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 the Digital Modem Network Module for the Cisco 3640 Router
Note The values used in this procedure for the framing and linecode commands are examples only. Use the
framing type and line encoding specified by your E1 service provider.
For more information about configuring ISDN PRI on a channelized T1 controller, refer to the
“Configure ISDN PRI” section of the Cisco IOS Release 11.3 Dial Solutions Configuration Guide.
Note Any router configured for ISDN support must be connected to the same switch type on all of its ISDN
interfaces.
Configure the ISDN D-Channel Serial Interfaces
When you configure ISDN PRI on the channelized E1 or channelized T1 controller, you create a
corresponding D-channel serial interface used to carry signaling messages for that PRI group. For E1
serial interfaces, slot/port 0:15 is the D-channel. For T1 modules, serial interface 0:23 is the D-channel.
You must configure this signaling interface to receive incoming and modem calls.
As mentioned, the PRI Network Module for the Cisco 3600 series can have either one or two ports.
Because of this, you might have multiple D-channels to configure.
Configure the ISDN D-Channel Serial Interface for E1 Modules
To configure the ISDN D-channel serial interface for E1 modules, perform the following tasks,
beginning in global configuration mode:
linecode b8zs
Define the line code as binary 8 zero substitution
(B8ZS)
pri-group [timeslots range]
Configure ISDN PRI. This command specifies the
time slots on the T1 line to be allocated to PRI
service.
Command Description
interface Serialslot/port:15
Specify the D-channel of the first PRI line and
switch to the interface configuration mode.
no ip address
Disable IP processing on this interface.
encapsulation ppp
Set the Point-to-Point Protocol (PPP) as the
encapsulation method used by this interface.
isdn incoming-voice modem
Configure all incoming voice calls to go to the
modems.
dialer rotary-group number
Create a rotary dialer group.
dialer-group number
Assign the D-channel interface(s) to the defined
rotary dialer group.
no fair-queue
Disable fair weighted queuing for this interface.

Cisco 2620 Specifications

General

Brand	Cisco
Model	2620
Category	Network Router
Language	English