User manual

Nortel Secure Router 8000 Series
Configuration -WAN Access 4 POS and CPOS interface configuration
Issue 5.3 (
30 March 2009) Nortel Networks Inc. 4-21
Step 3 Choose one of the following commands to configure frame format of the E1/T1 channel as
required.
z
Run the e1 e1-number set frame-format { crc4 | no-crc4 } command to configure frame
format of E1 channel.
z
Run the t1 t1-number set frame-format { esf | sf } command to configure frame format
of T1 channel.
The E1 channel supports the frame format of 4-bit Cyclic Redundancy Check (CRC).
The T1 channel supports Super Frame (SF) and Extended Super Frame (ESF) frame formats.
By default, the frame format of the E1 channel is no-CRC4, and frame format of T1 channel
is ESF.
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4.4.4 Configuring clock mode
When the CPOS interface card on the SR8000 routers and the other devices are connected,
configure the clock mode of the channelized E1/T1 as the master clock mode.
Do as follows on the routers:
Step 1 Run:
system-view
The system view appears.
Step 2 Run:
controller cpos cpos-number
The CPOS interface view appears.
Step 3 Choose one of the following steps to configure clock mode of the E1/T1 channel as required.
z
Run the e1 e1-number set clock { master | slave } command to configure clock mode of
E1 channel.
z
Run the t1 t1-number set clock { master | slave } command to configure clock mode of
T1 channel.
By default, the slave clock mode is the E1/T1 channel.
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4.4.5 Disabling or enabling the E1/T1 channel