SIP User's Manual 600 Document #: LTRT-12804
Mediant 800 MSBG
8.5.3.5.2 Manipulating Destination Number of Incoming INVITE
You can define a manipulation rule to manipulate the destination number in the Request-
URI of incoming INVITE messages when SAS is in emergency state. This is required, for
example, if the call is destined to a registered user but the destination number in the
received INVITE is not the number assigned to the registered user in the SAS registration
database. To overcome this and successfully route the call, you can define manipulation
rules to change the INVITE's destination number so that it matches that of the registered
user in the database. This is done using the IP to IP Inbound Manipulation table.
For example, in SAS emergency state, assume an incoming INVITE has a destination
number "7001234" which is destined to a user whose registered in the SAS database as
"552155551234". In this scenario, the received destination number needs to be
manipulated to the number "552155551234". The outgoing INVITE sent by the device then
also contains this number in the Request-URI user part.
In normal state, the numbers are not manipulated. In this state, SAS searches the number
552155551234 in its database and if found, it sends the INVITE containing this number to
the UA.
¾ To manipulate destination number in SAS emergency state:
1. Load an ini file to the device with the following setting to enable inbound manipulation:
SASInboundManipulationMode = 1
2. Open the 'SAS Configuration' page (Configuration tab > VoIP menu > SAS > Stand
Alone Survivability).
3. Click the IP to IP Inbound Manipulation Table
button to open the 'IP to IP
Inbound Manipulation' page.
4. Enter a table index number, and then click Add.
5. Define the rules as required, and then click Apply.
The figure below displays a manipulation rule for the example scenario described above
whereby the destination number "7001234" is changed to "552155551234":
Figure 8-116: Manipulating INVITE Destination Number
In the figure above, the following configuration is done:
Manipulated URI field: 'Destination'
Destination Username Prefix field: '700xxxx'
Request Type field: 'INVITE'
Remove From Left field: '3'
Prefix to Add field: '55215555'
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