CROSSING OF A NAT ADDRESS TRANSLATION EQUIPMENT FOR SIP-PROTOCOL SIGNALLING MESSAGES BY ADDRESS INFORMATION REDUNDANCY

摘要

The invention relates to a method for establishing a communication session (fm) between a calling communication client (C1) and a called communication client (C2) through a communication network (SN1, SN, SN2) that comprises at least one address translation equipment (NAT1, NAT2). The method comprises the steps of transmitting signalling messages (fs) transiting through the address translation equipment(s) and allowing the exchange of physical addresses of communication clients for establishing the communication session. The method is characterised in that at least one client transmits at least one signalling message containing a physical address in a first location, and a coded information containing the same physical address in a second separate location.