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The ISDN calling party subaddress parameters convey address information of each device in ISDN network. The ISDN Calling Party subaddress can now be interworked into the SIP protocol using the isub and isub encoding parameters. By interworking these two parameters, the ISDN calling Party Subaddresses as well as its encoding type can be passed between ISDN and SIP as well as SIP and ISDN. Below is more information pertaining to the interworking of these parameters.
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**N/A - Outgoing SIP will not include 'isub' and 'isub encoding' parameters.
Call Trace:
Call Trace - ISUB ENC ISDN to SIP
Call Trace - ISUB ENC SIP to ISDN
Configuration:
The isub encoding parameter is a field added to the SIP From Header Tags object. The From Header Tags object is configured under the SIP SGP object and is eventually inserted into a external network element object. Below are instructions on how to configure the isub encoding parameter for interworking between ISDN and SIP. Verify the following entities are configured before proceeding:
Configure these initial objects before proceeding to the procedure below.
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Right click on Profiles object created earlier and select New SIP SGP. A SIP object will appear. Change the ID from the first field to something other than ID:0. ID:0 is the default SIP profile and the SIP isub encoding field cannot be configured within this default object. See IMG 1010 - SIP Profile - 10.5.3 for more information on configuring this object.
Right click on the SIP SGP object just created and select New SIP from Header Tags. A SIP From Header Tags object will appear. Select 'enable' from the drop down menu. See below.
Create SIP Profile (SGP) and Enable ISUB Encoding (Called Party)
Right click on Profiles object created earlier and select New SIP SGP. A SIP object will appear. Change the ID from the first field to something other than ID:0. ID:0 is the default SIP profile and the SIP isub encoding field cannot be configured within this default object. See IMG 1010 - SIP Profile - 10.5.3 for more information on configuring this object.
Click in the R-URI Header Tags field and a Select Multiple Items box will appear. Select ISUB Encoding from the list and select OK. See screen capture below.
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Right click on Dialogic IMG EMS and select New External Network Elements. An External Network Elements pane will appear. No configuration is accomplished in this pane. This pane is a placeholder for multiple Network Elements to be created beneath it. See IMG 1010 - External Network Elements object for more information.
Right Click on External Network Elements object created and select New External Gateways. An External Gateways pane will appear. again this pane is a placeholder from multiple External Gateways. No configuration is needed. See IMG 1010 - External Gateways for more information.
Right Click on the External Gateways object and select New External Gateway. A screen like below will appear.
- Enter a name to identify the gateway that IMG will communicate with using ISUB Encoding
- Select SIP under the Gateway Signaling Protocol field- Enter IP Address of the Gateway the IMG will communicate with
- Select the SIP SGP Profile that was created earlier. This profile has the ISUB Encoding configured in it.At this point the Isub Encoding interworking is configured on the IMG. The next step will be to set up the routing so that the specific channel groups are configured to route from ISDN to the External Network element configured above. See any of the multiple topics that describe the routing process. The following two links below are a good starting point.
IMG 1010 - Overview of Routing
IMG 1010 - Configuring Routing
Additional Information:
Calling Party Address- The parameters mapping is accomplished between SIP From Header isub/isub-encoding and the ISDN Calling Party Subaddress IE.
Called Party Address- The parameters mapping is accomplished between R-URI and SIP To Header isub/isub-encoding and the ISDN Called Party Subaddress IE.
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