Method and arrangement for enabling multimedia communication

A multimedia gateway of a private network, for providing access to multimedia services for communication devices connected to said private network, the multimedia gateway being connected to a multimedia service network and having a service identity which is valid in the multimedia service network comprising:

• a microprocessor,
• a non-transitory computer-readable storage medium, coupled to the microprocessor, further including computer-readable instructions, when executed by the microprocessor, are configured to:
• receive a session request for communication between at least one device in the private network and a remote party,
• determine if the at least one device is a personal device, wherein the personal device is a device with an individual valid service identity, and the individual service identity is defined in the multimedia gateway,
• in response to determining the at least one device in the private network is a personal device, establish a session between the at least one device in the private network and the remote party using the individual valid service identity assigned to the at least one device in the private network,
• establish a session between the at least one device and the remote party using a negotiation procedure on behalf of said at least one device in the private network in response to said session request, use the service identity of the multimedia gateway, and use the capabilities of said at least one device in the private network in the negotiation procedure, responsive to determining that the at least one device is not a personal device,
• store session-specific information in a session mapping table which can be used for further signaling related to the session, wherein the session specific information includes a Call ID defining the session, a local IP address and selected port of said at least one device, a reserved port of a residential gateway of the private network, and an IP address of a remote party, and
• wherein the service identity includes an IP Multimedia Public Identity (IMPU).