By default, the SBC 1000/2000 uses RFC 3398 cause code mappings. This table allows SBC 1000/2000 Administrators to define other cause code mappings between Q.850 and SIP
To create or modify an Entry to a Q.850 to SIP Override Table:
In the left navigation pane, go to Telephony Mapping Tables > Q.850 to SIP Override Tables > Entry.
Click the Create Q.850 Cause Code to SIP Override () icon.
Specifies the SIP Response Codes to which the selected Q.850 Cause Codes is mapped.