Configuring a t1 channel, Configuring a t1, Channel – H3C Technologies H3C SR8800 User Manual
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Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter CPOS interface view.
controller cpos cpos-number
N/A
3.
Set the framing format for an 
E1 channel. 
e1 e1-number set frame-format 
{ crc4 | no-crc4 } 
Optional. 
The default is no-CRC4. 
An E1 channel working in 
unframed mode does not support 
framing format setting.
4.
Set the clock mode for an E1 
channel. 
e1 e1-number set clock { master | 
slave } 
Optional. 
The default is slave. 
5.
Set the loopback mode for an 
E1 channel. 
e1 e1-number set loopback { local 
| payload | remote } 
Optional. 
Disabled by default. 
6.
Set the overhead bytes for an 
E1 channel. 
e1 e1-number set flag c2 c2-value 
e1 e1-number set flag j2 { sdh | 
sonet } j2-string 
Optional. 
The default value of C2 is 0x02 (in 
hexadecimal). The initial value (for 
example, the value when the router 
is initially powered on) of J2 is
“SR8800”, but it changes to null 
(the default value) after a change 
in the framing format.
7.
Configure the operating mode 
for an E1 channel. 
•
Configure an E1 channel to 
operate in unframed mode: 
e1 e1-number unframed
•
Configure an E1 channel to 
operate in framed mode and 
perform timeslot bundling to
generate a serial interface
a.
(Optional) undo e1
e1-number unframed
b.
e1 e1-number channel-set
set-number timeslot-list
range
Use either approach. 
By default, the E1 channel 
operates in framed mode. 
8.
Shut down an E1 channel.
e1 e1-number shutdown
Optional. 
By default, an E1 channel is up. 
Configuring a T1 channel
To configure a T1 channel:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter CPOS interface view.
controller cpos cpos-number
N/A