6.1. Basic Rate Interface

There are two types of Global Call BRI boards, BRI/SC and BRI/2:

• The BRI/SC boards allow individual routing of up to 32 B channels (voice/data channels) and 16 D channels (signaling channels) to any of the application-selectable SCbus time slots using the SCbus distributed switching capability. B channel traffic may be routed from the ISDN network or local station set device to and from the SCbus. BRI/SC boards can be used in either a Windows or a Linux operating environment.

  The Global Call BRI/SC protocol implementations comply with the North American standard ISDN BRI, Euro-ISDN protocol for BRI, and the INS64 standard used in Japan.

• The BRI/2 boards emulate two standard BRI station sets with display, and are designed to support the Euro-ISDN protocol. The BRI/2 boards provide analog voice processing, via the Global Call Voice Functions (see Note 1 below) and the Global Call ISDN API, and support many enhanced ISDN features. In addition, BRI/2 boards can facilitate four instances of Global Call DSP-based Group 3 Fax (also referred to as DSP Fax, see Note 2 below) and provide ISDN B channel data communications. BRI/2 boards are currently supported only under the Windows operating system.

Notes:

1. For information on using Voice Functions, see the Voice API Programming Guide and Voice API Library Reference.
2. For information on using DSP Fax with the BRI/2, see the Fax Software Reference.

The Global Call BRI/SC and BRI/2 boards provide network access via the ISDN Basic Rate Interface (BRI). The BRI/SC boards can also function as a digital station interface, enabling direct access to BRI station sets (telephones) from PC-based computer telephony (CT) systems, and eliminating the need for local switch integration.

The BRI/SC boards may also be used for connecting voice processing applications to PBX or Public Switched Telephone Network (PSTN) BRI access lines.

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