3com MSR 20-20 참조 매뉴얼

C

HAPTER

 45: CPOS I

NTERFACE

 C

ONFIGURATION

 C

OMMANDS

[Sysname-Cpos1/0] quit

[Sysname] interface serial 1/0/63:1

[Sysname-Serial1/0/63:1] 

e1 e1-number set clock { master | slave }

undo e1 e1-number set clock

CPOS interface view

e1-number: Number of an E1 channel on the CPOS interface, in the range 1 to 63.

master: Sets the clock mode of the E1 channel to master.

slave: Sets the clock mode of the E1 channel to slave.

Use the e1 set clock command to set the clock mode of the E1 channel.

Use the undo e1 set clock command to restore the default, that is, slave.

E1 channels on the same CPOS physical interface can use different clock modes, 
depending on connected devices. For example, when connected to a SONET/SDH 
device, an E1 channel should use the slave clock mode, and when directly 
connected to another device with fiber-optic, it can use either mode so long as the 
mode is different from the one used at the opposite end.

Note that different E1 channels of the same CPOS physical interface are 
independent of one another in terms of clock mode.

# Set the clock mode of E1 channel 1 to master.

<Sysname> system-view

[Sysname] controller cpos 1/0

[Sysname-Cpos1/0] e1 1 set clock master 

e1 e1-number set frame-format { crc4 | no-crc4 }

undo e1 e1-number set frame-format

CPOS interface view

e1-number: Number of an E1 channel on the CPOS interface, in the range 1 to 63.

crc4: Sets the framing format to CRC4.

no-crc4: Sets the framing format to no-CRC4.