Nortel Networks 8000 - Manual (Page 73)

4 POS and CPOS interface configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
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.
• SDH format
• SONET format
By default, the frame format of POS interface is the SDH format.
—End
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.
—End
4.2.7 Configuring check word length of CRC
Do as follows on the routers:
Step 1 Run:
system-view
The system view appears.
4-12 Nortel Networks Inc. Issue 5.3 (30 March 2009)