Cisco Systems 3600 User Manual 4

V.110 Support for Cisco 3600 Series Digital Modems

This feature implements the V.110 protocol on Cisco digital modem network modules (NM-6DM, NM-12DM, NM-18DM, NM-24DM, and NM-30DM) for the Cisco 3600 series of routers, and provides V.110 support for digital modems connected over BRI or PRI interfaces.

This document contains the following sections:

• Feature Overview, page 1

• Supported Platforms, page 2

• Supported Standards, MIBs, and RFCs, page 2

• Command Reference, page 4

• Glossary, page 24

Feature Overview

V.110 is a real-time method of encapsulating varying data rates and the associated RS-232 signals into a 64-Kbps ISDN B-channel. Using this procedure, asynchronous data rates from 600 bps to 38.4 Kpbs can be transparently rate-adapted over a single 64-Kbps channel.

Benefits

V.110 is useful for transporting data over GSM-type mobile phones. V.110 over ISDN support is being added to the MARS platform to support digital modems in many countries which use E1 with ISDN.

V.110, as an alternative to V.120, is a method of ISDN rate adaption. It provides DTEs with V-series type interfaces with access to ISDN networks by bit stuffing. Many V.110 devices are used in Europe and Japan.

The V.110 recommendation of the ITU-T rate adapts a low-speed connection to an ISDN B-channel, allowing the remote station or terminal adapter to use the fast call-setup times offered by ISDN. This feature enables Global System for Communications (GSM) wireless connectivity.

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Supported Platforms

Restrictions

• The BRI interface with V.110 is not supported by the Cisco 3620 router.

• Cisco 3600 series routers require Low Layer Compatability (LLC) information from the Telco

switch.

Supported Standards, MIBs, and RFCs

Standards

ITU-T Recommendation V.110

MIBs

No new or modified MIBs are supported by this feature.

To obtain lists of MIBs supported by platform and Cisco IOS release and to download MIB modules, go to the Cisco MIB web site on Cisco Connection Online (CCO) at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

No new or modified RFCs are supported by this feature.

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V.110 Support for Cisco 3600 Series Digital Modems

Configuration Tasks

There are no configuration tasks. All commands in this feature are existing show modem commands with modified display output.

Note Cisco 3600 series routers require Low Layer Compatability (LLC) information from the

Telco switch. If you have problems setting up your connection, verify that the Telco switch supports LLC.

Configuration Tasks

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Command Reference

No new commands were added for this feature. However, the output for the following commands was modified to include V.110 information. All other commands used with this feature are documented in the Cisco IOS Release 12.1 command reference publications.

• show modem

• show modem log

• show modem configuration

• show modem connect-speeds

• show modem operational-status

V.110 Support for Cisco 3600 Series Digital Modems

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V.110 Support for Cisco 3600 Series Digital Modems

show modem

To display a high-level performance report for all modems or a single modem, use the show modem EXEC command.

show modem [slot/port | group number]

show modem

Syntax Description

slot/port (Optional) Specifies the location of a slot and modem port. Remember to

include the forward slash (/) when entering this variable.

group number (Optional) Specifies a modem group to which a specified modem belongs.

The group number range is 1 to 200.

Defaults There are no default behaviors or values for this command.

Command Modes EXEC

Command History

Release Modification

11.2 This command was introduced.

12.1(5)T This command was modified to show the output display indicating V.110 support on Cisco 3600 series platforms.

Examples

Router# show modem

Codes: * - Modem has an active call R - Modem is being Reset D - Download in progress B - Modem is marked bad and cannot be used for taking calls b - Modem is either busied out or shut-down

Avg Hold Inc calls Out calls Busied Failed No Succ Mdm Time Succ Fail Succ Fail Out Dial Answer Pct. * 0/0 00:21:01 132 0 0 0 0 0 0 100% * 0/1 2d01h 1 0 0 0 0 0 0 100% 0/2 00:00:34 130 0 0 0 0 0 0 100% * 0/3 00:21:53 126 1 0 0 0 0 0 99% * 0/4 2d01h 1 0 0 0 0 0 0 100% 0/5 00:00:33 131 0 0 0 0 0 0 100% * 0/6 00:21:12 131 0 0 0 0 0 0 100% 0/7 00:00:34 131 0 0 0 0 0 0 100% b 0/8 00:00:00 0 0 0 0 0 0 0 0% b 0/9 00:00:00 0 0 0 0 0 0 0 0% !. !. !. b 0/29 00:00:00 0 0 0 0 0 0 0 0% Total: 00:18:25 783 1 0 0 0 0 0 99%

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show modem

V.110 Support for Cisco 3600 Series Digital Modems

The following display shows output information for the show modem command:

Router# show modem Inc calls Out calls Busied Failed No Succ Mdm Usage Succ Fail Succ Fail Out Dial Answer Pct. * 1/0 17% 74 3 0 0 0 0 0 96% * 1/1 15% 80 4 0 0 0 1 1 95% * 1/2 15% 82 0 0 0 0 0 0 100% 1/3 21% 62 1 0 0 0 0 0 98% 1/4 21% 49 5 0 0 0 0 0 90% * 1/5 18% 65 3 0 0 0 0 0 95% * 1/6 19% 58 2 0 0 0 0 0 96% * 1/7 17% 67 5 0 0 0 1 1 93% * 1/8 20% 68 3 0 0 0 0 0 95% 1/9 16% 67 2 0 0 0 0 0 97% 1/10 18% 56 2 0 0 0 1 1 96% * 1/11 15% 76 3 0 0 0 0 0 96% * 1/12 16% 62 1 0 0 0 0 0 98% 1/13 17% 51 4 0 0 0 0 0 92% 1/14 16% 51 5 0 0 0 0 0 91% 1/15 17% 65 0 0 0 0 0 0 100% 1/16 15% 73 3 0 0 0 0 0 96% 1/17 17% 67 2 0 0 0 0 0 97% 1/18 17% 61 2 0 0 0 0 0 96% * 1/19 17% 74 2 0 0 0 0 0 97% 1/20 16% 65 1 0 0 0 0 0 98% * 1/21 16% 58 3 0 0 0 0 0 95% * 1/22 18% 56 4 0 0 0 0 0 93% * 1/23 20% 60 4 0 0 0 0 0 93%

Table 1 describes the fields shown in the previous displays of the show modem command.

Ta b le 1 s h ow mo d e m Field Descriptions

Field Description

Mdm Slot and modem port number. Also, the following modem states can appear

to the left of a slot/modem port number:

• b—Modem was removed from service with the modem shutdown

command or the modem busyout command.

• B—Modem is suspected to be inoperable or bad. No calls can be made

with this modem. The letter B can also mean that a modem firmware download failed for the specified modem. In this case, try unmarking the modem as bad with the no modem bad command and upgrading the modem firmware.

• d—The RAM-based DSP code, which supports K56flex, is not

configured. The modem will revert to transmitting at 33.6 kbps.

• D—Modem is currently downloading firmware.

• p—Firmware download is pending, typically because one or more

modems is active.

• R—Modem is held and isolated in a suspended state by the modem

hold-reset command.

• T—Modem is conducting a back-to-back test with another modem.

• *—Modem is connected or dialing.

Usage Percentage of the total system uptime that all modems are in use.

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Field Description

Inc calls Number of incoming calls that successfully and unsuccessfully connected

Out calls Number of outgoing calls that successfully and unsuccessfully dialed out

Busied Out Number of modems that have been manually removed from service.

Failed Dial Number of modems that attempted to dial into the network but failed to

No Answer Number of modems that detected an incoming ring but failed to answer the

Succ Pct. Successful connection percentage of total available modems.

The following example shows the statistics and current configurations for the manageable modem 2/10. A dash (-) indicates a field that is not available on basic modems. An x indicates a field that is available and active on manageable modems. See Table 2 for a description of the fields displayed by the show modem command.

Router> show modem 2/10 Mdm Typ Status Tx/Rx G Duration TX RX RTS CTS DSR DCD DTR 2/10 V34 Idle 33600/33600 1 00:00:00 x x x x

Modem 2/10, Microcom MNP10 V34 Modem (Select), Async35, TTY35 Firmware (Boot) Rev: 2.1(9) (1.0(5)) Modem config: Incoming and Outgoing Protocol: reliable/MNP, Compression: V42bis Management port config: Status polling and AT session Management port status: Status polling and AT session TX signals: 0 dBm, RX signals: 0 dBm

Last clearing of "show modem" counters never 0 incoming completes, 0 incoming failures 0 outgoing completes, 0 outgoing failures 0 failed dial attempts, 0 ring no answers, 0 busied outs 0 no dial tones, 0 dial timeouts, 0 watchdog timeouts 0 no carriers, 0 link failures, 0 resets 0 recover oob 0 protocol timeouts, 0 protocol errors, 0 lost events

Connection Speeds 75 300 600 1200 2400 4800 # of connections 0 0 0 0 0 0 Connection Speeds 7200 9600 12000 14400 16800 19200 # of connections 0 0 0 0 0 0 Connection Speeds 21600 24000 26400 28800 31200 33600 # of connections 0 0 0 0 0 1

show modem

to a modem.

from an available modem.

make a connection.

call.

The following is an output example for a basic V.34 modem module:

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show modem

V.110 Support for Cisco 3600 Series Digital Modems

Note Unavailable fields are marked with dashes (-).

Router# show modem 1/1 Mdm Typ Status Tx/Rx G Duration TX RX RTS CTS DSR DCD DTR 1/1 - Idle 19200/19200 0 00:01:05 - - - - - - -

Modem 1/1, AS5200 Non-Manageable Modem Firmware (Boot) Rev: Unknown Modem config: Unknown Management config: Not Manageable Modem

Last clearing of "show modem" counters never

- incoming completes, - incoming failures

- outgoing completes, - outgoing failures, 0 failed dial attempts, 0 ring no answers, 0 busied outs 0 no dial tones, 0 dial timeouts, 0 watchdog timeouts

- no carriers, - link failures, 0 resets

- protocol timeouts, - protocol errors, - lost events

Connection Speeds 75 300 600 1200 2400 4800 # of connections 0 0 0 0 0 0 Connection Speeds 7200 9600 12000 14400 16800 19200 # of connections 0 0 0 0 0 0 Connection Speeds 21600 24000 26400 28800 31200 33600 # of connections 0 0 0 0 0 0

The following display shows output information for the show modem slot/port command for V.110 modem cards:

Router# show modem 0/1 Mdm Typ Status Tx/Rx G Duration TX RX RTS CTS DSR DCD DTR 0/1 Idle -/- 1 00:00:00 - - - - - - -

Modem 0/1, V.110 Terminal Adaptor (Unmanaged), Async2, TTY2 Firmware (Boot) Rev: Unmanaged (Unmanaged) Modem config: Incoming and Outgoing Management config: Unmanaged

Last clearing of "show modem" counters never

- incoming completes, - incoming failures

- outgoing completes, - outgoing failures 0 failed dial attempts, 0 ring no answers, 0 busied outs

- no dial tones, - dial timeouts, 0 watchdog timeouts

- no carriers, - link failures, 0 resets, - recover oob

- protocol timeouts, - protocol errors, - lost events

Connection Speeds 75 300 600 1200 2400 4800 # of connections - - - - - Connection Speeds 7200 9600 12000 14400 16800 19200 # of connections - - - - - Connection Speeds 21600 24000 26400 28800 31200 32000 # of connections - - - - - Connection Speeds 33600 34000 36000 38000 40000 42000 # of connections - - - - - Connection Speeds 44000 46000 48000 50000 52000 54000 # of connections - - - - - Connection Speeds 56000 # of connections -

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Cisco Systems 3600 User Manual 4

Specifications and Main Features

Frequently Asked Questions

User Manual

Feature Overview

Benefits

Supported Platforms

Restrictions

Related Documents

Supported Standards, MIBs, and RFCs

Configuration Tasks

Command Reference

show modem