Network Router User Manual

4 POS and CPOS interface configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
4-12 Nortel Networks Inc. Issue 5.3 (
30 March 2009)
The system view appears.
Step 2 Run:
interface pos interface-number
The POS interface view appears.
Step 3 Run:
frame-format { sdh | sonet }
The command configures the frame format of the POS interface.
A POS interface supports two types of frame formats.
z
SDH format
z
SONET format
By default, the frame format of POS interface is the SDH format.
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4.2.6 Configuring scramble function
Do as follows on the routers:
Step 1 Run:
system-view
The system view appears.
Step 2 Run:
interface pos interface-number
The POS interface view appears.
Step 3 Run:
scramble
The command configures the scramble function of the POS interface.
A POS interface supports the payload scramble function which can avoid consecutive 1 or 0.
It thus facilitates the receiving terminal to pick up line clock signals.
By default, the payload scramble function is enabled.
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4.2.7 Configuring check word length of CRC
Do as follows on the routers:
Step 1 Run:
system-view
The system view appears.