Cisco 3725 Software Configuration Guide - Page 113

Chapter 3 Configuring with the Command-Line Interface Configuring the Digital Modem Network Module for the Cisco 3640 Router linecode b8zs pri-group [timeslots range] Define the line code as binary 8 zero substitution (B8ZS) Configure ISDN PRI. This command specifies the time slots on the T1 line to be allocated to PRI service. 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: Command Description interface Serialslot/port:15 no ip address encapsulation ppp isdn incoming-voice modem Specify the D-channel of the first PRI line and switch to the interface configuration mode. Disable IP processing on this interface. Set the Point-to-Point Protocol (PPP) as the encapsulation method used by this interface. Configure all incoming voice calls to go to the modems. dialer rotary-group number dialer-group number Create a rotary dialer group. Assign the D-channel interface(s) to the defined rotary dialer group. no fair-queue Disable fair weighted queuing for this interface. OL-1957-04 Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers 3-53