Protocol issues in interconnecting ISDN, IN, and LAN

The author discusses some of the protocol design and implementation issues in interconnecting integrated services digital networks (ISDN), intelligent networks (IN), and local area networks (LAN). An internetworking architecture for a heterogeneous intelligent network that consists of network-resident intelligent peripherals and three subnetworks, a telephone network, a LAN, and an ISDN, is presented. Design issues and problems encountered in the implementation of four protocol conversion facilities for a heterogeneous intelligent network testbed are analyzed. The testbed allows multimedia real-time communications/messaging among LAN workstations with logically associated telephones and ISDN voice/data terminals with a stylus pen and transparent tablet on top of a bitmap screen.<
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