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Cisco 3600 Series User Manual

For cisco 3600 series digital modems.
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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.
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.
Benefits
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.
Cisco IOS Release 12.1(5)T
1

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   Summary of Contents for Cisco 3600 Series

  • Page 1: Feature Overview

    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 •...

  • Page 2: Related Documents

    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.

  • Page 3

    There are no configuration tasks. All commands in this feature are existing show modem commands with modified display output. Cisco 3600 series routers require Low Layer Compatability (LLC) information from the Note Telco switch. If you have problems setting up your connection, verify that the Telco switch supports LLC.

  • Page 4: Command Reference

    V.110 Support for Cisco 3600 Series Digital Modems Command Reference 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.

  • Page 5

    V.110 Support for Cisco 3600 Series Digital Modems show modem 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] Syntax Description slot/port (Optional) Specifies the location of a slot and modem port.

  • Page 6

    V.110 Support for Cisco 3600 Series Digital Modems show modem The following display shows output information for the show modem command: Router# show modem Inc calls Out calls Busied Failed Succ Usage Succ Fail Succ Fail Dial Answer Pct. * 1/0...

  • Page 7

    V.110 Support for Cisco 3600 Series Digital Modems show modem Field Description Inc calls Number of incoming calls that successfully and unsuccessfully connected to a modem. Out calls Number of outgoing calls that successfully and unsuccessfully dialed out from an available modem.

  • Page 8

    V.110 Support for Cisco 3600 Series Digital Modems show modem Unavailable fields are marked with dashes (-). Note Router# show modem 1/1 Status Tx/Rx Duration Idle 19200/19200 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"...

  • Page 9

    The type of display output generated from the show modem slot/port command depends on the version of Cisco IOS software running on the router or access server. For example, the following example shows an example output for a 56K modem card, which carries digital modems that transmit at 56 kbps.

  • Page 10

    V.110 Support for Cisco 3600 Series Digital Modems show modem Table 2 describes the fields in the previous four displays, which were created using the show modem slot/port command. This table applies to all modem module types. Table 2 show modem slot/port Field Descriptions...

  • Page 11

    V.110 Support for Cisco 3600 Series Digital Modems show modem Field Description Modem config Current modem configuration, which includes the fields Incoming, Outgoing, Incoming and Outgoing, and Unknown. Protocol Protocol the modem is running such as Normal, Direct, reliable/MNP4, and reliable/LAPM (Link Access Procedure for Modems).

  • Page 12

    V.110 Support for Cisco 3600 Series Digital Modems show modem Field Description Receive Speed Counters List of connection speeds that were received by the modem. Connection Speeds # of A complete summary of possible connection speeds and the actual number connections of connections that occurred at those speeds.

  • Page 13

    11.2 This command was introduced. 12.1(5)T This command was modified to show display output for Cisco 3600 series digital modems that support V.110. Examples The following example shows a portion of the output display when using the show modem log command.

  • Page 14

    V.110 Support for Cisco 3600 Series Digital Modems show modem log 189 ppp packets tx, 129 ppp packets rx, 14 ppp packets rx bad 0 ec packets tx, 0 ec packets rx, 0 ec packets rx bad 0 v110 packets tx, 0 v110 packets rx, 0 v110 packets rx bad, 0 v110 sync loss...

  • Page 15

    Modification 11.2P This command was introduced. 12.1(5)T This command was modified to show output display for Cisco 3600 series digital modems that support V.110. Examples The following example shows the display output when using the show modem configuration command. A specific modem, 0/0, has been designated. V.110 information is highlighted in this example.

  • Page 16

    V.110 Support for Cisco 3600 Series Digital Modems show modem configuration S22 = 0 ARA Error Correction is disabled S23 = 1 V.42 Error Correction enabled S24 = 1 MNP Error Correction enabled S25 = 0 Link Protocol Fallback to Async framing...

  • Page 17

    If you want to see a snapshot of higher baud rates, specify a higher connection speed. The Cisco IOS software rounds up the max-speed variable to the nearest recognizable baud rate, so you do not need to memorize or enter exact connection speeds. For example, if you enter a maximum baud rate of 22059, the system software automatically rounds the value up to 24000.

  • Page 18

    2,400 to 21,600 bps show modem connect-speeds 1200 75 to 1200 bps The Cisco IOS software does not accept commas (,) in the connect speed field. For Note example, enter 28000 not 28,000. The show modem connect-speeds command displays a log of connection speed statistics starting from the last time the access servers or router was power cycled or the clear modem counters command was issued.

  • Page 19

    V.110 Support for Cisco 3600 Series Digital Modems show modem connect-speeds Tot % Router# show modem connect-speeds ? <12000-64000> Max baud connect speed to display to Output modifiers <cr> Router# show modem connect-speeds 12000 ? <0-3> Slot number Output modifiers <cr>...

  • Page 20

    V.110 Support for Cisco 3600 Series Digital Modems show modem connect-speeds * 1/22 * 1/23 1546 Tot % receive connect speeds 9600 12000 14400 16800 19200 21600 24000 26400 28800 TotCnt * 1/0 * 1/1 * 1/2 * 1/5 * 1/6...

  • Page 21

    V.110 Support for Cisco 3600 Series Digital Modems show modem connect-speeds 1/23 Tot % Table 4 describes of the fields shown in the previous display examples. Table 4 show modem connect-speeds Field Descriptions Field Description transmit connect speeds Connection speeds for calls initiated by the system.

  • Page 22

    To display performance statistics for individual modems, use the show modem operational-status user EXEC and privileged EXEC command. Cisco AS2600, Cisco AS3600 series, Cisco AS5200, and Cisco AS5300 series access servers show modem operational-status [slot/port] Cisco AS5800 series access servers...

  • Page 23

    V.110 Support for Cisco 3600 Series Digital Modems show modem operational-status Examples Router# show modem operational-status 0/0 Modem (0/0) Operational Status: Parameter #0 Disconnect Reason Info: (0x0) Type (=0 ): <unknown> Class (=0 ): Other Reason (=0 ): no disconnect has yet occurred...

  • Page 24

    V.110—ITU-T standard for support by ISDN of Data Terminal Equipment (DTE) with V-series type interfaces. Note For a list of other internetworking terms, see the Internetworking Terms and Acronyms document available on the Documentation CD-ROM and Cisco Connection Online (CCO) at the following URL: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ita/index.htm. Cisco IOS Release 12.1(5)T...

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