1. A method of operating broadband access equipment to provide roaming IP multimedia subsystem (IMS) access, the method comprising:
in a communication interface, attaching a communication device to provide the communication device with access to a broadband
access network associated with a visited domain of the communication device;
in a proxy call session control element of a broadband services gateway (BSG):
registering the communication device to access IMS services on behalf of an IMS core in the visited domain over the broadband
conveying Session Initiation Protocol (SIP) signaling between the communication device and the IMS core as a SIP proxy; and
establishing a communication session between the communication device and the IMS core.