Isdn Basic Rate Interface (Bri) - Toshiba Strata DK14 General Description Manual

Features
System Features

ISDN Basic Rate Interface (BRI)

BRI is the smaller capacity ISDN interface, providing two simultaneous voice or data connections.
BRI uses the 2B+D transmission format which is defined as two 64 kbps bearer channels and one
16 kpbs data (control) channel.
The two B-channels can also be combined for data transmission at speeds up to 128 kbps. The D-
channel carries call setup control data and can also be used as a third connection for packet data
transmission when using an external NT-1.
ISDN BRI services are designed mostly for end-user station interfaces. The system can connect
group IV faxs, PCs, computer terminals or ports, LAN bridges and routers, video conferencing
terminals, or other devices that can benefit from an all digital transmission link.
The DK40i and DK424 system also supports BRI interface from the public network as CO line
service. The station-side connection supports multi-point multiple device connection to the same
BRI circuit. Applications that are supported include:
Video conferencing
Remote access servers
Faster Internet access
High-speed data connections to the public ISDN network, as well as typical voice and fax
connections
Calling Number ID services
DID
Calling Number ID services are provided through the D-channel function of ISDN's out-of-band
signaling format. The ISDN link sends the Caller ID for the service originating the call. This
number can be the listed DN, DID number, or a private line number used for billing, as well as
identification to the called location. Caller ID blocking and screening are available options.
Incoming calls are identified by Caller ID and the information is used in the DK424 like ANI.
DNIS information is also provided over ISDN lines.
The Strata 40i supports the BRI interface by installing the Basic Rate Interface Unit S/T (TBSU) in
the base cabinet. The TBSU provides two BRI S/T (four wire) interfaces that can be independently
used for network- or station-side connections.
The following BRI S/T Interface cards are supported by DK424 Release 4.1 and higher systems.
The DK40i also supports these interfaces in the expansion cabinet:
Basic Rate S/T Interface Unit (RBSU) provides two BRI S/T (four-wire) interfaces that can be
used for network- or station-side connections. It has connectors for a two-port add-on
subassembly.
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System Availability
Unavailable for Strata DK14
Optional on Strata DK40i/DK424 (Release
4.1 and higher)
Strata DK Feature Description 5/99