Version 7.2 783 Mediant 500L Gateway & E-SBC
User's Manual 43. Channel Maintenance
43 Channel Maintenance
This chapter describes various channel-related maintenance procedures.
43.1 Disabling Analog Ports
You can disable an analog port (FXS or FXO). When disabled, the port cannot be used and
signaling is not transmitted through the port. The port's LED is lit red. By default, all analog
ports are enabled.
To disable an analog port through CLI:
(config-voip)# interface fxs-fxo
(fxs-fxo)# analog-port-enable <module>/<port> [on|off]
For example, to disable Port 2 on Module 1:
(fxs-fxo)# analog-port-enable 1/2 off
43.2 Resetting an Analog Channel
You can reset an analog (FXO or FXS) channel. This is sometimes useful, for example,
when the device (FXO) is connected to a PBX and communication between the two cannot
be disconnected (e.g., when using reverse polarity).
To reset an analog channel through the Web interface:
6. Open the Monitor home page (Monitor menu > ).
7. Click the required FXS or FXO port icon; a shortcut menu appears.
8. From the shortcut menu, choose Reset Channel; a message appears informing you
when the channel has reset.
43.3 Restarting a B-Channel
You can restart a specific B-channel belonging to an ISDN trunk, using the SNMP MIB
variable, acTrunkISDNCommonRestartBChannel. This may be useful, for example, for
troubleshooting specific voice channels.
Note:
• If a voice call is currently in progress on the B-channel, it is disconnected when the
B-channel is restarted.
• B-channel restart can only be done if the D-channel of the trunk to which it
belongs is synchronized (Layer 2).
• B-channel restart does not affect the B-channel's configuration.
43.4 Locking and Unlocking Trunk Groups
You can lock a Trunk Group to take its trunks (and their channels) out of service. When
you initiate a lock, the device rejects all new incoming calls for the Trunk Group and
immediately terminates active calls (busy channels), eventually taking the entire Trunk
Group out of service.
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