Specifications

T1 Interface Configuration Command Set Command Reference Guide

framing [ d4 | esf ]

Use the framing command to configure the framing format for the T1 or DSX-1 interface. This parameter

should match the framing format supplied by your network provider. Use the no form of this command to

return to the default value.

Syntax Description

D4 superframe format (SF)

esf

Extended SF

Default Values

<format> esf

Command Modes

(config-t1 1/1)# T1 or DSX-1 Interface Configuration Mode required.

(config-t1 1/2)#

Command History

Release 1.1 Command was introduced

Functional Notes

A frame is comprised of a single byte from each of the T1’s timeslots; there are 24 timeslots on a single T1

circuit. Framing bits are used to separate the frames and indicate the order of information arriving at the

receiving equipment. D4 and ESF are two methods of collecting and organizing frames over the circuit.

Usage Examples

The following example configures the T1 interface for D4 framing:

(config)#

interface t1 1/1

(config-t1 1/1)#

framing d4