interface serial

To specify a serial interface created on a channelized E1 or channelized T1 controller (for ISDN PRI, channel-associated signaling, or robbed-bit signaling), use the interface serial global configuration command.

interface serial slot/port:timeslot   (on the Cisco 7200 and Cisco 7500 series)
interface serial number:timeslot   (on the Cisco AS5200 and Cisco 4000 series)

Syntax Description

slot/port	Slot number and port number where the channelized E1 or T1 controller is located.
number	Channelized E1 or T1 controller number.
timeslots	For ISDN, the D channel timeslot, which is :23 channel for channelized T1 and the :15 for channelized E1. PRI timeslots are in the range 0 to 23 for channelized T1 and in the range 0 to 30 for channelized E1. For channel-associated signaling or robbed-bit signaling, the channel group number. The colon (:) is required. On a dual port card, it is possible to run channelized on one port and primary rate on the other port.

Default

None

Command Mode

Global configuration

Usage Guidelines

The D channel is always the :23 channel for T1 and the :15 for E1.

Examples

This command first appeared prior to Release 10.0.

The following example configures channel groups on timeslots 1 to 11 and ISDN PRI on timeslots 12 to 24 of T1 controller 0. Then the examples configures the first two channel groups as serial interfaces 0:0 and 0:1.

 controller t1 0 
 channel-group 0 timeslot 1-6 
 channel-group 1 timeslot 7 
 channel-group 2 timeslot 8 
 channel-group 3 timeslot 9-11 
 pri-group timeslots 12-24
 !
 interface serial 0:0
 ip address 131.108.13.2 255.255.255.0
 encapsulation ppp
 !
 interface serial 0:1
 ip address 131.108.13.3 255.255.255.0
 encapsulation ppp
  

 

The following example configures ISDN PRI on T1 controller 4/1 and then configures the D channel on the resulting serial interface 4/1:23:

 controller    t1 4/1
   framing crc4
   linecode hdb3
   pri-group timeslots 1-24
   interface serial 4/1:23
   ip address 131.108.13.1 255.255.255.0
   encapsulation ppp
  

Related Commands

You can use the master indexes or search online to find documentation of related commands.

circuit
controller
show interfaces
show interfaces serial bchannel