R0106-HP MSR Router Series Interface Configuration Guide(V7)

31
Step Command Remarks
22. (Optional.) Restore the default
settings for the T1-F interface.
default N/A
23. Bring up the T1-F interface.
undo shutdown By default, a T1-F interface is up.
Starting a BERT test on a T1-F interface
BERT operates as follows:
1. The local end sends out a pattern, which is looped over on the line and sent back to the local end.
2. The local end checks the received pattern for the bit error rate to help determine the line condition.
You must configure loopback to allow the transmitted pattern to loop back from a specific point on the
line. For example, enable far-end loopback on the remote interface.
To start/terminate a BERT test on a T1-F interface:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter T1-F interface view.
interface serial interface-number N/A
3. Start a BERT test.
ft1 bert pattern { 2^20 | 2^15 }
time minutes [ unframed ]
By default, no BERT test is
performed.
4. (Optional.) Verify the state and
result of the BERT test.
display ft1 [ serial
interface-number ]
N/A
Displaying and maintaining T1-F interfaces
Execute display commands in any view and reset commands in user view.
Task Command
Display information about T1-F interfaces. display ft1 [ serial interface-number ]
Display the status of a T1-F interface. display interface serial interface-number
Clear statistics for T1-F interfaces. reset counters interface [ serial [ interface-number ] ]
Configuring a CE3 interface
E3 belongs to the digital carrier system of ITU-T. It transmits data at 34.368 Mbps and adopts HDB3 as
the line code format.
A CE3 interface can operate in either E3 or CE3 (the default) mode.
• In E3 mode, a CE3 interface provides 34.368 Mbps of data bandwidth. No timeslots are divided.
The system automatically creates a synchronous serial interface numbered serial
number/line-number/0:0 for it.
• In CE3 mode, a CE3 interface can demultiplex 16 channels of E1 signals in compliance with ITU-T
G.751 and G.742. Each E1 line can be divided into 32 timeslots numbered 0 to 31. Timeslot 0 is for