Supplementary Service for COLP and COLR
During SIP-I to SIP calls, if the 200 OK message received from the IMS node contains a P-Asserted-Identity header, the SBC encodes some parameters of ISUP messages. The SBC only performs this function if the P-Asserted-Identity header is in SIP, SIPS or Tel-URI format. If Tel-URI format is accompanied by SIP and/or SIPS format, theSBC uses the header in Tel-URI format.
Connected Number
Connected Number subfield interworking includes:
-
Nature of address—The SBC inserts the following values into the IAM, based on the conditions described:
- National, if there is no + in the number (encoded to 0000011).
- International, if there is a + in the number (encoded to 0000100).
- Numbering Plan Indicator—ISDN (001)
- APRI—This interworking is dependent on
the value of either the SIP privacy header or the priv-value presented in the
History-info:
- If the privacy header is present and contains a value other than 'none', map to restricted (01).
- If the privacy header is absent, or present with the value 'none', map to allowed (00).
- Screening Indicator—Network Provided (11)
- Address Signal—P-Asserted-Id user-part