Abstract: IP addresses are presently becoming a scarce resource, even in private IP address domains. Commonly therefore network address translators are used to map a large number of private addresses to a relatively small number of public IP address, or even map addresses between two different IP address domains. However, network address translators do not readily pass voice set-up protocols such as SIP and VoIP packets. By modifying a call server and providing an intelligent network address translator, conventional media gateways may be caused to use the intelligent address translator to route VoIP packets between IP domains having overlapping address spaces.

Abstract: IP addresses are presently becoming a scarce resource, even in private IP address domains. Commonly therefore network address translators are used to map a large number of private addresses to a relatively small number of public IP address, or even map addresses between two different IP address domains. However, network address translators do not readily pass voice set-up protocols such as SIP and VoIP packets. By modifying a call server and providing an intelligent network address translator, conventional media gateways may be caused to use the intelligent address translator to route VoIP packets between IP domains having overlapping address spaces.

Abstract: A consumer entertainment device (for example, a games console, audio recording player, radio frequency broadcast reception apparatus) comprising a telecommunications transceiver arranged for communication over a customer premises network. The device may also comprise telephony handset apparatus, making shared use with the entertainment control apparatus of the telecommunications transceiver. Also a media connections unit arranged to inter-work between such a consumer entertainment device and a public network. Additionally, a network gateway comprising an access control unit whereby to control access to a network from a remote media connections unit.