Managing SIP to Q.850 Override Tables

SIP and ISDN use different response messages to communicate why a call failed or could not be connected (Q.850 for ISDN and SIP Responses for SIP). By default, the Sonus SBC 1000/2000 system uses RFC 4497 to map these to each other. Override Tables allow you to override one or more of these mappings to a different message, which is useful for interoperating with nonstandard equipment. To use a table created here, select it from the SIP to Q.850 Override Tables field in a SIP Signaling Groups entry.

Working with SIP to Q.850 Override Tables

1. In the WebUI, click the Settings tab. 
2. In the left navigation pane, go to Telephony Mapping Tables > SIP to Q.850 Override Tables.

To view a table's properties:

1. Click the pop-up icon () next to the entry you want to view.
2. When you are finished, close the window.

To modify a SIP to Q.850 Override Table:

1. Click the expand () Icon next to the entry you wish to modify.
2. Modify the table's Description as desired
3. Click OK.

To create a SIP to Q.850 Override Table:

1. Click the Create ( ) icon.
2. Enter a descriptive name in the Description text field.
3. Click OK.