Version 6.6 277 Mediant 800 MSBR
User's Manual 23. Digital PSTN
23 Digital PSTN
This section describes the configuration of the public switched telephone network (PSTN)
related parameters.
23.1 Configuring Trunk Settings
The Trunk Settings page allows you to configure the device's trunks. This includes
selecting the PSTN protocol and configuring related parameters. This page also provides
the following features:
Taking a Trunk Out of Service: Some parameters can be configured when the trunk
is in service, while others require you to take the trunk out of service. This is done by
clicking the Stop button. Once you have "stopped" a trunk, all current calls are
dropped and no new calls can be made on the trunk.
Deactivating a Trunk: You can deactivate a trunk for maintenance. This is done by
clicking the Deactivate button. Deactivation temporarily disconnects
(logically) the trunk from the PSTN network. Upon trunk deactivation, the device
generates an AIS alarm on the trunk to the far-end. As a result, an RAI alarm signal
may be received by the device. A subsequent trunk activation, done by clicking the
Activate button, reconnects the trunk to the PSTN network and clears
the AIS alarm. Trunk deactivation is typically used for maintenance such as checking
the trunk's physical integrity.
Creating a Loopback Line: You can create (and remove) remote loopback for DS1
lines. This is done by clicking the Create Loopback button. To
remove the loopback, click the Remove Loopback button.
For a description of the trunk parameters, see 'PSTN Parameters' on page 894.
Notes:
• During trunk deactivation, trunk configuration cannot be performed.
• A stopped trunk cannot also be activated and a trunk cannot be
deactivated if it has been stopped.
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