Version 6.8 379 Mediant 2600 E-SBC
User's Manual 21. SBC Configuration
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 in the Web interface. You can also configure this table using the table ini file
parameter, SBCAlternativeRoutingReasons or CLI command, configure voip > sbc routing
sbc-alt-routing-reasons.
To configure SIP reason codes for alternative IP routing:
1. Open the SBC Alternative Routing Reasons page (Configuration tab > VoIP menu >
SBC > Routing SBC > Alternative Routing Reasons).
2. Click Add; the following dialog box appears:
Figure 21-11: Alternative Routing Reasons Table - Add Record
3. Configure a SIP response code for alternative routing according to the parameters
described in the table below.
4. Click Submit, and then save ("burn") your settings to flash memory.
Table 21-7: SBC Alternative Routing Reasons Table Parameter Descriptions
Parameter Description
Index
[SBCAlternativeRoutingReasons_Index]
Defines an index number for the new table
record.
Release Cause
CLI: rel-cause
[SBCAlternativeRoutingReasons_ReleaseCause]
Defines a SIP response code for triggering the
device's alternative routing mechanism.
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