R3303-HP HSR6800 Routers Interface Command Reference

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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.
You may view the transmitting/receiving state of the FEAC channel by using the display controller t3
command.
Examples
# Enable FEAC channel signal detection on CT3 interface T3 2/0/0.
<Sysname> system-view
[Sysname] controller t3 2/0/0
[Sysname-T3 2/0/0] feac detect
# Send DS3 LOS signal on CT3 interface T3 2/0/0.
<Sysname> system-view
[Sysname] controller t3 2/0/0
[Sysname-T3 2/0/0] feac generate ds3-los
# On CT3 interface T3 2/0/0, send loopback code to the far end to place the far end in a line
loopback.
<Sysname> system-view
[Sysname] controller t3 2/0/0
[Sysname-T3 2/0/0] feac generate loopback ds3-line
frame-format (CT3 interface)
Use frame-format to configure the framing format used by the CT3 interface.
Use undo frame-format to restore the default.
Syntax
frame-format { c-bit | m23 }
undo frame-format
Default
The framing format is C-bit.
Views
CT3 interface view
Default command level
2: System level
Parameters
c-bit: Sets the framing format to C-bit.
m23: Sets the framing format to m23.
Examples
# Set the framing format of interface T3 2/0/0 to m23.
<Sysname> system-view
[Sysname] controller t3 2/0/0
[Sysname-T3 2/0/0] frame-format m23