49 Resetting Channels
49.1 Resetting an Analog Channel
You can inactivate (reset) an FXO or FXS analog channel. This is sometimes useful, for
example, when the device (FXO) is connected to a PBX and the communication between
the two can't be disconnected (e.g., when using reverse polarity). This is done in the Web
interface's Home page.
 To reset an analog channel:
1. Open the Home page.
2. Click the required FXS or FXO port icon; a shortcut menu appears.
3. From the shortcut menu, choose Reset Channel; the channel is changed to inactive
and the port icon is displayed in gray.
49.2 Restarting a B-Channel
You can restart a specific B-channel belonging to an ISDN or CAS trunk, using the SNMP
MIB variable, acTrunkISDNCommonRestartBChannel or the EMS management tool (refer
to the EMS User's Manual). This may be useful, for example, for troubleshooting specific
voice channels.
Notes:
• 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.
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