Patent ID: 9237088
Filing Date: 2016-01-12
CPC Classification: H04L

Claim Text:
1. An Interrogating Call Session Control Function entity configured to route a Session Initiation Protocol (SIP) request in a terminating network towards a Serving Call Session Control Function entity, comprising: a receiver configured to receive the SIP request; a processor configured to determine that the SIP request has a request Uniform Resource Identifier (URI) which includes a SIP URI with an embedded telephone number; a conversion module configured to generate a telephone number (tel URI) when said SIP URI contains a “phone-context” argument as follows: said processor configured to remove the SIP URI with the embedded telephone number and insert the tel URI in the request URI of the SIP request to form a revised SIP request; and a sender configured to submit the revised SIP request including the request URI with the tel URI towards the Serving Call Session Control Function.