maintenance publication for your particular product.
For a complete description of the channelized E1/T1 commands in this chapter, refer to the Dial Solutions Command Reference. To locate documentation of other commands that appear in this chapter, use the command reference master index or search online.
This section presents background information about signaling and about the use of channelized E1/T1 on the Cisco AS5200.
The terms in-band and out-of-band indicate whether various signals---used to set up, control, and terminate calls---travel in the same channel (or band) with users' voice calls or data, or whether those signals travel a separate channel (or band).
ISDN, which uses the D channel for signaling and the B channels for user data, fits into the out-of-band signaling category.
Robbed-bit signaling, which uses bits from specified frames in the user data channel for signaling, fits into the in-band signaling category.
Channel-associated signaling, which uses E1 timeslot 16 (the D channel) for signaling, fits into the out-of-band signaling category.
On a Cisco AS5200, you can allocate the available channels for channelized E1 or T1 in the following ways:
See the "PRI Groups and Channel Groups on the Same Channelized T1 Controller Example," "Robbed-Bit Signaling Examples," and the "ISDN Channel-Associated Signaling Examples" sections at the end of this chapter.
This section describes tasks that are required to get ISDN PRI up and running. This section does not address routing issues, dialer configuration, and dial backup. For information about those topics, see the "Dial-on-Demand Routing" part of this manual.
ISDN PRI is supported on the Cisco 7200 series and 7500 series routers using T1 or E1 versions of the Multichannel Interface Processor (MIP) card, on the Cisco 4000 series channelized E1/T1/PRI network processor module (NPM), and on the Cisco AS5200. Channelized T1 ISDN PRI offers 23 B channels and 1 D channel. Channelized E1 ISDN PRI offers 30 B channels and 1 D channel. Channel 24 is the D channel for T1, and channel 16 is the D channel for E1.
For a complete description of the commands mentioned in this chapter, refer to the Dial Solutions Command Reference.
Perform the tasks in the following sections to configure ISDN PRI:
See the end of this chapter for the "ISDN PRI Examples" section.
For DDR configuration information, see the "Dial-on-Demand Routing" part of this manual. For command information, refer to the Dial Solutions Command Reference.
This process varies dramatically from provider to provider on a national and international basis. However, some general guidelines follow:
When you order ISDN service, request the PRI switch configuration attributes displayed in Table 13.
| Attribute | Value |
|---|---|
Line format | Extended Superframe Format (ESF) |
Line coding | Binary 8-zero substitution (B8ZS) |
Call type | 23 incoming channels and 23 outgoing channels |
Speed | 64 kbps |
Call-by-call capability | Enabled |
Channels | 23 B+D |
Trunk selection sequence | Either ascending order (from 1 to 23) or descending order (from 23 to 1) |
B + D glare | Yield |
Directory numbers | Only 1 directory number assigned by service provider |
ISDN call speed outside local exchange | Speed set to 56 kbps outside local exchange |
SPIDs required? | None |
| Step | Command | Purpose | ||
|---|---|---|---|---|
| Select a service provider switch type that accommodates PRI. (See Table 14 for a list of supported switch type keywords.) | |||
| controller e1 slot/port | Define the controller location in the Cisco7200 or Cisco 7500 series by slot and port number. | ||
| framing crc4 | Define the framing characteristics as cyclic redundancy check 4 (CRC4). | ||
| Define the line code as high-density bipolar 3 (HDB3). | |||
| pri-group [timeslots range] | Configure ISDN PRI. |
| 1Controller numbers range 0 through 2 on the Cisco 4000 series and 1 to 2 on the Cisco AS5200. |
| Keywords by Area | Switch Type |
none | No switch defined |
| Australia |
|
primary-ts014 | Australia PRI switches |
| Europe | |
primary-net5 | European, New Zealand and Asia ISDN PRI switches (covers the Euro-ISDN E-DSS1 signaling system and is ETSI-compliant) |
| Japan | |
primary-ntt | Japanese ISDN PRI switches |
| North America | |
primary-4ess | AT&T 4ESS switch type for the U.S. |
primary-5ess | AT&T 5ESS switch type for the U.S. |
primary-dms100 | NT DMS-100 switch type for the U.S. |
primary-ni | AT&T National ISDN switch type |
| Step | Command | Purpose |
|---|---|---|
Step 1 | Select a service provider switch type that accommodates PRI. (See Table 14 for a list of supported PRI switch type keywords.) | |
Step 2 | controller t1 slot/port | Specify a T1 controller on a Cisco 7500 |
Step 3 | framing esf | Define the framing characteristics as Extended Superframe Format (ESF). |
Step 4 | Define the line code as binary 8 zero substitution (B8ZS). | |
Step 5 | Configure ISDN PRI. If you do not specify the time slots, this controller is configured for 23 B channels and 1 D channel. |
When you configure ISDN PRI on the channelized E1 or channelized T1 controller, in effect you create a serial interface that corresponds to the PRI group timeslots This interface is a logical entity is associated with the specific controller. After you create the serial interface by configuring the controller, you must configure the D channel serial interface. The configuration applies to all the PRI B channels (timeslots).
To configure the D channel serial interface, complete the tasks in the following sections:
To configure the D channel serial interface created for ISDN PRI, use the following commands beginning in global configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| interface serial slot/port:23 | Specify D channel on the serial interface for channelized T1. | ||
| ip address ip-address | Specify an IP address for the interface. |
When you configure the D channel, its configuration is applied to all the individual B channels.
PPP encapsulation is configured for most ISDN communication. However, the router might require a different encapsulation for traffic sent over a Frame Relay or X.25 network, or the router might need to communicate with devices that require a different encapsulation protocol.
Configure encapsulation as described in one of the following sections:
In addition, the router can be configured for automatic detection of encapsulation type on incoming calls. To configure this feature, complete the tasks in the following section:
| Command | Purpose |
|---|---|
encapsulation ppp | Configure PPP encapsulation. |
See the "Configuring Frame Relay" chapter or "Configuring X.25 and LAPB" chapter for more information about addressing, encapsulation, and other tasks necessary to configure Frame Relay or X.25 networks.
Historically, Combinet devices supported only the Combinet Proprietary Protocol (CPP) for negotiating connections over ISDN B channels. To enable Cisco routers to communicate with those Combinet bridges, the Cisco IOS software supports a new CPP encapsulation type.
To enable routers to communicate over ISDN interfaces with Combinet bridges that support only CPP, use the following commands in interface configuration mode:
| Step | Command | Purpose |
|---|---|---|
Step 1 | encapsulation cpp | Specify CPP encapsulation. |
Step 2 | cpp callback accept | Enable CPP callback acceptance. |
Step 3 | cpp authentication | Enable CPP authentication. |
Now most Combinet devices support PPP. Cisco routers can communicate over ISDN with these devices by using PPP encapsulation, which supports both routing and fast switching.
Combinet devices support only IP, IPX, and bridging. For AppleTalk, Cisco routers automatically perform half-bridging with Combinet devices. For more information about half-bridging, see the "Configure PPP Half-Bridging" section in the "Configuring Media-Independent PPP" chapter of this publication.
Cisco routers can also half-bridge IP and IPX with Combinet devices that support only CPP. To configure this feature, you only need to set up the addressing with the ISDN interface as part of the remote subnet; no additional commands are required.
You can enable a serial or ISDN interface to accept calls and dynamically change the encapsulation in effect on the interface when the remote device does not signal the call type. For example, if an ISDN call does not identify the call type in the Lower Layer Compatibility fields and is using an encapsulation that is different from the one configured on the interface, the interface can change its encapsulation type at that time.
This feature enables interoperation with ISDN terminal adapters that use V.120 encapsulation but do not signal V.120 in the call setup message. An ISDN interface that by default answers a call as synchronous serial with PPP encapsulation can change its encapsulation and answer such calls.
Automatic detection is attempted for the first 10 seconds after the link is established or the first five packets exchanged over the link, whichever is first.
To enable automatic detection of encapsulation type, use the following commands in interface configuration mode:
| Command | Purpose |
|---|---|
autodetect encapsulation encapsulation-type | Enable automatic detection of encapsulation type on the specified interface. |
You can specify one or more encapsulations to detect. Cisco IOS software currently supports automatic detection of PPP and V.120 encapsulations.
When you configure networking, you specify how to reach the remote recipient. To configure network addressing, use the following commands beginning in interface configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| dialer map protocol next-hop-address name hostname speed 56|64 dial-string[:isdn-subaddress] dialer map protocol next-hop-address name hostname spc [speed 56 | 64] [broadcast] dial-string[:isdn-subaddress] | Define the remote recipient's protocol address, host name, and dialing string; optionally, provide the ISDN subaddress; set the dialer speed to 56 or 64 kbps, as needed. | ||
| dialer-group group-number | Assign the interface to a dialer group to control access to the interface. | ||
| dialer-list dialer-group list access-list-number | Associate the dialer group number with an access list number. | ||
| access-list access-list-number {deny | permit} protocol source address source-mask destination destination-mask | Define an access list permitting or denying access to specified protocols, sources, or destinations. |
Australian networks allow semipermanent connections between customer routers with PRIs and the TS-014 ISDN PRI switches in the exchange. Semipermanent connections are offered at better pricing than leased lines.
Packets that are permitted by the access list specified in are considered interesting and cause the router to place a call to the destination protocol address that is identified in both and .
For more information about defining outgoing call numbers, see the "Configuring Legacy DDR" or "Configuring Dialer Profiles" chapter.
A router might need to supply the ISDN network with a billing number for outgoing calls. Some networks offer better pricing on calls in which the number is presented. When configured, the calling number information is included in the outgoing Setup message.
To configure the interface to identify the billing number, use the following commands in interface configuration mode:
| Command | Purpose |
|---|---|
isdn calling-number calling-number | Specify the calling party number. |
This command can be used with all ISDN PRI switch types.
| Command | Purpose |
|---|---|
Route incoming ISDN modem calls to the modem module. |
In some geographic locations, such as Hong Kong and Taiwan, ISDN switches require that the Sending Complete information element be included in the outgoing Setup message to indicate that the entire number is included. This information element is not required in other locations.
To configure the interface to include the Sending Complete information element in the outgoing call Setup message, use the following command in interface configuration mode:
| Command | Purpose |
|---|---|
Include the Sending Complete information element in the outgoing call Setup message. |
Network-Specific Facilities (NSF) are used to request a particular service from the network or to provide an indication of the service being provided. Call-by-call support means that a B channel can be used for any service; its use is not restricted to a certain preconfigured service, such as incoming 800 calls or an outgoing 800 calls. This specific NSF call-by-call service supports outgoing calls configured as voice calls.
To enable the router to for NSF call-by-call support and, optionally, to place outgoing voice calls, complete use the following steps:
Step 1 Configure the controller for ISDN PRI.
Step 2 Configure the D channel interface to place outgoing calls, using the dialer map command with a dialing-plan keyword. You can enter a dialer map command for each dialing plan to be supported.
Step 3 Define the dialer map class for that dialing plan.
| Step | Command | Purpose | ||
|---|---|---|---|---|
| map-class dialer classname | Specify the dialer map class, using the dialing-plan keyword as the classname. | ||
| dialer voice-call | (Optional) Enable voice calls. | ||
| dialer outgoing classname | Configure the specific dialer map class to make outgoing calls. |
Table 15 lists the NSF dialing plans and supported services offered on AT&T Primary-4ESS switches.
| NSF Dialing Plan | Data | Voice | International |
|---|---|---|---|
Software Defined Network (SDN)1 | Yes | Yes | GSDN (Global SDN) |
MEGACOMM | No | Yes | Yes |
ACCUNET | Yes | Yes | Yes |
| 1The dialing plan terminology in this table is defined and used by AT&T. |
The Multiple ISDN Switch Types feature allows you to configure more than one ISDN switch type per router. You can apply an ISDN switch type on a per interface basis, thus extending the existing global isdn switch-type command to the interface level. This allows Primary Rate Interfaces (PRI) and Basic Rate Interfaces (BRI) and to run simultaneously on platforms that support both interface types.
A global ISDN switch type is required and must be configured on the router before you can configure a switch type on an interface. To configure multiple ISDN switch types for a PRI interface using a channelized E1 or channelized T1 controller, use the following command in global configuration mode:
| Command | Purpose |
|---|---|
isdn switch-type switch-type | Apply a global ISDN switch type. |
You must ensure the ISDN switch type is valid for the ISDN interfaces on the router. Table 14 lists valid ISDN switch types for BRI and PRI interfaces.
The following restrictions apply to Multiple ISDN Switch Types:
| Global Switch Type | BRI Interface | PRI Interface |
|---|---|---|
basic-net3 | basic-net3 | primary-net5 |
primary-ts014 | basic-ts013 | primary-ts014 |
primary-ni | basic-ni | primary-ni |
If, for example, you reconfigure the router to use global switch type basic-net3, the router will apply a primary-net5 switch type to PRI interfaces and basic-net3 to any BRI interfaces. You can override the default switch assignment by configuring a different ISDN switch type on the associated interface.
You can configure the router to select the first available B channel in ascending order (channel B1) or descending order (channel B23 for a T1 and channel B30 for an E1). To configure the optional task of selecting B channel order for outgoing calls for PRI interface types, use the following command in interface configuration mode:
| Command | Purpose |
|---|---|
isdn bchan-number-order {ascending | descending} | Enable B channel selection for outgoing calls on a PRI interface (optional). |
Before configuring the ISDN PRI on your router, check with your service vendor to determine if the ISDN trunk call selection is configured for ascending or descending order. If there is a mismatch between the router and switch with regard to channel availability, the switch will send back an error message stating the channel is not available. By default, the router will select outgoing calls in descending order.
To test the router's ISDN configuration, we suggest that you use the following commands:
| Command | Purpose |
|---|---|
Check Layer 1 (physical layer) of the PRI over T1. | |
Check Layer 1 (physical layer) of the PRI over E1. | |
Check Layer 2 (data link layer). | |
Check Layer 3 (network layer). |
See the Debug Command Reference for information about the debug commands.
Use the following commands to monitor and maintain ISDN interfaces:
| Command | Purpose |
|---|---|
show interfaces serial slot/port bchannel channel-number (Cisco 7500 series) | Display information about the physical attributes of the ISDN PRI over T1 B and D channels. |
show interfaces serial slot/port bchannel channel-number (Cisco 7500 series) show interfaces serial number bchannel channel-number (Cisco 4000 series) | Display information about the physical attributes of the ISDN PRI over E1 B and D channels. |
show controllers t1 [slot/port] (Cisco 7500 series) show controllers t1 number (Cisco 4000 series) | Display information about the T1 links supported on the ISDN PRI B and D channels. |
show controllers e1 [slot/port] (Cisco 7500 series) show controllers e1 number (Cisco 4000 series) | Display information about the E1 links supported on the ISDN PRI B and D channels. |
show isdn {active | history | memory | services | status [dsl | serial number] | timers} | Display information about current calls, history, memory, services, status of PRI channels, or Layer 2 or Layer 3 timers. (The service keyword is available for PRI only.) |
show dialer [interface type number] | Obtain general diagnostic information about the specified interface. |
In countries that support T1 framing (such as the United States and Canada), many networks send supervisory and signaling information to each other by removing the 8th bit of each timeslot of the 6th and 12th frame for superframe (SF) framing. For networks supporting extended superframe (ESF) framing, the 6th, 12th, 18th, and 24th frames are affected. This is done to support channel banks in the network that convert various battery and ground operations on analog lines into signaling bits the Robbed-bits are forwarded over digital lines.
Robbed-bit signaling configured on the Cisco AS5200 enables the integrated modems in the access server to answer and transmit analog calls. To support analog signaling over T1 lines on the Cisco AS5200, robbed-bit signaling must be enabled.
The Cisco AS5200 has two controllers: controller T1 1 and controller T1 0, which must be configured individually.
To configure robbed-bit signaling support for calls made and received, use the following commands beginning in global configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| controller t1 0 | Enable the T1 0 controller, and enter controller configuration mode. | ||
| cablelength long dbgain-value dbloss-value | If the channelized T1 line connects to a smart jack instead of a CSU, set pulse equalization (use parameter values specified by your telco service provider). | ||
| framing esf | Set the framing to match your telco service provider's offering, which in most cases is esf. | ||
| linecode b8zs | Set the line code type to match your telco service provider's offering, which in most cases is b8zs. | ||
| clock source line primary | Configure one T1 line to serve as the primary or most stable clock source line. | ||
| cas-group channel-number timeslots range type signal | Configure channels to accept voice calls. This step creates interfaces that you can configure. | ||
| fdl {att | ansi} | Set the facilities data link exchange standard for the CSU, as specified by your telco service provider. |
If you want to configure robbed-bit signaling on the other T1 controller, repeat Steps 1 through 7, making sure in Step 5 to select T1 controller 1's line as the secondary clock source.
If you want to configure ISDN on the other controller, see the "Configure ISDN PRI" section of this chapter. If you want to configure channel groupings on the other controller, see the "Configuring Synchronous Serial Ports" chapter in this manual; specify the channel groupings when you specify the interface.
The Cisco AS5200 and AS5300 Universal Access Servers supports channel-associated signaling for channelized E1 lines, which are commonly deployed in networks in Latin America, Asia, and Europe. Channel-associated signaling is configured to support channel banks in the network that convert various battery and ground operations on analog lines into signaling bits, which are forwarded over digital lines.
Once channel-associated signaling is configured on a single E1 controller, up to 30 remote users can simultaneously dial in to the Cisco AS5200 and Cisco AS5300 through networks running the R2 protocol. The R2 protocol is an international signaling standard for analog connections. Because R2 signaling is not supported in the Cisco AS5200 and Cisco AS5300, an E1-to-E1 converter is required. See Figure 38.
Because the Cisco AS5200 and Cisco AS5300 have more than one physical E1 port on the dual E1 PRI board, up to 60 simultaneous connections can be made through one dual E1 PRI board.
To configure the Cisco AS5200's E1 controllers, use the following commands, beginning in global configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| controller e1 number | Define the controller location in the Cisco AS5200/AS5300 by unit number, ranging from 1 to 2. | ||
| cas-group channel-number timeslots range type signal | Configure channel-associated signaling and the R2 signaling protocol on a specified number of timeslots. | ||
| framing crc4 | Define the framing characteristics as cyclic redundancy check 4 (CRC4). | ||
| Define the line code as high-density bipolar 3 (HDB3). | |||
| Specify one E1 line to serve as the primary or most stable clock source line. |
| 1Specify the other E1 line as the secondary clock source with the clock source line secondary command. |
If you do not specify the time slots, channel-associated signaling is configured on all 30 B channels and one D channel on the specified controller.
If the problem is with a single channel group, you have a potential interface problem.
If the problem is with the T1 or E1 line, or with all channel groups, you have a potential controller problem.
The following sections describe how to determine whether the problem affects an interface or a controller:
When you troubleshoot E1 or T1 controllers, first check that the configuration is correct. The framing type and line code should match to what the service provider has specified. Then check channel group and PRI-group configurations, especially to verify that the timeslots and speeds are what the service provider has specified.
At this point, the show controller t1 or show controller e1 commands should be used to check for T1 or E1 errors. Use the command several times to determine if error counters are increasing, or if the line status is continually changing. If this is occurring, you need to work with the service provider.
Controller loopback tests are a means to isolate problems and are available for both channelized T1 controllers and channelized E1 controllers. The following loopback tests are documented for isolating T1 and E1 controller issues:
All channel groups will be looped back; if the encapsulation on that channel group supports loopbacks (for example, HDLC and PPP), you can test that channel group by pinging the interface address. For example, if you have assigned an IP address to the serial interface defined for a channel group, you can ping that IP address.
To place the controller into local loopback, use the following command in controller configuration mode.
| Command | Purpose |
|---|---|
loopback local (controller) | Loop the T1 controller toward the router and toward the line. |
To test a channel group, use the following command in EXEC mode:
| Command | Purpose |
ping protocol protocol-address | Ping the interface address. |
Check errors by using the following command in EXEC mode:
| Command | Purpose |
Check errors. |
If any errors occur, or the controller fails to change to the UP state, please contact the Cisco Technical Assistance Center (TAC).
The second T1 controller loopback is a remote loopback. This loopback can be used only if the entire T1 goes to a remote CSU. This is not the case with 99.9% of channelized T1. When the loopback remote controller command is executed, an inband CSU loop-up code will be sent over the entire T1, which will attempt to loop up the remote CSU. To place the controller in remote loopback, use the following command in controller configuration mode:
| Command | Purpose |
|---|---|
loopback remote (controller) | Place the T1 controller in remote loopback. |
For the E1 controller, only the local loopback is available. Local loopback operates the same as the local loopback on the T1 controller, forming a bidirectional loopback, both toward the router and toward the line. To place the E1 controller in local loopback, use the following command in controller configuration mode:
| Command | Purpose |
|---|---|
loopback (controller) | Place the E1 controller in local loopback toward the router and toward the line. |
All channel groups will be looped back; if the encapsulation on that channel group supports loopbacks (for example, HDLC and PPP), you can test that channel group by pinging the interface address. For example, if you have assigned an IP address to the serial interface defined for a channel group, you can ping that IP address.
To place the controller into local loopback, use the following command in controller configuration mode.
| Command | Purpose |
|---|---|
loopback local (controller) | Loop the T1 controller toward the router and toward the line. |
To test a channel group, use the following command in EXEC mode:
| Command | Purpose |
ping protocol protocol-address | Ping the interface address. |
Check errors if any. by using the following command in EXEC mode:
| Command | Purpose |
Check errors. |
If any errors occur, it is most likely a hardware problem; please contact the Cisco TAC. In addition, you can ask the service provider to test the line by using a T1 BERT test set.
Two loopbacks are available for channel groups:
To place the serial interface (channel group) into local loopback, use the following command in interface configuration mode:
| Command | Purpose |
|---|---|
loopback local | Place the serial interface (channel group) in local loopback. |
Remote loopback is the ability to put the remote DDS CSU/DSU in loopback. It will work only with channel groups that have a single DS0 (1 timeslot), and with equipment that works with a latched CSU loopback as specified in AT&T specification TR-TSY-000476, "OTGR Network Maintenance Access and Testing." To place the serial interface (channel group) in remote loopback, use the following command in interface configuration mode:
| Command | Purpose |
|---|---|
loopback remote (interface) | Place the serial interface (channel group) in remote loopback. |
Likewise, an enterprise can provide switched 56 kbps digital dial-in services to its full time telecommuters or small remote offices using ISDN PRI or a CT1 RBS connection.
Switched 56k digital dial-in offers the following benefits:
The following prerequisites apply to the Switched 56k Digital Dial-In feature:
The following apply to Switched 56k digital dial-in:
The following scenario descriptions are provided, which show multiple applications for supporting switched 56k over T1 CAS:
Figure 39 shows a sample network scenario using switched 56k. Two remote PCs are dialing in to the same Cisco AS5300 to get access to the Internet. The desktop PC is making switched 56k digital calls through an external CSU/DSU. The laptop PC is making analog modem calls through a 28.8 kbps modem. The Cisco AS5300 dynamically assigns IP addresses to each node and forwards data packets off to the switched 56k channels and onboard modems respectively.
For configuration examples, see the "Comprehensive Switched 56k Startup Configuration Example" at the end of this chapter.
Figure 40 shows the basic components that process switched 56k calls and analog modem calls on board a Cisco AS5200 and AS5300. Switched 56k and modem calls are signaling using robbed-bit signaling. Digital switched 56k calls utilize logical serial interfaces just like in ISDN PRI. Modem calls utilize asynchronous interfaces, lines, and modems.
Figure 41 shows how switched 56k functionality can be used to forward ISDN BRI network traffic to a Cisco AS5300, which is configured for switched 56k robbed-bit signaling over CT1.
For a configuration example on the Cisco AS5300, see the "Comprehensive Switched 56k Startup Configuration Example" section in the end of this chapter.
Figure 42 shows a sample network scenario using switched 56k. Two remote PCs are dialing in to the same Cisco AS5300 to get access to the Internet. The desktop PC is making switched 56k digital calls through an external CSU/DSU. The laptop PC is making analog modem calls through a 28.8 kbps modem. The Cisco AS5300 dynamically assigns IP addresses to each node and forwards data packets off to the switched 56k channels and onboard modems respectively.
For the startup running configuration on the Cisco AS5300 shown in Figure 42, see the section in "Comprehensive Switched 56k Startup Configuration Example" in this chapter.
This section describes how to configure switched 56k services on an access server. After the cas-group command is enabled for switched 56k services, a logical serial interface is automatically created for each 56k channel, which must also be configured.
To configure an access server to support switched 56k digital calls, use the following commands beginning in Privileged EXEC mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| Enter global configuration mode. | |||
| controllers t1 number | Specify a T1 controller. | ||
| framing {sf | esf} | Set the framing. | ||
| linecode {ami | b8zs} | Define the line code. | ||
| clock source {line {primary | secondary} | internal} | Specify the clocking. | ||
| cas-group channel timeslots range type signal | Configure robbed-bit signaling for a range of timeslots. A logical serial interface is automatically created for each switched 56k channel. | ||
| Exit controller configuration mode. | |||
| interface serial number:number | Specify logical serial interface, which was dynamically created when the cas-group is issued and configure the core protocol characteristics for the serial interface. |
For configuration examples, see the "Switched 56k Configuration Examples" section in this chapter.
R2 signaling is an international signaling standard that is common to channelized E1 networks. However, there is no single signaling standard for R2. The ITU-T Q.400-Q.490 recommendation defines R2, but a number of countries and geographic regions implement R2 in entirely different ways. Cisco Systems addresses this challenge by supporting many localized implementations of R2 signaling in its Cisco IOS software.
The following sections offer pertinent information about the E1 R2 signaling feature:
Cisco System's E1 R2 signaling default is ITU, which supports the following countries: Denmark, Finland, Germany, Russia (ITU variant), Hong Kong (ITU variant), and South Africa (ITU variant). The expression "ITU variant" means there are multiple R2 signaling types in the specified country, but Cisco supports the ITU variant.
Cisco Systems also supports specific local variants of E1 R2 signaling in the following regions, countries, and corporations:
The following are benefits of E1 R2 signaling:
Figure 43 shows a sample network topology for using E1 R2 signaling with a Cisco AS5300. All four controllers on the access server are configured with R2 digital signaling. Additionally, localized R2 country settings are enabled on the access server.
Configuration examples are supplied in the "Channelized E1 and Channelized T1 Configuration Examples" at the end of this chapter.
R2 signaling is channelized E1 signaling used in Europe, Asia, and South America. It is equivalent to channelized T1 signaling in North America. There are two types of R2 signaling: line signaling and interregister signaling. R2 line signaling includes R2 digital, R2 analog, and R2 pulse. R2 interregister signaling includes R2 compelled, R2 non compelled, and R2 semi compelled. These signaling types are configured using the cas-group (controller e1) command.
Many countries and regions have their own E1 R2 variant specifications, which supplement the ITU-T Q.400-Q.490 recommendation for R2 signaling. Unique E1 R2 signaling parameters for specific countries and regions are set by issuing the cas-custom channel command followed by the country name command.
Cisco's implementation of R2 signaling has DNIS support turned on by default. If you enable the ani option, the collection of DNIS information is still performed. Specifying the ani option does not disable DNIS collection. DNIS is the number being called. ANI is the caller's number. For example, if you are configuring router A to call router B, then the DNIS number is assigned to router B, the ANI number is assigned to router A. ANI is similar to Caller ID.
To configure support for E1 R2 signaling, use the commands in the following table beginning in global configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| controller e1 number | Specify the E1 controller that you want to configure with R2 signaling. | ||
| cas-group channel timeslots range type signal
Replace the signal variable with any of the following choices under R2 analog, R2 digital, or R2 pulse. or
or
| Configure R2 channel associated signaling on the E1 controller. For a complete description of the available R2 options, see the cas-group (controller e1) command. The R2 part of this command is defined by the signal variable in the cas-group (controller e1) command. | ||
| cas-custom channel | Enter cas-custom mode, which enables you to localize some of the E1 R2 signaling parameters, such as a specific R2 country settings for Hong Kong. For the customizing to take effect, the channel number used in the cas-custom command must match the channel number specified by the cas-group command. | ||
| country name use-defaults | Specify the local country, region, or corporation specification to use with R2 signaling. Replace the name variable with one of the supported country names. Cisco strongly recommends that you include the use-defaults option, which enables the default settings for a specific country. The default country setting is ITU. See the cas-custom command in the Dial Solutions Command Reference for the list of supported countries, regions, and corporation specifications. | ||
|
| (Optional) Further customize the R2 signaling parameters. Some switch types require you to fine tune your R2 settings. Do not tamper with these commands unless you fully understand your switch's requirements. In nearly all cases, the country name use-defaults command fully configures your country's local settings. You should not need to use the commands in Step 5. See the cas-custom command reference page for more information about each signaling command. |
Use the following commands to monitor E1 R2 signaling:
| Command | Purpose |
|---|---|
show controllers e1 or show controllers e1 number | View the status for all controllers or a specific controller. Ensure the status indicates the controller is up and there are no alarms or errors (lines 2, 4, 9, and 10 as shown in Figure 44).
|
show modem csm [slot/port | group number] | View status for a specific modem as shown in Figure 45. |
5300#show controllers e1 0E1 0 is up.Applique type is Channelized E1 - balancedNo alarms detected.Version info of Slot 0: HW: 2, Firmware: 4, PLD Rev: 2Manufacture Cookie is not programmed.Framing is CRC4, Line Code is HDB3, Clock Source is Line Primary.Data in current interval (785 seconds elapsed):0 Line Code Violations, 0 Path Code Violations0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail SecsTotal Data (last 13 15 minute intervals):0 Line Code Violations, 0 Path Code Violations,0 Slip Secs, 12 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 12 Unavail Secs
5300#show modem csm 1/0MODEM_INFO: slot 1, port 0, unit 0, tone r2-compelled, modem_mask=0x0000, modem_port_offset=0tty_hwidb=0x60E63E4C, modem_tty=0x60C16F04, oobp_info=0x00000000, modem_pool=0x60BC60CCmodem_status(0x0002): VDEV_STATUS_ACTIVE_CALL.csm_state(0x0205)=CSM_IC5_CONNECTED, csm_event_proc=0x600CFF70, current call thru CAS lineinvalid_event_count=0, wdt_timeout_count=0wdt_timestamp_started is not activatedwait_for_dialing:False, wait_for_bchan:Falsepri_chnl=TDM_PRI_STREAM(s0, u3, c7), modem_chnl=TDM_MODEM_STREAM(s1, c0)dchan_idb_start_index=0, dchan_idb_index=0, call_id=0x0239, bchan_num=6csm_event=CSM_EVENT_DSX0_CONNECTED, cause=0x0000ring_no_answer=0, ic_failure=0, ic_complete=3dial_failure=0, oc_failure=0, oc_complete=0oc_busy=0, oc_no_dial_tone=0, oc_dial_timeout=0remote_link_disc=2, stat_busyout=2, stat_modem_reset=0oobp_failure=0call_duration_started=00:04:56, call_duration_ended=00:00:00, total_call_duration=00:01:43The calling party phone number =The called party phone number = 9993003total_free_rbs_timeslot = 0, total_busy_rbs_timeslot = 0, total_dynamic_busy_rbs_timeslot = 0, total_static_busy_rbs_timeslot = 0, min_free_modem_threshold = 0
If the connection does not come up, check the following:
If problems persist, enable the modem management Call Switching Module (CSM) debug mode, using the debug modem csm command, as shown in Figure 46.
5300#debug modem csm 1/0*May 15 04:05:46.675: VDEV_ALLOCATE: slot 2 and port 39 is allocated.*May 15 04:05:46.675: CSM_RX_CAS_EVENT_FROM_NEAT:(04BF): EVENT_CALL_DIAL_IN at slot 2 and port 39*May 15 04:05:46.675: CSM_PROC_IDLE: CSM_EVENT_DSX0_CALL at slot 2, port 39*May 15 04:05:46.675: Mica Modem(2/39): Configure(0x0)*May 15 04:05:46.675: Mica Modem(2/39): Configure(0x3)*May 15 04:05:46.675: Mica Modem(2/39): Configure(0x6)*May 15 04:05:46.675: Mica Modem(2/39): Call Setup*May 15 04:05:46.891: Mica Modem(2/39): State Transition to Call Setup*May 15 04:05:46.891: Mica Modem(2/39): Went offhook*May 15 04:05:46.891: CSM_PROC_IC1_RING: CSM_EVENT_MODEM_OFFHOOK at slot 2, port 39
When the E1 controller comes up, you will see the following messages:
%CONTROLLER-3-UPDOWN: Controller E1 0, changed state to up It also shows these messages for individual timeslots: %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 1 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 2 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 3 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 4 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 5 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 6 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 7 is up %DSX0-5-RBSLINEUP: RBS of controller 1 timeslot 8 is up
Enabling R1 Modified Signaling allows a Cisco AS5200 or Cisco AS5300 universal access server to talk to central office trunks that also use R1 Modified Signaling. R1 Signaling is an international signaling standard that is common to channelized T1/E1 networks; however, Cisco only has made this feature available in Taiwan. You can configure a channelized T1/E1 interface to support different types of R1 Modified Signaling, which is used in older analog telephone networks.
Cisco now supports native R1 signaling on both E1 and T1 interfaces. This version of software supports R1 signaling customized for Taiwan only. This feature allows enterprises and service providers to fully interoperate with the installed Taiwanese telecommunications standards, providing interoperability in addition to the vast array of Cisco's IOS troubleshooting and diagnostic capability. This will provide customers with a seamless, single-box, solution for their Taiwan signaling requirements.
The following prerequisites restrictions apply to the R1 Modified Signaling feature:
Figure 47 illustrates a service provider using R1 Signaling with E1 and a Cisco AS5200 access server. The network topology would be the same for T1 and/or a Cisco AS5300 access server.
R1 modified signaling can be configured on a Cisco AS5200 or a Cisco AS5300, using either T1 or E1 interface types. Use the commands in the following sections to configure R1 modified signaling:
To configure R1 modified signaling on a T1 interface, use the following commands:.
| Step | Command | Purpose |
|---|---|---|
| 1 | enable password
| Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to |
| 2 | configure terminal | Enter global configuration mode. You have entered global configuration mode when the prompt changes to |
| 3 | controller t1 [0 | Enter controller configuration mode to configure your T1 controller port. The T1 controller ports are labeled 0-3 on the quad T1/PRI cards. |
| 4 | framing {sf | esf} | Entering framing sf configures framing to T1 with sf. Entering framing esf configures framing to T1 only. |
| 5 | linecode {ami | b8zs} | Entering linecode ami configures line code to AMI1 encoding. Entering linecode b8zs configures line code to b8zs encoding. |
| 6 | clock source {line {primary | secondary} | internal} | Entering clock source line primary configures the clock source to the primary recovered clock. Entering clock source secondary configures the clock source to the secondary recovered clock. Entering clock source internal configures the clock source to the internal clock. |
| 7 | cas-group 1 timeslots 1-24 type r1-modified {ani-dnis | dnis} | Configure the timeslots that belong to each T1 circuit for R1 Modified Signaling. 2
|
| 8 | ^Z | Return to enable mode by simultaneously pressing the Ctrl key and the z key. This message is normal and does not indicate an error. |
| 1AMI = Alternate Mark Inversion. 2For additional details about the syntax and variables of this command see the Dial Solutions Command Reference in Cisco IOS Release 12.0. |
To configure R1 modified signaling on an E1 interface, use the following commands:
| Step | Command | Purpose |
|---|---|---|
| 1 | enable password | Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to |
| 2 | configure terminal | Enter global configuration mode. You have entered global configuration mode when the prompt changes to |
| 3 | controller e1 [0 | Enter controller configuration mode to configure your E1 controller ports. The E1 controller ports are labeled 0-3 on the quad E1/PRI cards. |
| 4 | framing {crc4 | no-crc4} | Entering framing crc4 configures framing to E1 with cyclic redundancy check (CRC) Entering framing no-crc4 configures framing to E1 only. |
| 5 | linecode {ami | hdb3} | Entering linecode ami configures line code to alternate mark inversion (AMI) encoding. Entering linecode hdb3 configures line code to high-density bipolar (HDB) encoding. |
| 6 | clock source {line {primary | secondary} | internal} | Entering clock source line primary configures the clock source to the primary recovered clock. Entering clock source secondary configures the clock source to the secondary recovered clock. Entering clock source internal configures the clock source to the internal clock. |
| 7 | cas-group 1 timeslots 1-15, 17-31 type r1-modified {ani-dnis | dnis}
| Configure the timeslots that belong to each E1 circuit for R1 Modified Signaling.
|
| 8 | cas-custom 1 | (Optional) Enter the channel number to customize. |
| 9 | ^Z | Return to enable mode by simultaneously pressing the Ctrl key and the z key. This message is normal and does not indicate an error. |
This section contains the following ISDN PRI examples:
The following example configures Network-Specific Facility (NSF), needed for an AT&T 4ESS switch when it is configured for Call-by-Call selection. The PRI 4ESS switch expects some AT&T-specific information when placing outgoing ISDN PRI voice calls; the options are accunet, sdn, and megacom.
This example shows both the controller and interface commands required to make the ISDN interface operational and the DDR commands, such as the dialer map, dialer-group, and map-class dialer commands, that are needed to configure the ISDN interface to make outgoing calls.
! The following lines configure the channelized T1 controller; all timeslots are ! configured for ISDN PRI. ! controller t1 1/1 framing esf linecode b8zs pri-group timeslots 1-23 isdn switchtype primary-4ess ! ! The following lines configure the D channel for DDR. This configuration applies ! to all B channels on the ISDN PRI interface. ! interface serial 1/1:23 description Will mark outgoing calls from AT&T type calls. ip address 7.1.1.1 255.255.255.0 encapsulation ppp dialer map ip 7.1.1.2 name tommyjohn class sdnplan 14193460913 dialer map ip 7.1.1.3 name angus class megaplan 14182616900 dialer map ip 7.1.1.4 name angus class accuplan 14193453730 dialer-group 1 ppp authentication chap map-class dialer sdnplan dialer outgoing sdn map-class dialer megaplan dialer voice-call dialer outgoing mega map-class dialer accuplan dialer outgoing accu
! T1 PRI controller configuration controller T1 0 framing esf linecode b8zs clock source line primary pri-group timeslots 1-24 ! controller T1 1 framing esf linecode b8zs clock source line secondary pri-group timeslots 1-24 ! interface Serial0:23 isdn incoming-voice modem dialer rotary-group 1 ! interface Serial1:23 isdn incoming-voice modem dialer rotary-group 1 ! interface Loopback0 ip address 172.16.254.254 255.255.255.0 ! interface Ethernet0 ip address 172.16.1.1 255.255.255.0 ! interface Group-Async1 ip unnumbered Loopback0 ip tcp header-compression passive encapsulation ppp async mode interactive peer default ip address pool default dialer-group 1 ppp authentication chap pap default group-range 1 48 ! interface Dialer1 ip unnumbered Loopback0 encapsulation ppp peer default ip address pool default ip local pool default 172.16.254.1 172.16.254.48 dialer in-band dialer-group 1 dialer idle-timeout 3600 ppp multilink ppp authentication chap pap default
! E1 PRI controller configuration controller E1 0 framing crc4 linecode hdb3 clock source line primary pri-group timeslots 1-31 ! controller E1 1 framing crc4 linecode hdb3 clock source line secondary pri-group timeslots 1-31 interface serial0:15 isdn incoming-voice modem dialer rotary-group 1 ! interface serial1:15 isdn incoming-voice modem dialer rotary-group 1 ! interface loopback0 ip address 172.16.254.254 255.255.255.0 ! interface ethernet0 ip address 172.16.1.1 255.255.255.0 ! !The following block of commands configures DDR for all the ISDN PRI interfaces !configured above. The dialer-group and dialer rotary-group commands tie the !interface configuration blocks to the DDR configuration. ! interface dialer1 ip unnumbered loopback0 encapsulation ppp peer default ip address pool default ip local pool default 172.16.254.1 172.16.254.60 dialer in-band dialer-group 1 dialer idle-timeout 3600 ppp multilink ppp authentication chap pap default
The following example configures an ISDN switch type of primary-4ess on channelized T1 controller 0 and a switch type of primary-net5 for channelized T1 controller 1.
controller t1 0 framing esf linecode b8zs isdn switchtype primary-4ess
! controller t1 1 framing esf linecode b8zs isdn switchtype primary-net5
The following example shows BRI interface 0 configured for a basic-net3 switch type that will override the basic-ni switch type configured globally. The PRI interface (channelized T1 controller), is configured for ISDN switch type primary-net5 and is applied only to the PRI interface.
isdn switch-type basic-ni
!
interface BRI0
isdn switch-type basic-net3
interface serial0:23
! Apply the primary-net5 switch to this interface only
isdn switch-type primary-net5
The following example configures the router to use global isdn switch-type primary-ni and configures the ISDN outgoing call channel selection to be made in ascending order:
isdn switch-type primary-ni
!
interface serial0:23
isdn bchan-number-order ascending
controller t1 0 channel-group 0 timeslot 1-6 channel-group 1 timeslot 7 channel-group 2 timeslot 8 channel-group 3 timeslot 9-11 pri-group timeslot 12-24
The same type of configuration also applies to channelized E1.
This section provides sample configurations for the Cisco AS5200's T1 controllers. You can configure the 24 channels of a channelized T1 to support ISDN PRI, robbed-bit signaling, channel grouping, or a combination of all three. It provides the following sections:
The following example configures all 24 channels to support robbed-bit signaling feature group B on a Cisco AS5200:
controller T1 0 cas-group 1 timeslots 1-24 type e&m-fgb
The following example shows you how to configure all 24 channels to support a combination of ISDN PRI, robbed-bit signaling, and channel grouping. The range of timeslots that you allocate must match the timeslot allocations that your central office chooses to use. This is a rare configuration due to the complexity of aligning the correct range of timeslots on both ends of the connection.
The following configuration creates serial interfaces 0 to 9, which correspond to ISDN PRI timeslots 1 to 10 (shown as serial 1:0 through serial 1:9). The serial line 1:23 is the D channel, which carries the analog signal bits that dial a modem's phone number and determine if a modem is busy or available. The D channel is automatically created and assigned to timeslot 24.
controller T1 0 ! ISDN PRI is configured on timeslots 1 through 10. pri-group timeslots 1-10 ! Channelized T1 data is transmitted over timeslots 11 through 16. channel-group 11 timeslots 11-16 ! The channel-associated signal ear and mouth feature group B is configured on ! virtual signal group 17 for timeslots 17 to 23, which are used for incoming ! and outgoing analog calls. cas-group 17 timeslots 17-23 type e&m-fgb
There is no specific interface, such as the serial interface shown in the earlier examples, that corresponds to the timeslot range.
The following switched 56k configuration examples are provided:
The following shows how to configure one T1 controller on a Cisco AS5300 to support switched 56k digital calls. The Cisco AS5300 has four controllers, which are numbered 0 to 3. If you want all four T1s to support switched 56k calls, then repeat this procedure on each T1 controller.
Step 1 Enter global configuration mode using the configure terminal command:
router# configure terminal Enter configuration commands, one per line. End with CNTL/Z.
Step 2 Specify a T1 controller with the controller t1 number command. Replace the number variable with a controller number between 0 and 3.
router(config)# controller t1 1
Step 3 Configure robbed-bit signaling on a range of timeslots then specify switched 56k digital services using the cas-group command. In this example, all calls coming into controller T1 1 are expected to be switched 56k data calls, not analog modem calls.
router(config-controller)# cas-group 1 timeslots 1-24 type e&m-fgb service data
Step 4 Set the framing for your network environment. You can choose extended superframe (enter framing esf) or superframe (enter framing sf).
router(config-controller)# framing esf
Step 5 Set the line code type for your network environment. You can choose AMI encoding (enter linecode ami) or B8ZS encoding (enter linecode b8zs).
router(config-controller)# linecode b8zs
The following example configures one T1 controller to accept incoming switched 56k digital calls and analog modem calls over the same T1 CAS line. Timeslots 1 through 10 are provisioned by the telco to support switched 56k digital calls. Timeslots 11 through 24 are provisioned to support analog modem calls. Due to the DS0s provisioning, it is impossible for analog modems calls to transmit over the DS0s that map to timeslots 1 through 10.
router(config)# controller T1 0 router(config-controller)# cas-group 1 timeslots 1-10 type e&m-fgb service data router(config-controller)# cas-group 1 timeslots 11-24 type e&m-fgb service voice router(config-controller)# framing esf router(config-controller)# clock source line primary router(config-controller)# linecode b8zs router(config-controller)# exit
The following example configures one Cisco AS5300 to accept 50 percent switched 56k digital calls and 50 percent analog modem calls. The controllers T1 0 and T1 1 are configured to support the switched 56k digital calls using the cas-group 1 timeslots 1-24 type e&m-fgb service digital command. The controllers T1 2 and T1 3 are configured to support analog modem calls.
router(config)# controller T1 0 router(config-controller)# cas-group 1 timeslots 1-24 type e&m-fgb service data router(config-controller)# framing esf router(config-controller)# clock source line primary router(config-controller)# linecode b8zs router(config-controller)# exit router(config)# controller T1 1 router(config-controller)# cas-group 1 timeslots 1-24 type e&m-fgb service data router(config-controller)# framing esf router(config-controller)# clock source line secondary router(config-controller)# linecode b8zs router(config-controller)# exit router(config)# controller T1 2 router(config-controller)# cas-group 1 timeslots 1-24 type e&m-fgb service voice router(config-controller)# framing esf router(config-controller)# clock source internal router(config-controller)# linecode b8zs router(config-controller)# exit router(config)# controller T1 3 router(config-controller)# cas-group 1 timeslots 1-24 type e&m-fgb service voice router(config-controller)# framing esf router(config-controller)# clock source internal router(config-controller)# linecode b8zs router(config-controller)# exit router(config)# copy running-config startup-config
The startup configuration in this section runs on the Cisco AS5300 in Figure 42. This configuration is for an IP dial-in scenario with a mix of switched 56k calls and modem calls. Switched 56k digital calls come into controllers T1 0 and T1 1. Analog modem calls come into controllers T1 2 and T1 3.
In this example, the switched 56k clients are single end points in a remote node configuration. If each switched 56k client were instead a router with a LAN behind it without port address translation (PAT) turned on, then a static address, subnet mask, and route must be configured for each remote end point. This is best done through RADIUS.
After a T1 timeslot is configured with robbed-bit signaling using the cas-group command with the service data option, a logical serial interface is instantly created for each switched 56k channel. For example, signaling configured on all 24 timeslots of controller T1 1 dynamically creates serial interfaces S0:0 through S0:23. You must then configure protocol support on each serial interface. No interface group command exists for serial interfaces, unlike asynchronous interfaces via the interface group-async command. Each serial interface must be individually configured. In most cases, the serial configurations will be identical. To streamline or shorten this configuration task, you might consider using a dialer interface as shown in the example.
! version 11.3 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption no service udp-small-servers no service tcp-small-servers ! hostname 5300 ! aaa new-model aaa authentication login default local aaa authentication login console enable aaa authentication login vty local aaa authentication login dialin radius aaa authentication ppp default local aaa authentication ppp dialin if-needed radius aaa authorization exec local radius aaa authorization network radius aaa accounting network start-stop radius aaa accounting exec start-stop radius ! enable secret cisco ! username admin password cisco async-bootp dns-server 10.1.3.1 10.1.3.2 ! ! !Switched 56k calls come into controllers T1 0 and T1 1. Take note of the keywords !"service data" in the cas-group command. ! controller T1 0 framing esf clock source line primary linecode b8zs cas-group 0 timeslots 1-24 type e&m-fgb service data ! controller T1 1 framing esf clock source line secondary linecode b8zs cas-group 1 timeslots 1-24 type e&m-fgb service data ! !Analog modem calls come into controllers T1 2 and T1 3. ! controller T1 2 framing esf clock source line internal linecode b8zs cas-group 2 timeslots 1-24 type e&m-fgb ! controller T1 3 framing esf clock source line internal linecode b8zs cas-group 3 timeslots 1-24 type e&m-fgb ! interface loopback0 ip address 10.1.2.62 255.255.255.192 ! interface Ethernet0 no ip address shutdown ! interface FastEthernet0 ip address 10.1.1.11 255.255.255.0 ip summary address eigrp 10.10.1.2.0 255.255.255.192 ! ! Interface serial0:0 maps to the first switched 56k channel. The dialer pool-member ! command connects ! this channel to dialer interface 1. ! interface Serial0:0 dialer rotary-group 1 ! interface Serial0:1 dialer rotary-group 1 ! interface Serial0:2 dialer rotary-group 1 ! interface Serial0:3 dialer rotary-group 1 ! interface Serial0:4 dialer rotary-group 1 ! interface Serial0:5 dialer rotary-group 1 ! interface Serial0:6 dialer rotary-group 1 ! interface Serial0:7 dialer rotary-group 1 ! interface Serial0:8 dialer rotary-group 1 ! interface Serial0:9 dialer rotary-group 1 ! interface Serial0:10 dialer rotary-group 1 ! interface Serial0:11 dialer rotary-group 1 ! interface Serial0:12 dialer rotary-group 1 ! interface Serial0:13 dialer rotary-group 1 ! interface Serial0:14 dialer rotary-group 1 ! interface Serial0:15 dialer rotary-group 1 ! interface Serial0:16 dialer rotary-group 1 ! interface Serial0:17 dialer rotary-group 1 ! interface Serial0:18 dialer rotary-group 1 ! interface Serial0:19 dialer rotary-group 1 ! interface Serial0:20 dialer rotary-group 1 ! interface Serial0:21 dialer rotary-group 1 ! interface Serial0:22 dialer rotary-group 1 ! !Interface serial 0:23 is the last switched 56k channel for controller T1 0. ! interface Serial0:23 dialer rotary-group 1 ! !The switched 56k channels for controller T1 1 begin with interface serial 1:0 and end !with interface serial 1:23. ! interface Serial1:0 dialer rotary-group 1 ! interface Serial1:1 dialer rotary-group 1 ! interface Serial1:2 dialer rotary-group 1 ! interface Serial1:3 dialer rotary-group 1 ! interface Serial1:4 dialer rotary-group 1 ! interface Serial1:5 dialer rotary-group 1 ! interface Serial1:6 dialer rotary-group 1 ! interface Serial1:7 dialer rotary-group 1 ! interface Serial1:8 dialer rotary-group 1 ! interface Serial1:9 dialer rotary-group 1 ! interface Serial1:10 dialer rotary-group 1 ! interface Serial1:11 dialer rotary-group 1 ! interface Serial1:12 dialer rotary-group 1 ! interface Serial1:13 dialer rotary-group 1 ! interface Serial1:14 dialer rotary-group 1 ! interface Serial1:15 dialer rotary-group 1 ! interface Serial1:16 dialer rotary-group 1 ! interface Serial1:17 dialer rotary-group 1 ! interface Serial1:18 dialer rotary-group 1 ! interface Serial1:19 dialer rotary-group 1 ! interface Serial1:20 dialer rotary-group 1 ! interface Serial1:21 dialer rotary-group 1 ! interface Serial1:22 dialer rotary-group 1 ! interface Serial1:23 dialer rotary-group 1 ! interface Group-Async1 ip unnumbered Loopback0 encapsulation ppp async mode interactive peer default ip address pool dialin_pool no cdp enable ppp authentication chap pap dialin group-range 1 96 ! interface Dialer1 ip unnumbered Loopback0 no ip mroute-cache encapsulation ppp peer default ip address pool dialin_pool no fair-queue no cdp enable ppp authentication chap pap dialin ! router eigrp 10 network 10.0.0.0 passive-interface Dialer0 no auto-summary ! ip local pool dialin_pool 10.1.2.1 10.1.2.96 ip default-gateway 10.1.1.1 ip classless ! dialer-list 1 protocol ip permit radius-server host 10.1.1.23 auth-port 1645 acct-port 1646 radius-server host 10.1.1.24 auth-port 1645 acct-port 1646 radius-server key cisco ! line con 0 login authentication console line 1 96 autoselect ppp autoselect during-login login authentication dialin modem DialIn line aux 0 login authentication console line vty 0 4 login authentication vty transport input telnet rlogin ! end
This section provides channelized E1 sample configurations for the Cisco AS5200. You can configure the 30 available channels with channel-associated signaling, channel grouping, or a combination of the two.
The following interactive example configures channels (also known as timeslots) 1-30 with ear and mouth channel signaling and feature group B support on a Cisco AS5200; it also shows that the router displays informative messages about each timeslot. Signaling messages are transmitted in the 16th timeslot; therefore, that timeslot is not brought up.
Router# %SYS-5-CONFIG_I: Configured from console by console Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)# controller e1 0 Router(config-controller)# cas-group 1 timeslots 1-31 type e&m-fgb Router(config-controller)# %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 1 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 2 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 3 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 4 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 5 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 6 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 7 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 8 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 9 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 10 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 11 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 12 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 13 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 14 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 15 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 17 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 18 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 19 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 20 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 21 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 22 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 23 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 24 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 25 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 26 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 27 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 28 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 29 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 30 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 31 is up
The following interactive example shows you how to configure an E1 controller to support a combination of channel-associated signaling and channel grouping. The range of timeslots that you allocate must match the timeslot allocations that your central office chooses to use. This is a rare configuration because of the complexity of aligning the correct range of timeslots on both ends of the connection.
Timeslots 1 through 15 are assigned to channel group 1. In turn, these timeslots are assigned to serial interface 0 and virtual channel group 1 (shown as serial 0:1).
AS5200(config)# controller e1 0 Router(config-controller)# channel-group 1 timeslots 1-15 Router(config-controller)# %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0:1, changed state to down %LINK-3-UPDOWN: Interface Serial0:1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0:1, changed state to up
Timeslots 17 to 31 are configured with channel associated signaling.
Router(config-controller)# cas-group 2 timeslots 17-31 type e&m-fgb %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0:1, changed state to down Router(config-controller)# %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 17 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 18 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 19 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 20 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 21 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 22 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 23 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 24 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 25 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 26 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 27 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 28 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 29 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 30 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 31 is up Router(config-controller)#
The following example configures R2 signaling and customizes R2 parameters on controller E1 2 of a Cisco AS5300. In most cases, the same R2 signaling type is configured on each E1 controller.
Step 1 Enter global configuration mode using the configure terminal command:
as5300# configure terminal Enter configuration commands, one per line. End with CNTL/Z.
Step 2 Specify the E1 controller that you want to configure with R2 signaling using the controller e1 number global configuration command. A controller informs the access server how to distribute or provision individual timeslots for a connected channelized E1 line. You must configure one E1 controller for each E1 line.
as5300(config)# controller e1 2
Step 3 Configure channel associated signaling with the cas-group channel timeslots range type signal command. The signaling type forwarded by the connecting telco switch must match the signaling configured on the Cisco AS5300. The Cisco IOS configuration options are r2-analog, r2-digital, or r2-pulse.
as5300(config-controller)# cas-group 1 timeslots 1-31 type ? e&m-fgb E & M Type II FGB e&m-fgd E & M Type II FGD e&m-immediate-start E & M Immediate Start fxs-ground-start FXS Ground Start fxs-loop-start FXS Loop Start p7 P7 Switch r2-analog R2 ITU Q411 r2-digital R2 ITU Q421 r2-pulse R2 ITU Supplement 7 sas-ground-start SAS Ground Start sas-loop-start SAS Loop Start
The following example specifies R2 ITU Q421 digital line signaling (r2-digital). This example also specifies R2 compelled register signaling and provisions the ANI ADDR option.
as5300(config-controller)# cas-group 1 timeslots 1-31 type r2-digital r2-compelled ani as5300(config-controller)# %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 1 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 2 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 3 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 4 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 5 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 6 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 7 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 8 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 9 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 10 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 11 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 12 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 13 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 14 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 15 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 17 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 18 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 19 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 20 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 21 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 22 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 23 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 24 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 25 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 26 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 27 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 28 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 29 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 30 is up %DSX0-5-RBSLINEUP: RBS of controller 0 timeslot 31 is up
Step 4 Customize some of the E1 R2 signaling parameters with the cas-custom channel controller configuration command. This example specifies the default R2 settings for Argentina. For custom options, see the cas-custom command in the Dial Configurations Command Reference in Cisco IOS Release 12.0.
as5300(config-controller)# cas-custom 1 as5300(config-ctrl-cas)# ? CAS custom commands: ani-digits Expected number of ANI digits answer-signal Answer signal to be used caller-digits Digits to be collected before requesting CallerID category Category signal country Country Name default Set a command to its defaults dnis-digits Expected number of DNIS digits exit Exit from cas custom mode invert-abcd invert the ABCD bits before tx and after rx ka KA Signal kd KD Signal metering R2 network is sending metering signal nc-congestion Non Compelled Congestion signal no Negate a command or set its defaults request-category DNIS digits to be collected before requesting category unused-abcd Unused ABCD bit values as5300(config-ctrl-cas)# country ? argentina Argentina australia Australia brazil Brazil china China colombia Colombia . . . as5300(config-ctrl-cas)# country argentina ? use-defaults Use Country defaults <cr> as5300(config-ctrl-cas)# country argentina use-defaults
The following example shows a configuration sample for R1 modified signaling, using an E1 interface:
version 11.3 service timestamps debug datetime msec no service password-encryption ! hostname router ! enable secret 5 $1$YAaG$L0jTcQ.nMH.gpFYXaOU5c. ! no modem fast-answer ip host dirt 223.255.254.254 ip multicast rpf-check-interval 0 isdn switch-type primary-dms100 ! ! controller E1 0 clock source line primary cas-group 1 timeslots 1-15,17-31 type r1-modified ani-dnis ! controller E1 1 clock source line secondary cas-group 1 timeslots 1-15,17-31 type r1-modified ani-dnis ! controller E1 2 clock source internal ! controller E1 3 clock source internal ! interface Ethernet0 ip address 1.19.36.7 255.255.0.0 no ip mroute-cache ! interface FastEthernet0 no ip address no ip route-cache no ip mroute-cache shutdown ! interface Group-Async1 ip unnumbered Ethernet0 encapsulation ppp dialer in-band dialer idle-timeout 480 dialer-group 1 async dynamic address async mode interactive peer default ip address pool DYNAMIC no fair-queue no cdp enable group-range 1 108 ! router igrp 200 network 1.0.0.0 network 223.255.254.0 ! no ip classless ip route 0.0.0.0 0.0.0.0 Ethernet0 logging source-interface Ethernet0 ! line con 0 exec-timeout 0 0 line 1 108 exec-timeout 0 0 modem InOut transport input all line aux 0 line vty 0 4 ! end
Posted: Mon Jan 3 11:25:27 PST 2000
Copyright 1989-1999©Cisco Systems Inc.