ADTRAN Stub Routing Spezifikationen PDF herunterladen (Seite 337)

100

101

Command Reference Guide T1 Interface Configuration Command Set

fdl [ ansi | att | none ]

Use the fdl command to configure the format for the facility data link channel on the T1 circuit. FDL

channels are only available on point-to-point circuits. Use the no form of this command to return to the

default value.

Syntax Description

ansi

Configures the FDL for ANSI T1.403 standard

att

Configures the FDL for ATT TR54016 standard

none

No FDL available on this circuit

Default Values

<format> ansi

Command Modes

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

Command History

Release 1.1 Command was introduced

Functional Notes

T1 circuits using ESF framing format (specified using the

framing

command) reserve 12 bits as a data link

communication channel, referred to as the Facility Data Link (FDL), between the equipment on either end of

the circuit. The FDL allows the transmission of trouble flags such as the Yellow Alarm signal. See

framing [ d4

| esf ]

on page 338 for related information.

Usage Examples

The following example disables the FDL channel for the T1 circuit:

(config)#

interface t1 1/1

(config-t1 1/1)#

fdl none

1 2 ... 332 333 334 335 336 337 338 339 340 341 342 ... 567 568

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