The CONNECT is a Terminal Adapter (TA), i.e. the ISDN equivalent of a modem on the PSTN (the analogue telephone network). It allows standard serial data terminals (DTEs), such as personal computers, to be interconnected across the ISDN. The CONNECT is as easy to install and use as a modem and will operate with all existing terminals and communications applications that use the Hayes Standard AT Command Set. In addition, the CONNECT has an analogue interface port that emulates a standard PSTN line. This port allows devices such as a phone, fax, or answer-phone to make calls over your ISDN line. An ISDN connection provides three potential communications channels.

Two (’B’) Channels provide links running at 64000 bps which give greater throughput than the fastest modem. These ‘B’ Channel links support calls to other ISDN lines or (for voice calls) other PSTN analogue lines. The third link is a lower speed ‘D’ Channel data link, that allows calls to be made to a third party data network such as a public packet switch network. It is possible to have several ISDN devices sharing a single ISDN line through a facility known as the ‘S’ Bus. This allows all the connected devices to contend for the channels and to be separately addressable. The CONNECT range supports all these ISDN services. An ISDN line can support ‘data’ and ‘voice’ calls. In general ‘data’ calls are those made from the CONNECT’s data port. ‘Voice’ calls are calls made from the CONNECT’s analogue port. On the ISDN line, incoming calls are identified as ‘data’ or ‘voice’ calls and are automatically routed by the CONNECT to the appropriate port.

Download pdf ISDN Connect Data and Voice Terminal Adapter User Manual