Abstract: A system and method of implementing interworking function (IWF) between frame relay and IP protocols and networks. The interworking function provides mapping and encapsulation functions necessary to ensure service provided to networks/protocols is unchanged. A frame relay service specific convergence sublayer (FR-SSCS) translates between the Q.922 and UDP/IP sublayer.

Abstract: A system and method of implementing interworking function (IWF) between ATM and IP protocols and networks. The interworking function provides mapping and encapsulation functions necessary to ensure service provided to networks/protocols is unchanged. An ATM service specific convergence sublayer (ATM-SSCS) translates between the ATM layer and RTP/UDP/IP sublayer.

Abstract: A system for a high capacity computer-based communications device is described. The system has an enhance backplane supporting a plurality of busses working independently of each other and each utilized for a different data type. The backplane supports a cPCI bus, a H.110 bus, and a StarLan bus. The system provides for increasing the capacity of the cPCI bus through bridging between two cPCI segments. A first serializer, operatively connected to the first cPCI segment, is used to receive data from a first PCI bus, serializes the data, and transfers the serial data stream to a second serializer which is operatively coupled to the second bus. The second serializer de-serializes the transferred data and transfers it to the second PCI bus. The backplane is utilized with a router and I/O modules to provide a device which combines traditional IP routing capabilities with a gateway for non-IP traffic to the IP network.