Loopback (Isdn Bri Interface View) - H3C MSR 20-20 Command Reference Manual

18

loopback (ISDN BRI interface view)

Syntax
View
Parameter
Description
Example
ISDN BRI I
C
OMMANDS
loopback { b1 | b2 | both }
undo loopback
ISDN BRI interface view
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.
Use the loopback
interface in external loopback. This can send data from a line back to the line.
Use the undo loopback
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.
# 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
NTERFACE
command to sets the B1, B2, or both channels on the ISDN BRI
command to restore the default.
C
ONFIGURATION