Version 7.0 615 Mediant 3000
User's Manual 33. Routing SBC
Reasons table and 3) configuring an alternative routing rule.
Notes:
• If the device receives a SIP 408 response, an ICMP message, or no response,
alternative routing is still performed even if the SBC Alternative Routing Reasons
table is not configured.
• SIP requests belonging to an SRD or IP Group that have reached the call limit
(maximum concurrent calls and/or call rate) as configured in the Call Admission
table are sent to an alternative route if configured in the IP-to-IP Routing table for
the SRD or IP Group. If no alternative routing rule is located, the device
automatically rejects the SIP request with a SIP 480 (Temporarily Unavailable)
response.
The following procedure describes how to configure the SBC Alternative Routing Reasons
table through the Web interface. You can also configure it through ini file
(SBCAlternativeRoutingReasons).
 To configure SIP reason codes for alternative IP routing:
1. Open the SBC Alternative Routing Reasons table (Configuration tab > VoIP menu >
SBC > Routing SBC > Alternative Routing Reasons).
2. Click Add; the following dialog box appears:
Figure 33-6: SBC Alternative Routing Reasons Table - Add Row Dialog Box
3. Configure a SIP response code for alternative routing according to the parameters
described in the table below.
4. Click Add.
Table 33-4: SBC Alternative Routing Reasons Table Parameter Descriptions
Parameter Description
Index
[SBCAlternativeRoutingR
easons_Index]
Defines an index number for the new table row.
Note: Each row must be configured with a unique index.
Release Cause
[SBCAlternativeRoutingR
easons_ReleaseCause]
Defines a SIP response code for triggering the device's alternative routing
mechanism.
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