Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Data Management Solutions
8-4Digital interfaces
8
DCP’s framing structure allows voice, data, and signaling information to be trans-
mitted with low overhead and be virtually free of errors. DCP transmits at a rate
of 8000 frames per second or 160 kbps. DCP allows data and digitized voice to be
multiplexed on two twisted pairs, terminating in a standard telephone jack.
The 6416D+M and 6424D+M DCP telephones are of special interest for data
management. These telephones uses DCP to provide the full capabilities of digital
voice and data, but also provides an analog port for data connectivity. This is
important for business people who use laptop computers with analog modems.
Users can connect their laptop computers to the telephone for data, and use the
telephone for simultaneous voice calls, all through a single pair of wires.
ISDN-PRI
ISDN-PRI delivers ISDN service to the system for high-speed connectivity to the
public switched telephone network and to other systems in a private or public
network. It can also be used to connect to host computers that support the
interface. PRI provides 24 64 kbps channels arranged in the North American
ISDN standard of 23B plus D. That is, the 24 channels are divided into 23 bearer
(B) channels at 64 kbps for information transmission and one signaling (D)
channel at 64 kbps for control and signaling. Outside the United States, the
system supports ISDN-PRI using the international E1 format, which provides 30B
plus D.
The system offers applications that use the ISDN-PRI. See the Network Solutions
section for information on these applications.
World-Class BRI
World-Class BRI provides an international BRI platform that offers multiple
protocol options to meet specific country and application requirements. It provides
access to Video Conferencing, Desktop Video Conferencing, Data Transmission,
and other nonvoice-based applications that use BRI as a communication
interface. Voice access is not supported, though voice features are not blocked for
World Class BRI terminals.
World class BRI devices must be administered as the type “wcbri.” You select a
country protocol for each terminal that will use the feature. This selection deter-
mines both the code set modifications required to meet the national standards, as
well as the terminal initialization procedures, if required.