Cisco 2620 User Manual

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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Chapter3 Configuring with the Command-Line Interface
Configuring T1 (FT1) WAN Interface Cards
Configuring T1 (FT1) WAN Interface Cards
The 1-port T1 and fractional (FT1) WAN interface card includes an integrated data service unit/channel
service unit (DSU/CSU) and can be configured either for full T1 service at 1.544 Mbps or for
fractionalized T1 service. You can configure the interfaces on your T1 WAN interface card manually by
entering Cisco IOS commands on the command line. This method, called configuration mode, provides
the greatest power and flexibility.
Timesaver Before you begin, disconnect all WAN cables from the router to keep it from trying to run the AutoInstall
process. The router tries to run AutoInstall whenever you power it ON, if there is a WAN connection on
both ends and the router does not have a valid configuration file stored in nonvolatile random-access
memory (NVRAM) (for instance, when you add a new interface). It can take several minutes for the
router to determine that AutoInstall is not connected to a remote Transmission Control Protocol/Internet
Protocol (TCP/IP) host.
Before you begin configuring the BRI interface, make sure you:
• Connect a console to the router.
• Power on the router.
Default Configuration
The CiscoIOS software provides the following default configuration for CSU/DSU- and T1-specific
parameters:
service-module t1 clock source line
service-module t1 data-coding normal
service-module t1 timeslots all speed 64
service-module t1 framing esf
Command Purpose
Step1
Router> enable
Password: password
Router#
Enter enable mode. Enter the password.
You have entered enable mode when the prompt
changes to Router#.
Step2
Router# configure terminal
Enter configuration commands, one per line.
End with CNTL/Z.
Router(config)#
Enter global configuration mode. You have
entered global configuration mode when the
prompt changes to Router(config)#.
Step3
Router(config)# voice-card {0-4}
Select the voice card to configure.
Step4
Router(config-voicecard)# codec complexity
{high |medium}
Specify the compression complexity for the voice
card.One complexity type is allowed per router.
Step5
Router(config-voicecard)# exit
Exit back to global configuration mode.
Return to Step 3 if your router has more than one
voice card that you need to configure.
Step6
Router(config)# Ctrl-z
When you finish configuring interfaces, return to
enable mode.

Cisco 2620 Specifications

General

Brand	Cisco
Model	2620
Category	Network Router
Language	English