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The Modem over Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) feature for the Cisco 3640 modular access router lowers the cost of remote access by offering high-speed modem and ISDN connectivity for mobile customers, home-offices, and other remote-access users. Branch offices and enterprises can support analog modem users who call over the public switched telephone network (PSTN) into BRI interfaces in Cisco 3640 routers.
Analog modem calls arrive at a speed of 33.6 kilobits per second (kbps) via the PSTN. The router's digital modems accept the modem calls at connection speeds as fast as 56 kbps, adhering to the V.90 standard. As shown in Figure 1, the Cisco 3640 router in this way provides rapid access to email and other network services.
The following are benefits of using Modem over ISDN BRI:
BRI---Basic Rate Interface. ISDN interface composed of two B channels and one D channel for circuit-switched communication of voice, video, and data.
ISDN---Integrated Services Digital Network. Communication protocol, offered by telephone companies, that permits telephone networks to carry data, voice, and other source traffic.
NM---network module.
POTS---Plain Old Telephone Service. Basic telephone service supplying standard single-line telephones, telephone lines, and access to the public switched telephone network.
PRI---Primary Rate Interface. ISDN interface to primary rate access. Primary rate access consists of a single 64-Kbps D channel plus 23 (T1) or 30 (E1) B channels for voice or data.
PSTN---public switched telephone network. PSTN refers to the local telephone company.
SPID---service profile identifier. Number that some service providers use to define the services to which an ISDN device subscribes. The ISDN device uses the SPID when accessing the switch that initializes the connection to a service provider.
TEI---terminal endpoint identifier. In ISDN, a number that identifies a specific connection endpoint within a service access point.
VIC---voice interface card.
WIC---wide-area network (WAN) interface card.
This feature requires specific hardware and software:
This feature is supported on the Cisco 3640 router.
Before you can configure a Cisco 3640 router to provide Modem over ISDN BRI connectivity, you must perform the tasks listed below:
For details about software configuration, see the Cisco IOS Release 12.0 software document, Dial Solutions Configuration Guide. For more information about the physical characteristics of the BRI network modules and their digital modem support, or instructions on how to install the network or modem modules, either see the Cisco 3600 series Network Module Hardware Installation Guide that came with your BRI network module or view the up-to-date information on CCO.
None.
The Modem over ISDN BRI feature is part of interface configuration for BRI. You configure the BRI interface after you have configured the ISDN global characteristics, which are switch type and TEI negotiation timing. These characteristics can also be defined for each BRI interface, as shown in the steps below. For details on the global and interface configuration commands, see the Cisco IOS software document, Dial Solutions Configuration Guide.
To set up the BRI interface characteristics, set the global parameters and then configure each interface separately. Perform the following configuration tasks:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| Router(config)#isdn switch-type switch-type | Configure the global ISDN switch type to match the service provider switch type. For a list of keywords, refer to Table 1. | ||
| Router(config)#isdn tei [first-call | powerup] | Configure when the ISDN Terminal Endpoint Identifier (TEI) negotiation occurs. If this command is not used, negotiation occurs when the router is powered on. The first-call option is primarily used in European ISDN switch types, such as NET3 networks. The powerup option should be used in most other locations. | ||
| Router(config-if)#interface bri slot/port | Enter interface configuration mode to configure parameters for the specified interface. slot is the location of the BRI module. Valid values are from 0 to 3. port is an interface number. Valid values are from 0 to 7 if the module is an eight-port BRI network module, or from 0 to 4 if the module is a four-port BRI network module. | ||
| Router(config-if)#ip address ip-address mask | Specify an IP address and subnet for the interface. You can also specify that there is no IP address. For information about IP addressing, see the IOS software document, Network Protocols Configuration Guide, Part 1. | ||
| Router(config-if)#encapsulation ppp | Enable Point-to-Point Protocol (PPP) encapsulation on the BRI interface. PPP encapsulation is configured for most ISDN communication. If the router needs to communicate with devices that require a different encapsulation protocol, needs to detect encapsulation on incoming calls automatically, or needs to send traffic over a Frame Relay or X.25 network, see the Cisco IOS software document, Dial Solutions Configuration Guide. | ||
| Router(config-if)#dialer map protocol next-hop-address name hostname speed 56|64 dial-string[:isdn-subaddress] | (Optional, Most locations) 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. | ||
| Router(config-if)#dialer-group group-number | (Optional) Assign the interface to a dialer group to control access to the interface. | ||
| Router(config-if)#dialer-list dialer-group list access-list-number | (Optional) Associate the dialer group number with an access list number. | ||
| Router(config-if)#access-list access-list-number {deny | permit} protocol source address source-mask destination destination-mask | (Optional) Define an access list permitting or denying access to specified protocols, sources, or destinations. Permitted packets cause the router to place a call to the destination protocol address. | ||
| Router(config-if)#no ip-directed broadcast | (Optional) Disable the translation of directed broadcast to physical broadcasts. | ||
| Router(config-if)#isdn switch-type switch-type | (Optional) Configure the interface ISDN switch type to match the service provider switch type. The interface ISDN switch type overrides the global ISDN switch type on the interface. For a list of keywords, refer to Table 1. | ||
| Router(config-if)#isdn tei [first-call | powerup] | (Optional) Determine when ISDN TEI negotiation occurs for an individual interface. This overrides the global configuration command. | ||
| Router(config-if)#isdn spid1 spid-number [ldn] | Specify a SPID and local directory number for the B1 channel. Currently, only the DMS-100 and NI-1 switch types require SPIDs. Although the 5ESS switch type might support a SPID, we recommend that you set up that ISDN service without SPIDs. | ||
| Router(config-if)#isdn spid2 spid-number [ldn] | Specify a SPID and local directory number for the B2 channel. | ||
| Router(config-if)#isdn caller number | (Optional) Configure caller ID screening. | ||
| Router(config-if)#isdn answer1 [called-party-number] | (Optional) Configure called-party number verification for a called-party number or subaddress number in the incoming setup message. | ||
| Router(config-if)#isdn calling-number calling-number | (Optional) Specify the calling-party number. | ||
| Router(config-if)#isdn not-end-to-end [56 | 64] | (Optional) Configure the speed for incoming calls not recognized as ISDN end-to-end. | ||
| Router(config-if)#isdn incoming-voice modem | Route incoming voice calls to the modem and treat them as analog data. This step is required for the Modem over ISDN BRI feature. | ||
| Router(config-if)#isdn modem-busy-cause {number | busy | not available} | (Optional) Specify the message that is returned when no modem is available for a call. This command is optional for the Modem over ISDN BRI feature. number is a 1- to 3-digit number. Valid values are from 1 to 127, denoting a Q.931 error cause code. busy specifies that the message will be "USER BUSY" when modems are unavailable. not available specifies that the message will be "CHANNEL NOT AVAILABLE" when modems are unavailable. | ||
| Router(config-if)#isdn fast-rollover-delay seconds | (Optional) Configure a fast rollover delay. | ||
| Router(config-if)#isdn sending-complete | (Optional) Configure the BRI interface to include the Sending Complete information element in the outgoing call Setup message. Used in some geographic locations, such as Hong Kong and Taiwan, where the sending complete information element is required in the outgoing call setup message. |
| Country | ISDN Switch Type | Description |
|---|---|---|
Australia | basic-ts013 | Australian TS013 switches |
Europe | basic-net3 | ETSI ISDN switches (UK and others) |
| basic-nwnet3 | Norwegian NET3 ISDN switches (phase 1, no longer exist, basic-net3 used instead) |
| basic-1tr6 | National German ISDN switches |
| basic-vn2 | National French ISDN switches |
| basic-vn3 | National French ISDN switches |
Japan | ntt | Japanese NTT ISDN switches |
New Zealand | basic-nznet3 | New Zealand NET3 switches (no longer exist, basic-net3 used instead) |
North America | basic-5ess | Custom 5ESS switch |
| basic-dms100 | NT DMS-100 switch |
| basic-ni | National ISDN switches |
To verify the ISDN BRI interface configuration, use the commands demonstrated below. The text shown in bold displays the results of configuration steps such as those shown in the "Configuration Tasks" section.
Step 1 The show running-config command in EXEC mode shows the current configuration running on the terminal. The example below shows some of the command output that is relevant to B RI configuration tasks.
Building configuration... Current configuration: ! version 12.0 no service udp-small-servers service tcp-small-servers ! hostname Router ! enable secret 5 $1$c8xi$tObplXsIS.jDeo43yZgq50 enable password xxx ! username xxxx password x 11x5xx07 no ip domain-lookup ip host Labhost 10.17.12.1 ip host Labhost2 10.17.12.2 ip name-server 10.70.169.21 ! interface Ethernet0 ip address 10.17.12.100 255.255.255.192 no ip mroute-cache no ip route-cache no mop enabled ... interface BRI1/7 description (408) 555-3777 ip address 10.1.1.26 255.255.255.1 no ip directed-broadcast encapsulation ppp no ip route-cache no ip mroute-cache no keepalive shutdown dialer idle-timeout 180 dialer map ip 10.1.1.9 name MDial1 14085550715 dialer map ip 10.1.1.14 name MDial2 14085553775 dialer-group 1 isdn switch-type basic-5ess isdn incoming-voice modem modem-busy-cause busy no fair-queue no cdp enable ppp authentication chap ppp multilink ... ! interface Group-Async1 ip unnumbered Loopback0 no ip directed-broadcast ip tcp header-compression passive async mode interactive peer default ip address pool default no fair-queue group-range 65 70 hold-queue 10 in ! router igrp 109 network 10.21.0.0 ! ip local pool local 10.21.50.85 10.21.50.89 ip local pool default 10.1.1.1 10.1.1.253 ip classless ip route 0.0.0.0 0.0.0.0 10.21.48.1 ! ! map-class dialer VOICE dialer voice-call ! map-class dialer DATA dialer-list 1 protocol ip list 101 tacacs-server host 10.69.2.74 tacacs-server host 10.92.15.197 snmp-server community isdn RW snmp-server enable traps isdn call-information snmp-server host 10.69.3.154 traps isdn
Step 2 The show interfaces bri number command displays information about the physical attributes of the ISDN BRI B and D channels. number is the slot location of the BRI module. Valid values are from 0 to 3.
BRI0:1 is down, line protocol is down
Hardware is BRI
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Internet address is 10.1.1.3/27
Encapsulation PPP, loopback not set, keepalive not set
LCP Closed
Closed: IPCP
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 7 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
The following examples show configuration of just the Modem over ISDN BRI feature using the interface configuration commands for each interface, as well as a complete configuration example showing global configuration, BRI interfaces, and modem configuration.
The example below shows how to configure each BRI interface on a Cisco 3640 router for the Modem over ISDN BRI feature.
interface BRI0/0 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000101 9194440001 isdn spid2 0444001101 9194440011 isdn incoming-voice modem no shut ! interface BRI0/1 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000201 9194440002 isdn spid2 0444001201 9194440012 isdn incoming-voice modem no shut ! interface BRI0/2 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000301 9194440003 isdn spid2 0444001301 9194440013 isdn incoming-voice modem no shut ! interface BRI0/3 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000401 9194440004 isdn spid2 0444001401 9194440014 isdn incoming-voice modem no shut ! interface BRI0/4 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000501 9194440005 isdn spid2 0444001501 9194440015 isdn incoming-voice modem no shut ! interface BRI0/5 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000601 9194440006 isdn spid2 0444001601 9194440016 isdn incoming-voice modem no shut ! interface BRI0/6 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000701 9194440007 isdn spid2 0444001701 9194440017 isdn incoming-voice modem no shut ! interface BRI0/7 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000801 9194440008 isdn spid2 0444001801 9194440018 isdn incoming-voice modem no shut ! interface BRI2/0 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000101 9195550001 isdn spid2 0555001101 9195550011 isdn incoming-voice modem no shut ! interface BRI2/1 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000201 9195550002 isdn spid2 0555001201 9195550012 isdn incoming-voice modem no shut ! interface BRI2/2 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000301 9195550003 isdn spid2 0555001301 9195550013 isdn incoming-voice modem no shut ! interface BRI2/3 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000401 9195550004 isdn spid2 0555001401 9195550014 isdn incoming-voice modem no shut ! interface BRI2/4 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000501 9195550005 isdn spid2 0555001501 9195550015 isdn incoming-voice modem no shut ! interface BRI2/5 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000601 9195550006 isdn spid2 0555001601 9195550016 isdn incoming-voice modem no shut ! interface BRI2/6 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000701 9195550007 isdn spid2 0555001701 9195550017 isdn incoming-voice modem no shut ! interface BRI2/7 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000801 9195550008 isdn spid2 0555001801 9195550018 isdn incoming-voice modem no shut ! !
The example below shows a complete configuration for a dial-in router, including a global command, BRI interface configuration, and modem configuration including group-async and dialer commands.
version 12.0 service timestamps debug datetime localtime service timestamps log uptime no service password-encryption service udp-small-servers service tcp-small-servers ! hostname MBRI_IN ! no logging buffered enable password xxx !
The following lines are used for the ppp chap authentication. Each username and password is associated with one dialer interface.
username async1 password devtest username async2 password devtest username async3 password devtest username async4 password devtest username async5 password devtest username async6 password devtest username async7 password devtest username async8 password devtest username async9 password devtest username async10 password devtest username async11 password devtest username async12 password devtest username async13 password devtest username async14 password devtest username async15 password devtest username async16 password devtest username async17 password devtest username async18 password devtest username async19 password devtest username async20 password devtest username async21 password devtest username async22 password devtest username async23 password devtest username async24 password devtest username async25 password devtest username async26 password devtest username async27 password devtest username async28 password devtest username async29 password devtest username async30 password devtest username FLOYD password devtest username MBRI_OUT password devtest ip subnet-zero no ip domain-lookup ! isdn switch-type basic-5ess ! interface BRI0/0 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000101 9194440001 isdn spid2 0444001101 9194440011 isdn incoming-voice modem no shut ! interface BRI0/1 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000201 9194440002 isdn spid2 0444001201 9194440012 isdn incoming-voice modem no shut ! interface BRI0/2 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000301 9194440003 isdn spid2 0444001301 9194440013 isdn incoming-voice modem no shut ! interface BRI0/3 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000401 9194440004 isdn spid2 0444001401 9194440014 isdn incoming-voice modem no shut ! interface BRI0/4 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000501 9194440005 isdn spid2 0444001501 9194440015 isdn incoming-voice modem no shut ! interface BRI0/5 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000601 9194440006 isdn spid2 0444001601 9194440016 isdn incoming-voice modem no shut ! interface BRI0/6 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000701 9194440007 isdn spid2 0444001701 9194440017 isdn incoming-voice modem no shut ! interface BRI0/7 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0444000801 9194440008 isdn spid2 0444001801 9194440018 isdn incoming-voice modem no shut ! interface BRI2/0 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000101 9195550001 isdn spid2 0555001101 9195550011 isdn incoming-voice modem no shut ! interface BRI2/1 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000201 9195550002 isdn spid2 0555001201 9195550012 isdn incoming-voice modem no shut ! interface BRI2/2 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000301 9195550003 isdn spid2 0555001301 9195550013 isdn incoming-voice modem no shut ! interface BRI2/3 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000401 9195550004 isdn spid2 0555001401 9195550014 isdn incoming-voice modem no shut ! interface BRI2/4 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000501 9195550005 isdn spid2 0555001501 9195550015 isdn incoming-voice modem no shut ! interface BRI2/5 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000601 9195550006 isdn spid2 0555001601 9195550016 isdn incoming-voice modem no shut ! interface BRI2/6 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000701 9195550007 isdn spid2 0555001701 9195550017 isdn incoming-voice modem no shut ! interface BRI2/7 no ip address no ip directed-broadcast encapsulation ppp isdn switch-type basic-ni isdn spid1 0555000801 9195550008 isdn spid2 0555001801 9195550018 isdn incoming-voice modem no shut ! interface Ethernet1/0 ip address 10.18.16.123 255.255.255.192 no ip directed-broadcast no shut !
The section below defines a group-async interface for grouping all the digital modems and configuring them together. Group-async configuration is much easier than configuring all 30 digital modems individually.
interface Group-Async1 ip unnumbered Ethernet3/1 no ip directed-broadcast encapsulation ppp load-interval 30 dialer in-band dialer pool-member 1 async default routing async mode dedicated no peer default ip address no cdp enable ppp authentication chap group-range 96 125 hold-queue 10 in
The following section defines dialer interfaces, associates IP addresses, and sets all the authentication parameters required during the call establishment.
interface Dialer1 ip address 10.1.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async1 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async1 ppp chap password devtest ! interface Dialer2 ip address 10.2.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async2 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async2 ppp chap password devtest ! interface Dialer3 ip address 10.3.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async3 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async3 ppp chap password devtest ! interface Dialer4 ip address 10.4.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async4 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async4 ppp chap password devtest ! interface Dialer5 ip address 10.5.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async5 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async5 ppp chap password devtest ! interface Dialer6 ip address 10.6.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async6 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async6 ppp chap password devtest ! interface Dialer7 ip address 10.7.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async7 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async7 ppp chap password devtest ! interface Dialer8 ip address 10.8.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async8 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async8 ppp chap password devtest ! interface Dialer9 ip address 10.9.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async9 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async9 ppp chap password devtest ! interface Dialer10 ip address 10.10.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async10 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async10 ppp chap password devtest ! interface Dialer11 ip address 10.11.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async11 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async11 ppp chap password devtest ! interface Dialer12 ip address 10.12.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async12 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async12 ppp chap password devtest ! interface Dialer13 ip address 10.13.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async13 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async13 ppp chap password devtest ! interface Dialer14 ip address 10.14.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async14 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async14 ppp chap password devtest ! interface Dialer15 ip address 10.15.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async15 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async15 ppp chap password devtest ! interface Dialer16 ip address 10.16.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async16 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async16 ppp chap password devtest ! interface Dialer17 ip address 10.17.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async17 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async17 ppp chap password devtest ! interface Dialer18 ip address 10.18.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async18 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async18 ppp chap password devtest ! interface Dialer19 ip address 10.19.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async19 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async19 ppp chap password devtest ! interface Dialer20 ip address 10.20.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async20 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async20 ppp chap password devtest ! interface Dialer21 ip address 10.21.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async21 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async21 ppp chap password devtest ! interface Dialer22 ip address 10.22.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async22 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async22 ppp chap password devtest ! interface Dialer23 ip address 10.23.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async23 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async23 ppp chap password devtest ! interface Dialer24 ip address 10.24.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async24 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async24 ppp chap password devtest ! interface Dialer25 ip address 10.25.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async25 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async25 ppp chap password devtest ! interface Dialer26 ip address 10.26.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async26 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async26 ppp chap password devtest ! interface Dialer27 ip address 10.27.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async27 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async27 ppp chap password devtest ! interface Dialer28 ip address 10.28.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async28 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async28 ppp chap password devtest ! interface Dialer29 ip address 10.29.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async29 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async29 ppp chap password devtest ! interface Dialer30 ip address 10.30.0.1 255.255.0.0 no ip directed-broadcast encapsulation ppp dialer remote-name async30 dialer pool 1 dialer-group 1 no cdp enable ppp authentication chap callin ppp chap hostname async30 ppp chap password devtest ! no ip classless
The following lines define routes that send incoming packets out via specific interfaces.
ip route 0.0.0.0 0.0.0.0 10.18.16.193 ip route 10.91.0.1 255.255.255.255 10.1.0.2 ip route 10.91.0.2 255.255.255.255 10.2.0.2 ip route 10.91.0.3 255.255.255.255 10.3.0.2 ip route 10.91.0.4 255.255.255.255 10.4.0.2 ip route 10.91.0.5 255.255.255.255 10.5.0.2 ip route 10.91.0.6 255.255.255.255 10.6.0.2 ip route 10.91.0.7 255.255.255.255 10.7.0.2 ip route 10.91.0.8 255.255.255.255 10.8.0.2 ip route 10.91.0.9 255.255.255.255 10.9.0.2 ip route 10.91.0.10 255.255.255.255 10.10.0.2 ip route 10.91.0.11 255.255.255.255 10.11.0.2 ip route 10.91.0.12 255.255.255.255 10.12.0.2 ip route 10.91.0.13 255.255.255.255 10.13.0.2 ip route 10.91.0.14 255.255.255.255 10.14.0.2 ip route 10.91.0.15 255.255.255.255 10.15.0.2 ip route 10.91.0.16 255.255.255.255 10.16.0.2 ip route 10.91.0.17 255.255.255.255 10.17.0.2 ip route 10.91.0.18 255.255.255.255 10.18.0.2 ip route 10.91.0.19 255.255.255.255 10.19.0.2 ip route 10.91.0.20 255.255.255.255 10.20.0.2 ip route 10.91.0.21 255.255.255.255 10.21.0.2 ip route 10.91.0.22 255.255.255.255 10.22.0.2 ip route 10.91.0.23 255.255.255.255 10.23.0.2 ip route 10.91.0.24 255.255.255.255 10.24.0.2 ip route 10.91.0.25 255.255.255.255 10.25.0.2 ip route 10.91.0.26 255.255.255.255 10.26.0.2 ip route 10.91.0.27 255.255.255.255 10.27.0.2 ip route 10.91.0.28 255.255.255.255 10.28.0.2 ip route 10.91.0.29 255.255.255.255 10.29.0.2 ip route 10.91.0.30 255.255.255.255 10.30.0.2 ip route 10.18.0.0 255.255.0.0 Ethernet3/1 ! dialer-list 1 protocol ip permit ! ! line con 0 exec-timeout 0 0 transport input none
The section below configures the lines associated with the digital modems.
line 96 125 exec-timeout 0 0 modem InOut transport input all stopbits 1 flowcontrol hardware line aux 0 exec-timeout 0 0 line vty 0 4 exec-timeout 0 0 password lab login line vty 5 60 exec-timeout 0 0 password lab login ! end
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 12.0 Command Reference.
To route all incoming voice calls to the modem and treat them as analog data, or to ensure that calls bypass the modems and are treated as digital data, use the isdn incoming-voice interface configuration command. Use the no form of this command to disable the setting.
isdn incoming-voice {data [56 | 64] | modem [56 | 64]}
data | Specifies that incoming voice calls bypass the modems and are handled as digital data. |
modem | Specifies that incoming voice calls are passed over to the digital modems, where they negotiate the appropriate modem connection with the far-end modem. |
56 | Specifies that the bandwidth for this connection is 56 kbps. |
64 | Specifies that the bandwidth for this connection is 64 kbps. If no argument is entered for either the data or modem keywords, the default value is 64. |
isdn incoming-voice data 64
Interface configuration
This command first appeared in Cisco IOS Release 11.1. It became available for BRI interfaces in Cisco IOS Release 12.0(2)XC and Cisco IOS Release 12.0(3)T.
Unless you specify otherwise, all calls received by the router and characterized as voice calls are treated as normal ISDN calls, which are handled as digital data and not passed over to the modem. To establish speedier connections for analog calls to the router, use the isdn incoming-voice command with the modem keyword to have voice calls routed through digital modems (as pulse-code modulated analog data) instead of being treated as digital data.
The following example routes all incoming voice calls through the modem as analog data:
interface BRI 0/0 isdn incoming-voice modem
Use the isdn modem-busy-cause command to specify an error cause code that is returned when all modems in the modem pool are busy and unavailable to accept an incoming call. Use the no form of this command to disable this feature.
isdn modem-busy-cause {number | busy | not available}
number | Specifies an ITU Q.931 standard error cause code of up to three digits, from 1 to 127. |
busy | Specifies that the modem reports "USER BUSY" |
not available | Specifies that the modem returns "CHANNEL NOT AVAILABLE" |
If the command is not used and all modems in the pool are busy, error cause code "21" (call rejected) is sent as the error message.
Interface configuration
This command first appeared in Cisco IOS Release 11.1 when it was available for PRI interfaces. It became available for BRI interfaces in Cisco IOS Release 12.0(2)XC and Cisco IOS Release 12.0(3)T.
Using this command distinguishes call errors due to busy modems from other call errors (for instance, busy B channels) that might return the same ISDN default error code of 21.
The following example configures an error cause code of "47" (resources unavailable) to be returned when no modems in a pool are available:
interface BRI 1/1 isdn modem-busy-cause 47
Posted: Thu Mar 30 17:57:38 PST 2000
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