Command Reference Guide

3Com Router 5000 Family and Router 6000 Family fdl ● 167
Command Reference
fdl
Purpose Use the fdl command to set the behavior of the CT1/PRI interface on the FDL in ESF
framing.
Use the undo fdl command to restore the default.
Syntax fdl { none | ansi | att }
undo fdl
Parameters none
Disables facilities data link (FDL).
ansi
Implements ANSI T1.403 FDL.
att
Implements AT&T TR 54016 FDL.
Default By default, FDL is disabled. You can, however, change the setting depending on the
setting at the far end.
Example Implement AT&T TR 54016 FDL on interface T1 1/0/0.
[3Com -T1 1/0/0] fdl att
View This command can be used in the following views:
■ CT1/PRI Interface view
Description FDL is an embedded 4 kbps overhead channel within the ESF format for transmitting
performance statistics or loopback code.