Version 6.6 679 October 2014
Installation & Operation Manual 41. PSTN Gateway and IP-to-IP Applications
41.6.3 Reasons for Alternative Routing
The Reasons for Alternative Routing are defined via the following two tables:
Alternate Tel to IP
Alternate IP to Tel
Each alternative routing table enables you to define up to 4 different release reasons.
If a call is released as a result of one of these reasons, the Mediant 8000 tries to find
an alternative route to that call. The release reason for IP to Tel calls is provided in
Q.931 notation. The release reason for Tel to IP calls is provided in SIP 4xx, 5xx and
6xx response codes. For Tel to IP calls an alternative IP address, for IP to Tel calls an
alternative trunk group.
See 'Telephone to IP Routing Table' on page 669 for information on defining an
alternative IP address. See 'IP to Telephone Routing Table' on page 675 for
information on defining an alternative trunk group.
41.6.3.1 Alternative Routing Provisioning Rules
Each Alternative Routing table enables you to define up to 4 different release
reasons.
To enable Alternative Routing, set Enable Alternative Routing parameter to Yes
in SIP Protocol Routing Settings screen.
41.6.3.2 Configuring Alternate Routing
This section describes how to configure alternative routing.
To configure Alternative Routing:
1. Click
to access the Media Gateway status screen.
2. Select the desired SIP board. The Board Status screen is displayed.
3. In the Navigation pane, select SIP
GW/IP to IP Routing and then select the
alternative Routing table that you wish to configure ( either Alternate Tel to IP or
Alternate IP to Tel). The Alternative Routing Table list is displayed.
4. Use the
or buttons to add or remove entries.
5. Select a specific row and then in the configuration pane, click the corresponding
button; The corresponding Alternative Routing Settings screen is displayed.
6. Configure the Alternate Routing Table entry parameters according to the table
'Alternative Routing Parameters' below.
7. Click the Maintenance icon
and select Unlock to activate the configuration.
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