CHAPTER34 Routing SBC
Mediant 1000 Gateway & E-SBC | User's Manual
● Routes calls from the ITSP (identified by the source tag name-value "Type=ITSP") to the
IP PBXs (identified by the specific port assigned to the IP PBX by the value of the
destination tag name "Port"):
General
Index 2
Name ITSP-to-PBX
Match
Source Tag Type=ITSP
Action
Destination Type Destination Tag
Routing Tag Name Port
Configuring a Routing Response Timeout
If you have routing rules in the IP-to-IP Routing table that need to query external servers (e.g., an
LDAP server or ENUM server) on whose responses the device uses to determine where to route
the SBC calls, you can configure a timeout for the responses. If the timeout expires before the
device receives a response from the server, the device sends a routing failure message (SIP 500)
to the caller, or uses an alternative routing rule (if configured).
➢ To configure a timeout for routing query responses:
1. Open the SBC General Settings page (Setup menu > Signaling & Media tab > SBC folder >
SBC General Settings).
2. In the 'Routing Timeout' (SbcRoutingTimeout) field, enter the maximum duration (in seconds)
that the device is prepared to wait for a response from external servers.
3. Click Apply.
Configuring SIP Response Codes for Alternative
Routing Reasons
The Alternative Routing Reasons table lets you configure up to 20 SIP response codes for SBC call
release (termination) reasons for triggering alternative routing. This feature works together with the
Proxy Hot Swap feature, which is configured in the Proxy Sets table.
In addition to configuring the response codes described in this section, you need to configure the
following:
■ A Proxy Set with one or more addresses (proxy servers) and whose 'Proxy Hot Swap'
parameter is configured to Enable (see Configuring Proxy Sets).
■ An IP-to-IP Routing rule whose 'Destination IP Group' parameter is assigned a Server-type IP
Group that is associated with the above Proxy Set (see Configuring SBC IP-to-IP Routing
Rules).
■ An alternative IP-to-IP Routing rule for the above rule.
Alternative routing based on SIP response codes operates as follows:
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