R2511-HP MSR Router Series Interface Command Reference(V5)

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Use undo e1 set frame-format to restore the default.
Syntax
e1 e1-number set frame-format { crc4 | no-crc4 }
undo e1 e1-number set frame-format
Default
The framing format of an E1 channel is no-CRC4.
Views
CPOS interface view
Default command level
2: System level
Parameters
e1-number: Number of an E1 channel on the CPOS interface, in the range of 1 to 63.
crc4: Sets the framing format to CRC4.
no-crc4: Sets the framing format to no-CRC4.
Examples
# Set E1 channel 1 to use the framing format CRC4.
<Sysname> system-view
[Sysname] controller cpos 1/0
[Sysname-Cpos1/0] e1 1 set frame-format crc4
e1 set loopback
Use e1 set loopback to set the loopback mode of the E1 channel.
Use undo e1 set loopback to disable loopback.
Syntax
e1 e1-number set loopback { local | payload | remote }
undo e1 e1-number set loopback
Default
Loopback is disabled.
Views
CPOS interface view
Default command level
2: System level
Parameters
e1-number: Number of an E1 channel on the CPOS interface, in the range of 1 to 63.
local: Enables internal loopback on the E1 channel.
payload: Enables external payload loopback on the E1 channel.
remote: Enables external loopback on the E1 channel.