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Command Reference Guide T1 Interface Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 701
framing [d4 | esf]
Use the framing command to configure the framing format for the T1 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 Specifies D4 superframe (SF) format.
esf Specifies extended superframe (ESF) format.
Default Values
By default, the framing format is set to esf.
Applicable Platforms
This command applies to the NetVanta 1000R, 3000, 4000, and 5000 and Total Access 900 Series units.
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