Introducing The T1/PRI Line Board
The revision B or later DXPT1 board with special-purpose firmware serves as host for the DXPRI card and gives
gives the digital communications system the capability to handle up to 24 channels of voice and/or data
transmissions over a single four-wire cable using multiplexing techniques. The DXPT1 board includes a customer
service unit (CSU) to eliminate the need for a external CSU.
Defining T1/PRI Operation
T1/PRI is the digital two-way transmission of telecommunications over a single high-speed circuit. Up to 24
separate voice or data transmissions form digital pulses that are transferred at the rate of 1.544 million bits per
second (Mbps) over the T1/PRI trunk. At the receiving end, the digital pulses are decoded into 24 separate circuits.
Pulse characteristics such as repetition rate, pulse width, pulse amplitude, and average ones density ((ratio of one
(1) bits to zero (0) bits)) are as specified by digital signal level 1 (DS-1) described in American National
Standards Institute Specification, ANSI T1.403-1989.
Detailing Where You Can Install T1/PRI Boards and Its Supporting Needs
Since the DXP Plus supports a maximum of 240 lines, and each T1/PRI board handles up to 24 channels, you can
install up to 10 boards in the DXP Plus system. You can install these 10 boards in any available universal board
slot in the main or expansion cabinets. Of course, any other line boards that you install, such as loop start, DID or
multipurpose, reduce the number of lines available for T1/PRI service and thus reduces the number of T1/PRI
boards that you can install.
Whenever you install one or more boards, and the DXP Plus is receiving its timing signals from an external
source (the usual case), you must install one synchronization card (DXOPT–SYN) on the services board. This
means that when you connect the system to central office (CO) lines, you must include a synchronization card,
and the DXP Plus clock must be controlled by CO signalling.
If you are unfamiliar with the terms and component names associated with the T1/PRI digital carrier transmission
option, refer to paragraph titled, Defining The T1/PRI Terms, at the end of this publication.
CAUTION
For operation with the DXP Plus, the T1/PRI board must be Revision B or higher and have
special-purpose firmware installed.
IMI89–255
Installing And Programming The DXPRI Card
2 – Introducing The T1/PRI Line Board
Содержание DXP Plus Series
Страница 1: ...Digital Communications System R ...
Страница 363: ...Automatic Call Distributor Technical Manual R QuickQ DXP ...
Страница 424: ...Automatic Call Distributor System Manager s Guide R QuickQ DXP ...
Страница 500: ...Wrap up Time 1 6 Wrapping Up A Call 4 3 Z Zoom Box A 2 GCA70 271 Index I 3 ...
Страница 628: ...Interconnecting The VMI X Installing And Programming For ExecuMail IMI89 206 Installing And Programming For ExecuMail 5 ...
Страница 677: ...Connecting The Equipment Installing And Programming The OPX X IMI89 209 Installing The OPX X 7 ...
Страница 728: ...DP I I I I and FX Series Digital Communications Systems Understanding The Visual Man Machine Interface COMDlA ...
Страница 1112: ...9 08 8 90 1 13 4 78 3 94 UNIS029 TAB003 PLS page 6 GCA40 130 DXP Plus General Description 11B Telephone Features ...