3Com MSR 50, MSR 30 manual POS Interface Configuration Commands, Crc, Syntax crc 16 Undo crc

POS INTERFACE CONFIGURATION

7 COMMANDS

clock

Syntax	clock { master slave }
	undo clock
View	POS interface view
Parameter	master: Sets the clock mode of the POS interface to master.
	slave: Sets the clock mode of the POS interface to slave.
Description	Use the clock command to set the clock mode of the POS interface.
	Use the undo clock command to restore the default, that is, slave.
	POS interfaces support two clock modes:
	■ Master, which uses internal clock signal.
	■ Slave, which uses line clock signal.
	Similar to the DTE/DCE model of synchronous serial interfaces, POS interfaces
	need to choose a clock mode. When a POS interface on the router is directly
	connected to another router, the only requirement is that the two sides use
	different clock modes. In connection to a switch, however, the switch is DCE and
	uses internal clock, so the POS interface is DTE and must adopt the slave clock
	mode.
Example	# Set the clock mode of interface POS 1/0 to master.
	<Sysname> system-view
	[Sysname] interface pos 1/0
	[Sysname-Pos1/0] clock master

crc

Syntax crc { 16 32 }

undo crc

View POS interface view