3Com MSR 50, MSR 30 Isdn BRI Interface Configuration Commands, Loopback Isdn BRI interface view

ISDN BRI INTERFACE CONFIGURATION

18 COMMANDS

loopback (ISDN BRI interface view)

Syntax	loopback { b1 b2 both }
	undo loopback
View	ISDN BRI interface view
Parameter	b1: Places the B1 channel in external loopback.
	b2: Places the B2 channel in external loopback.
	both: Places both B1 and B2 channels in external loopback.
Description	Use the loopback command to sets the B1, B2, or both channels on the ISDN BRI
	interface in external loopback. This can send data from a line back to the line.
	Use the undo loopback command to restore the default.
	By default, loopback is disabled on ISDN BRI interfaces.
c	CAUTION: The modules with loopback-supported ISDN interfaces include 4BS
	(MIM), and 1BS1BU2BS2BU (SIC). In addition, loopback is also supported by the
	fixed ISDN interfaces on your router, if there is any.
Example	# Place the B1 and B2 channels on interface BRI 1/0 in external loopback.
	<Sysname> system-view
	[Sysname] interface bri 1/0
	[Sysname-Bri1/0] loopback both