Configuring ISDN PRI and Other Signaling on E1 and T1 Lines

ISDN, which uses the D channel for signaling and the B channels for user data, fits into the out-of-band signaling category.

Channel-associated signaling (CAS), which uses E1 time slot 16 (the D channel) for signaling, fits into the out-of-band signaling category.

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.

Perform the tasks in the following sections to configure ISDN PRI:

This process varies dramatically from provider to provider on a national and international basis. However, some general guidelines follow:

	Command	Purpose
Step 1	isdn switch-type switch-type	Selects a service provider switch type that accommodates PRI. (Refer to Table 17 for a list of supported switch type keywords.)
Step 2	controller e1 slot/port or controller e1 number	Defines the controller location in the Cisco 7200 or Cisco7500 series router by slot and port number. Defines the controller location in the Cisco 4000 series or the Cisco AS5200 universal access server by unit number.1
Step 3	framing crc4	Defines the framing characteristics as cyclic redundancy check 4 (CRC4).
Step 4	linecode hdb3	Defines the line code as high-density bipolar 3 (HDB3).
Step 5	pri-group [timeslots range]	Configures ISDN PRI.

1Controller numbers range 0 through 2 on the Cisco 4000 series and 1 to 2 on the Cisco AS5200 access server.

	Command	Purpose
Step 1	isdn switch-type switch-type	Selects a service provider switch type that accommodates PRI. (Refer to Table 17 for a list of supported PRI switch type keywords.)
Step 2	controller t1 slot/port or controller t1 number	Specifies a T1 controller on a Cisco 7500. Specifies a T1 controller on a Cisco 4000.1
Step 3	framing esf	Defines the framing characteristics as Extended Superframe Format (ESF).
Step 4	linecode b8zs	Defines the line code as binary 8 zero substitution (B8ZS).
Step 5	pri-group [timeslots range]2	Configures ISDN PRI. If you do not specify the time slots, the controller is configured for 23 B channels and 1 D channel.

1Controller numbers range 0 through 2 on the Cisco 4000 series and 1 to 2 on the Cisco AS5200. 2On channelized T1, time slots range 1 to 24. You can specify a range of time slots (for example, pri-group timeslots 12-24) if other time slots are used for non-PRI channel groups.

Each ISDN B channel is treated as a serial line and supports HDLC and PPP encapsulation. The default serial encapsulation is HDLC. To configure PPP encapsulation, use the following command in interface configuration mode:

Command	Purpose
encapsulation ppp	Configures PPP encapsulation.

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:

	Command	Purpose
Step 1	encapsulation cpp	Specifies CPP encapsulation.
Step 2	cpp callback accept	Enables CPP callback acceptance.
Step 3	cpp authentication	Enables 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.

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 5 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	Enables 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.

Command	Purpose
isdn incoming-voice modem	Routes incoming ISDN modem calls to the modem module.

To enable the router to for NSF call-by-call support and, optionally, to place outgoing voice calls, complete the following steps:

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.

	Command	Purpose
Step 1	map-class dialer classname	Specifies the dialer map class, using the dialing-plan keyword as the class name.
Step 2	dialer voice-call	(Optional) Enables voice calls.
Step 3	dialer outgoing classname	Configures the specific dialer map class to make outgoing calls.

Note   To set the called party type to international, the dialed number must be prefaced by 011.

If, for example, you reconfigure the router to use global switch type keyword basic-net3, the router will apply the Primary-Net5 switch type to PRI interfaces and the NET3 ISDN switch type to any BRI interfaces. You can override the default switch assignment by configuring a different ISDN switch type on the associated interface.

Command	Purpose
show interfaces serial slot/port bchannel channel-number (Cisco7500 series) or show interfaces serial number bchannel channel-number (Cisco4000 series)	Displays information about the physical attributes of the ISDN PRI over T1 B and Dchannels.
show interfaces serial slot/port bchannel channel-number (Cisco7500 series) or show interfaces serial number bchannel channel-number (Cisco4000 series)	Displays information about the physical attributes of the ISDN PRI over E1 B and Dchannels.
show controllers t1 [slot/port] (Cisco7500 series) or show controllers t1 number (Cisco4000 series)	Displays information about the T1 links supported on the ISDN PRI B and Dchannels.
show controllers e1 [slot/port] (Cisco7500 series) or show controllers e1 number (Cisco4000 series)	Displays information about the E1 links supported on the ISDN PRI B and Dchannels.
show isdn {active | history | memory | services | status [dsl | serial number] | timers}	Displays 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]	Obtains 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 time slot 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 additional signaling information is added to support channel banks in the network that convert various battery and ground operations on analog lines into signaling bits.

Robbed-bit signaling configured on the Cisco AS5200 access server enables integrated modems in to answer and send analog calls. Robbed bits are forwarded over digital lines. To support analog signaling over T1 lines on the Cisco AS5200 access server, robbed-bit signaling must be enabled.

Note   The signal type configured on the access server must match the signal type offered by your telco provider. Ask your telco provider which signal type to configure on each T1 controller.

The Cisco AS5200 access server 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:

	Command	Purpose
Step 1	controller t1 0	Enables the T1 0 controller, and enter controller configuration mode.
Step 2	cablelength long dbgain-value dbloss-value	If the channelized T1 line connects to a smart jack instead of a CSU, sets pulse equalization (use parameter values specified by your telco service provider).
Step 3	framing esf	Sets the framing to match that of your telco service provider, which in most cases is esf.
Step 4	linecode b8zs	Sets the line-code type to match that of your telco service provider, which in most cases is b8zs.
Step 5	clock source line primary	Configures one T1 line to serve as the primary or most stable clock source line.
Step 6	cas-group channel-number timeslots range typesignal	Configures channels to accept voice calls. This step creates interfaces that you can configure.
Step 7	fdl {att | ansi}	Sets 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 line 1 as the secondary clock source.

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.

• Enables ISDN BRI clients to connect to a Cisco AS5300 or Cisco AS5200 access server over switched 56K and T1 CAS.

• Provides switched 56K dial-in services over T1 CAS to remote clients that do not have access to ISDN BRI, for example, a remote PC making digital calls over a 2- or 4-wire switched 56-kbps connection and a CSU.

The following restrictions apply to Switched 56K digital dial-in:

To configure an access server to support switched 56K digital calls, use the following commands beginning in privileged EXEC mode:

	Command	Purpose
Step 1	configure terminal	Enters global configuration mode.
Step 2	controllers t1 number	Specifies a T1 controller.
Step 3	framing {sf | esf}	Sets the framing.
Step 4	linecode {ami | b8zs}	Defines the line code.
Step 5	clock source {line {primary | secondary} | internal}	Specifies the clocking.
Step 6	cas-group channel timeslots range type signal	Configures robbed-bit signaling for a range of time slots. A logical serial interface is automatically created for each switched 56K channel.
Step 7	exit	Exits controller configuration mode.
Step 8	interface serial number:number	Specifies logical serial interface, which was dynamically created when the cas-group is issued, and configures the core protocol characteristics for the serial interface.

	Command	Purpose
Step 1	controller e1 slot/port	Specifies the E1 controller that you want to configure with R2 signaling.
Step 2	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: r2-analog [dtmf | r2-compelled [ani] | r2-non-compelled [ani] | r2-semi-compelled [ani]] or r2-digital [dtmf | r2-compelled [ani] | r2-non-compelled [ani] | r2-semi-compelled [ani]] or r2-pulse [dtmf | r2-compelled [ani] | r2-non-compelled [ani] | r2-semi-compelled [ani]]	Configures R2 channel associated signaling on the E1 controller. For a complete description of the available R2 options, see the cas-group command. The R2 part of this command is defined by the signal variable in the cas-group command.
Step 3	cas-custom channel	Enters CAS custom mode, which enables you to localize some of the E1R2 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.
Step 4	country name use-defaults	Specifies the local country, region, or corporation specification to use with R2 signaling. Replace the name variable with one of the supported country names. We recommend 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 Cisco IOS Dial Services Command Reference publication for the list of supported countries, regions, and corporation specifications.
Step 5	ani-digits answer-signal caller-digits category country default dnis-digits invert-abcd ka kd metering nc-congestion unused-abcd request-category	(Optional) Further customizes 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 the requirements of your switch. In nearly all cases, the country name use-defaults command fully configures the local settings for your country. You should not need to use the commands in Step 5. See the cas-custom command in the Cisco IOS Dial Services Command Reference publication for more information about each signaling command.

5300# show controllers e1 0
E1 0 is up.
  Applique type is Channelized E1 - balanced
  No alarms detected.
  Version info of Slot 0:  HW: 2, Firmware: 4, PLD Rev: 2
 
Manufacture 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 Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Total 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 1/0
MODEM_INFO: slot 1, port 0, unit 0, tone r2-compelled, modem_mask=0x0000, modem_port_offset=0
tty_hwidb=0x60E63E4C, modem_tty=0x60C16F04, oobp_info=0x00000000, modem_pool=0x60BC60CC
modem_status(0x0002): VDEV_STATUS_ACTIVE_CALL.
csm_state(0x0205)=CSM_IC5_CONNECTED, csm_event_proc=0x600CFF70, current call thru CAS line
invalid_event_count=0, wdt_timeout_count=0
wdt_timestamp_started is not activated
wait_for_dialing:False, wait_for_bchan:False
pri_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=6
csm_event=CSM_EVENT_DSX0_CONNECTED, cause=0x0000
ring_no_answer=0, ic_failure=0, ic_complete=3
dial_failure=0, oc_failure=0, oc_complete=0
oc_busy=0, oc_no_dial_tone=0, oc_dial_timeout=0
remote_link_disc=2, stat_busyout=2, stat_modem_reset=0
oobp_failure=0
call_duration_started=00:04:56, call_duration_ended=00:00:00, total_call_duration=00:01:43
The calling party phone number = 
The called party phone number  = 9993003
total_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

• Loose wires, splices, connectors, shorts, bridge taps, and grounds

• Backward send and receive

• Mismatched framing types (for example, CRC-4 versus no CRC-4)

• Send and receive pair separation (crosstalk)

• Faulty line cards or repeaters

• Noisy lines (for example, power and crosstalk)

If you see errors on the line or the line is going up and down, check the following:

• Mismatched line codes (HDB3 versus AMI)

• Receive level

• Frame slips due to poor clocking plan

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

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 IOS troubleshooting and diagnostic capability. This feature will provide customers with a seamless, single-box solution for their Taiwan signaling requirements.

Note   This type of signaling is not the same as ITU R1 signaling; it is R1 signaling modified for Taiwan specifically. In the future, R1 modified signaling will be supported by the Cisco AS5800 access server, and will also be available in Turkey.

The following restrictions are for the use of R1 modified signaling:

• Because different line signaling uses different A/B/C/D bit definitions to represent the line state, you must understand the configuration of the T1/E1 trunk before configuring the CAS group. If the wrong type of provision is configured, the access server might interpret the wrong A/B/C/D bit definitions and behave erratically.

• Cisco access servers (Cisco AS5200, Cisco AS5300, and Cisco AS5800) with Microcom modems cannot support this feature.

• You must know the configuration of the T1/E1 trunk before configuring the cas-group. If there is a trunk provisioning mismatch, performance problems may occur.

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:

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	Loops the T1 controller toward the router and toward the line.

Command	Purpose
ping protocol protocol-address	Pings the interface address.

Check errors by using the following command in EXEC mode:

Command	Purpose
show controllers t1	Checks errors.

If any errors occur, or the controller fails to change to the up state, please contact the Cisco Technical Assistance Center (TAC).

Because the controller local loopback is bidirectional, the service provider can test the line integrity using a T1 bit error rate tester (BERT) test set.

Command	Purpose
loopback remote controller	Places the T1 controller in remote loopback.

Note   If controller loopbacks are used, they will disrupt service for all channel groups on that interface.

To check errors, if any, use the following command in EXEC mode:

Command	Purpose
show controllers t1	Checks errors.

If any errors occur, they are 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.

Note   None of the Cisco channelized interfaces will react to any loop codes. To loop a channelized interface requires that the configuration command be entered manually.

Two loopbacks are available for channel groups and are described in the following sections:

To place the serial interface (channel group) into local loopback, use the following command in interface configuration mode:

Command	Purpose
loopback local	Places the serial interface (channel group) in local loopback.

Command	Purpose
loopback remote interface	Places the serial interface (channel group) in remote loopback.

Using the loopback remote interface command sends a latched CSU loopback command to the remote CSU/DSU. The router must detect the response code, at which time the remote loopback is verified.

! 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 

Note   Use this same procedure for configuring a Cisco AS5200 access server.

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 from 0 to 3.

router(config)# controller t1 1
 

Step 3   Configure robbed-bit signaling on a range of time slots, 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

Note   Be sure your signaling type matches the signaling type specified by the central office or telco on the other end. For a list of supported signaling types and how to collect DNIS, see the cas-group command reference page for the E1 controller card in the Cisco IOS Dial Services Command Reference publication.

Step 4   Set the framing for your network environment. You can choose ESF (enter framing esf) or SF (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

controller T1 0
 cas-group 1 timeslots 1-10 type e&m-fgb service data
 cas-group 1 timeslots 11-24 type e&m-fgb service voice
 framing esf
 clock source line primary
 linecode b8zs
 exit

controller T1 0
 cas-group 1 timeslots 1-24 type e&m-fgb service data
 framing esf
 clock source line primary
 linecode b8zs
 exit
controller T1 1
 cas-group 1 timeslots 1-24 type e&m-fgb service data
 framing esf
 clock source line secondary
 linecode b8zs
 exit
controller T1 2
 cas-group 1 timeslots 1-24 type e&m-fgb service voice
 framing esf
 clock source internal
 linecode b8zs
 exit
controller T1 3
 cas-group 1 timeslots 1-24 type e&m-fgb service voice
 framing esf
 clock source internal
 linecode b8zs
 exit
copy running-config startup-config

In this example, the switched 56K clients are single endpoints 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 endpoint. This configuration would best done through RADIUS.

After a T1 time slot 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 time slots 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 following example.

Note   In this example, only analog modem calls encounter the group asynchronous and line interfaces. Switched 56K calls encounter the logical serial interfaces and dialer interface.

!
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

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 time slots for a connected channelized E1 line. You must configure one E1 controller for each E1 line.

as5300(config)# controller e1 2
 

Step 3   Configure CAS 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 access server. 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
 

Note   The actual R2 CAS is configured on the 16th time slot, which is why the time slot does not come up in the example output. For a description of the supported R2 signaling options, see the cas-group command for the E1 controller in the Cisco IOS Dial Services Command Reference publication.

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 Cisco IOS Dial Services Command Reference publication.

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

Note   We highly recommend that you specify the default settings of your country. To display a list of supported countries, enter the country? command. The default setting for all countries is ITU.

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
 

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 T1 1/1/0
 framing esf
 linecode b8zs
 cablelength short 133
 pri-group timeslots 1-24
 fdl att
!
controller T1 1/1/1
 framing esf
 linecode b8zs
 cablelength short 133
 cas-group 1 timeslots 1-24 type r1-modified
 fdl att
!
controller T1 1/1/2
 framing esf
 linecode b8zs
 cablelength short 133
 pri-group timeslots 1-24
 fdl att
!
controller T1 1/1/3
 framing esf
 linecode b8zs
 cablelength short 133
 pri-group timeslots 1-24
 fdl att
!