Isdn Applications - Toshiba Strata DK14 General Description Manual

Basic Rate S/T Interface Subassembly (RBSS) attaches to the RBSU to provide two additional
BRI S/T interfaces that can be used for station-side connections only.
The combination of the RBSU and the RBSS subassembly can provide four BRI interfaces in one
card slot.
Note Network connections using BRI S/T interface require a customer-supplied external NT-1
device.
The following BRI U Interface cards are supported by DK424 Release 4.2 and higher systems:
Basic Rate U Interface Unit (RBUU) provides two BRI U (two-wire) interfaces that can be
used for network- or station-side connections. The RBUU has connectors for a two-port add-
on subassembly.
Basic Rate U Interface Subassembly (RBUS) attaches to the RBUU to provide two additional
BRI U interfaces that can be used for station-side connections only.
The combination of the RBUU and the RBUS subassembly can provide four BRI interfaces in one
card slot.

ISDN Applications

ISDN features can be employed in many useful applications.
Calling Number Services: The Signaling System 7 (SS7) communications network supports
ISDN PRI trunks across various CO switching systems by providing end-to-end digital
connectivity. In a calling number service application, for example, this extends calling number
information across the entire Public Switched Telephone Network (PSTN) by passing this
information across the various CO switching system nodes. Calling number information is
very important in CTI applications.
High Speed Data: Performance improvement (speed and accuracy) and connectivity is
becoming a major factor in ISDN data-related applications. For example, a computer database
interface works well on ISDN lines for large capacity file transfer, high resolution graphics
transfer, online transaction processing, and information retrieval applications. ISDN provides
better performance for these applications which require faster call setup and network response
times than older, more restrictive analog networks can provide. ISDN also provides higher
data accuracy than today's analog network.
Video Conferencing: Color video transmission requires greater bandwidth and flexibility for
video conferencing and related applications. Video conferencing systems integrate cameras,
displays, CODECs, and control units. The CODEC can set up various transmission rates
between 64 kbps and 1.5 Mbps, as required.
Video Telephones: Video phones can transmit voice and image simultaneously with ISDN.
Transmission of still images at high speeds is easy, as well as color moving picture
communication among several parties. This integrates a telephone, a video camera with an
image sensor, and a small color LCD display.
Multi-device Connection: Up to eight devices can share one ISDN BRI line using station-side
connections. For example, one line can accommodate two phones and multiple PCs or fax
machines. The station interface is limited to two DNs. With conventional analog service, two
lines are required to transmit data and talk on the phone at the same time, unless a Data
Interface Unit (DIU) is used. The customer saves money by sharing CO line resources and is
provided the benefits of higher speed.
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Features
System Features
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