Command Reference Guide

3Com Router 5000 Family and Router 6000 Family feac (CT3 Interface) ● 115
Command Reference
On CT3 interface 1/0/0 send loopback code to the far end and disable far-end
payload loopback.
<3Com > system-view
[3Com ] interface t3 1/0/0
[3Com -T3 1/0/0] undo feac generate loopback ds3-payload
View This command can be used in the following views:
■ CT3 Interface view
Description FEAC is a channel formed by using the third C-bit in the first subframe in C-bit
framing. It is used to transmit alarm state signals for line test purpose or to transmit
loopback control code for activating or deactivating far-end loopback during a
loopback test.
According to ANSI T1.107a, the frame format used by FEAC channels is bit oriented
protocol (BOP).
At the startup of your router, FEAC channel signal detection is enabled on the CT3
interface with FEAC signal sending disabled.
After far-end loopback is enabled with the feac generate loopback { ds3-line
| ds3-payload } command, you may disable it with the undo form of the command.
Disable FEAC detection before you configure far-end loopback to prevent loopback
deadlock, which may happen when the local end enables loopback after detecting
the loopback code sent back by the far end.
Related Command display controller t3