Cabletron Systems HSIM-W6 manual Telephone Switch Support, Isdn BRI Line Configuration

Chapter 3: ISDN Line Ordering and Configuration

Telephone Switch Support

Your telephone company may offer a variety of ISDN switch types. You must contact your service provider and find out which type of ISDN service is available.

The following switch types are currently supported by the HSIM-W6 within the U.S.:

•National ISDN 1 (NI-1)

•AT&T 5ESS with Custom Software

•DMS-100

Outside of the U.S. the following switch types are currently supported:

•NET3 (European ISDN)

•NET3SW (European Swiss-variant)

•NTT (Nippon Telegraph and Telephone)

•KDD (Kokusai Denshin Denwa Co., Ltd.)

•French Delta (VN4) switches

ISDN BRI Line Configuration

You need to order one Basic Rate Interface (BRI) ISDN line from your service provider. The Basic Rate Interface ISDN line provides two full duplex 64 (Kbps) B channels used for voice, data, fax, etc. and one full duplex 16 Kbps channel used for signaling. Each B channel can be used for a call; i.e., two calls can occur at the same time. Services vary from individual service providers.

NOTE

Full 64 Kbps for each channel (called clear channel) may not be available across the entire communications link. Today, many providers still use in-band signaling

(the 8 Kbps signaling is taken from the B channel bandwidth) so that you may only achieve a 56 Kbps channel speed.

The service provider requires some information from you about your configuration. You must provide your service provider with the required switch settings for the provider’s telephone switch (see Telephone Switch Parameters in this chapter). Consult with your service provider at least two months before requiring the installation and use of the ISDN service.

24 HSIM-W6 User’s Guide