Patent ID: 9288237
Filing Date: 2016-03-15
CPC Classification: H04L

Claim Text:
1. A method in a protocol conversion gateway for enabling a client that does not support a Session Initiation Protocol (SIP) transport protocol to communicate with a SIP proxy, the method comprising: receiving a first SIP message, over a non-standard SIP transport protocol, from the client, wherein the first SIP message includes a first header and a second header that each comprise a dummy address created by the client; allocating a contact address for the client; replacing the dummy address of the first header with a SIP address of the protocol conversion gateway and also replacing the dummy address of the second header with the allocated contact address for the client to make an amended SIP message; sending said amended SIP message to the SIP proxy over a standard SIP transport protocol; receiving, from the SIP proxy, a SIP response message that also includes the first header and the second header; inserting the dummy address into both the first header and the second header of the received SIP response message to make an amended SIP response message; and sending said amended SIP response message to the client over said non-standard SIP transport protocol.