R3303-HP HSR6800 Routers Interface Command Reference

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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 2/0/0
[Sysname-Cpos2/0/0] e1 1 set frame-format crc4
e1 set loopback
Use e1 set loopback to configure 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.
Usage guidelines
You can test E1 channels by using the loopback command with different keywords.
In an internal loopback, data of the sender is directly looped to the receiver.
In an external payload loopback, data received by the receiver is looped back at the E1 framer as
payload.
In an external loopback, data received by the receiver is looped back directly without passing through
the E1 framer.
Examples
# Enable external payload loopback on E1 channel 1.
<Sysname> system-view
[Sysname] controller cpos 2/0/0
[Sysname-Cpos2/0/0] e1 1 set loopback payload
Related commands
display controller cpos e1