Table Of Contents
1-Port DSU/CSU T1 WIC for the Cisco 1700, Cisco 2600, Cisco 3600, and Cisco 3700 Series Routers
This feature module describes the 1-port data service unit/channel service unit (DSU/CSU) WAN interface card (WIC) for Cisco 1700, 2600, 3600, and 3700 series routers. It describes the benefits of the new feature, supported platforms, configuration, and related documents, and provides command reference information.
This document includes the following sections:
The Cisco WIC-1DSU-T1-V2 is an integrated, managed, T1 or fractional T1 WAN interface card (WIC). It provides nonchannelized data rates of 1 to 24 X 64 kbps or 1 to 24 X 56 kbps and follows ANSI T1.403 and AT&T Publication 62411 standards.
The Cisco WIC-1DSU-T1-V2 interface management features include the following:
•You can remotely configure the interface using Telnet and the Cisco IOS command line interface (CLI).
•For monitoring purposes, the router and DSU/CSU are manageable as a single Simple Network Management Protocol (SNMP) entity, using CiscoWorks or CiscoView. DSU/CSU statistics are accessed from the CLI.
•The SNMP agent supports the standard Management Information Base II (MIB II), Cisco integrated DSU/CSU MIB, and T1 MIB (RFC 1406).
•Loopbacks (including a manual button for a network line loopback) are provided for troubleshooting.
•Transmission attenuation can be tailored to cable length using the CLI.
•Test patterns, alarm counters, and performance reports are accessible using the CLI.
•The module has carrier detect, loopback, and alarm LEDs.
This T1 DSU/CSU card works on the Cisco 1700, 2600, and 3600 series platforms, and allows customers to integrate more peripheral network components into the chassis. This is especially valuable to customers who deploy large scale, end-to-end Cisco-based branch networks.
Other benefits of this solution include the following:
•Fewer devices to deploy and manage
•Simplified management of the router
•DSU/CSU as a single entity
•Remote/local configuration, monitoring, and troubleshooting by using the CLI
•Single vendor support
•Physical space savings
Cisco Interface Card Documentation
Cisco 1700 Series Routers Documentation
Cisco 2600 Series Routers Documentation
Cisco 3600 Series Routers Documentation
Cisco 3700 Series Routers Documentation
Cisco ICS 7750 Documentation
This feature is supported on the following platforms:
•Cisco 1700 series routers
•Cisco 2600XM and Cisco 2691 routers
•Cisco 3631 routers
•Cisco 3700 series routers
•Cisco ICS 7750 communications manager
Determining Platform Support Through Cisco Feature Navigator
Cisco IOS software is packaged in feature sets that are supported on specific platforms. To get updated information regarding platform support for this feature, access Cisco Feature Navigator. Cisco Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.
Cisco Feature Navigator is a web-based tool that enables you to determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image. You can search by feature or release. Under the release section, you can compare releases side by side to display both the features unique to each software release and the features in common.
To access Cisco Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to firstname.lastname@example.org. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and technology releases occur. For the most current information, go to the Cisco Feature Navigator home page at the following URL:
Availability of Cisco IOS Software Images
Platform support for particular Cisco IOS software releases is dependent on the availability of the software images for those platforms. Software images for some platforms may be deferred, delayed, or changed without prior notice. For updated information about platform support and availability of software images for each Cisco IOS software release, refer to the online release notes or, if supported, Cisco Feature Navigator.
Supported Standards, MIBs, and RFCs
No new or modified standards are supported by this feature.
No new or modified MIBs are supported by this feature.
No new or modified RFCs are supported by this feature.
The following are prerequisites to enable the T1 CSU WIC:
•Leased line from your telephone company
•Configuration parameters as specified by your telephone company. For most connections, the following default settings should suffice:
–service-module t1 clock source line
–service-module t1 data-coding normal
–service-module t1 timeslots all speed 64
–service-module t1 framing esf
–service-module t1 lbo none
–service-module t1 linecode b8zs
–no service-module t1 remote-alarm-enable
–no service-module t1 fdl
Note In telephone company initiated loopback tests that use the QRSS test pattern, the WIC-1DSU-T1-V2 must be clocked from the line. Configuring the WIC-1DSU-T1-V2 and the telephone company to use the same clock source will result in errors.
Note To view the current configuration, enter the show service-module serial slot/port command. For further information about these commands and how to change them, refer to the Cisco IOS configuration guides and command references.
See the following sections for configuration tasks for this feature.
Configuring Short Cable Transmission Attenuation
To configure transmission attenuation for short cable lengths (under 660 feet in length), use the following commands beginning in global configuration mode.
Verifying Configuration of Short Cable Transmission Attenuation
To verify the configuration of short cable transmission attenuation, enter the EXEC command show running-config interface serial<slot/port> replacing <slot/port> with the slot and port number of the serial interface. The following sample output shows transmission attenuation for a cable length between 0 and 110 feet:Router#show running-config interface serial0/0Building configuration...Current configuration : 252 bytes!interface Serial0/0no ip addressload-interval 30no keepaliveno fair-queueservice-module t1 cablelength short 110ftservice-module t1 framing sfservice-module t1 linecode amiservice-module t1 timeslots 1-24 speed 56no cdp enableend
Enabling Remote Loopback Testing
To enable remote loopback testing for the WIC, use the following commands beginning in global configuration mode.
Verifying Enabling of Remote Loopback Testing
To verify the loopback status of the current interface, after the far end has been put in loopback mode, enter the command show service-module serial<slot/port> replacing <slot/port> with the slot and port number of the serial interface. The output "Unit is currently in test mode: remote loopback is in progress", as shown in the following example, indicate that remote loopback testing is enabled:Router#show service-module serial0/0Module type is T1/fractionalHardware revision is 0.1, Software revision is 20021210,Image checksum is 0x81277248, Protocol revision is 0.1Receiver has no alarms.Unit is currently in test mode:remote loopback is in progressFraming is SF, Line Code is AMI, Current clock source is line,Fraction has 24 timeslots (56 Kbits/sec each), Net bandwidth is 1344 Kbits/sec.Last module self-test (done at startup): PassedLast clearing of alarm counters 01:52:27loss of signal : 1, last occurred 01:45:24loss of frame : 2, last occurred 01:45:24AIS alarm : 0,Remote alarm : 0,Module access errors : 0,Total Data (last 7 15 minute intervals):255 Line Code Violations, 0 Path Code Violations1 Slip Secs, 326 Fr Loss Secs, 6 Line Err Secs, 0 Degraded Mins2 Errored Secs, 0 Bursty Err Secs, 7 Severely Err Secs, 327 Unavail SecsData in current interval (445 seconds elapsed):0 Line Code Violations, 0 Path Code Violations0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins0 Errored Secs, 0 Bursty Err Secs, 1 Severely Err Secs, 0 Unavail Secs
This section provides a configuration example for a Cis co 1751 router with a WIC-1DSU-T1-V2 card installed. It is in a short cable environment (between 330 and 440 feet here), and is set to enter loopback when a loopback code is received on the line.Current configuration :!version 12.2no parser cacheno service single-slot-reload-enableservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname 1751-uut1!interface Serial0/0ip address 10.0.0.51 255.0.0.0service-module t1 framing esfservice-module t1 linecode b8zsservice-module t1 timeslots 1-12 speed 64service-module t1 data-coding normalservice-module t1 cablelength short 440ftservice-module t1 remote-loopback full!interface FastEthernet0/0ip address 22.214.171.124 255.0.0.0speed autofull-duplex!ip classlessno ip http server!!line con 0line aux 0line vty 0 4login!end
The following new and modified commands are pertinent to this feature. To see the command pages for these commands and other commands used with this feature, go to the Cisco IOS Master Commands List, Release 12.4, at http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124mindx/
•service-module t1 cablelength short
•service-module t1 remote-loopback
© 2005 Cisco Systems, Inc. All rights reserved.