Fujitsu Network Switching of America Inc has introduced two terminal adaptors for the Northern Telecom Ltd DMS-100 public telephone exchange, claiming thereby to be the only full-line Integrated Services Digital Network customer premises equipment vendor to support both AT&T and Northern Telecom switches. The company reckons that the development opens up a large part of the available ISDN Centrex market to the Japanese company, since the two companies are said together to account for 78% of the installed digital switch market in the US. The two terminal adaptors, the SRS-400 and SRS-410, feature a removable cartridge so that users can remove the existing feature cartridge and insert a new one to keep abreast of new ISDN voice and data capabilities, Fujitsu promises, noting that the versions for AT&T’s 5ESS exchanges have been on the market since 1988. The Northern Telecom versions have an identical user interface. The SRS-400 is an RS-232 terminal adaptor to support both asynchronous and synchronous terminals, B-channel or D-channel packet-switched data and B-channel circuit-switched data, plus an optional analogue telephone interface. The SRS-410 is a V35 terminal adaptor for applications such as video conferencing and Group IV facsimile, and for other high-bandwidth applications such as local network bridging and host-to-host communications; an optional analogue telephone interface can be used for Group III facsimile. They support both V.120 and V.110 rate adaption so that devices that need to communicate over an ISDN B-channel at data rates less than 64Kbps can boost its data up to that rate to fill the available 64Kbps channel. They’re out next month in the US; no prices given.
