Version 6.6 467 October 2014
Installation & Operation Manual 38. Configuring the PSTN Subsystem
Deactivate – take the trunk out-of-service by raising AIS alarm; the
synchronization with the remote PSTN side will be lost, but you will not be able to
modify the Online configuration parameters of the trunk; use this action to
temporarily stop service on the specific trunk when the Lock action is unavailable
(e.g. when SS7 link is defined on the trunk); note however that service on the
deactivated trunk will be restored when the Media Gateway board restarts (as a
result of lock/unlock maintenance actions or board failure)
Activate – restore service on the deactivated trunk.
D-Channel Switchover – switch over from a primary enabled NFAS trunk to its
backup enabled NFAS trunk. Both trunks should be unlocked , enabled and in the
same NFAS Group.
38.4.1.2 Trunks Configuration
To connect the Mediant 8000 to the PSTN network, connect the proper PSTN cables
to the TP-6310 or TP-8410 Media Gateway boards, as described in 'Connecting to the
PSTN Network' on page 122. Change the configuration of the E1/T1 trunks to match
the configuration on the remote PSTN side and unlock all the E1/T1 trunks that are
actually connected.
To configure E1/T1 trunks on specific Media Gateway board:
1. Access the DS1 Trunks List screen, as described above.
2. Select a DS1 Trunk and then in the configuration pane, click Trunk Settings; the
Trunk Settings screen is displayed.
3. Modify parameters as described in the table 'Trunk Properties' below.
Note: Pay special attention to the Framing Method Type attribute in Trunk's
configuration – it must match the Protocol Type attribute.
4. Click Apply to complete the configuration.
5. Unlock all trunks that are actually connected to the remote PSTN equipment, by
selecting the corresponding trunks in the DS1 Trunks List screen and choosing
Unlock in the Actions menu.
6. Verify that the trunk is successfully synchronized with the remote side and is
ready for service by checking that its Operational State is Enabled (trunk will be
colored Green in the EMS GUI).
Note: To minimize the amount of irrelevant traps and notifications, keep the
disconnected and/or unsynchronized trunks locked.
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