3Com MSR 30, MSR 50 manual E1 set clock

678CHAPTER 45: CPOS INTERFACE CONFIGURATION COMMANDS

[Sysname-Cpos1/0] quit

[Sysname] interface serial 1/0/63:1

[Sysname-Serial1/0/63:1]

e1 set clock

Syntax e1 e1-numberset clock { master slave }

undo e1 e1-numberset clock

View CPOS interface view

Parameter 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.

Description 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.

Example # 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 set frame-format

Syntax e1 e1-numberset frame-format { crc4 no-crc4 } undo e1 e1-numberset frame-format

View CPOS interface view

Parameter 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.