Nortel 1000 Installation And Commissioning Manual page 33

The QPC720 PRI provides both a T1 line interface and a control interface to
link to a signal format compatible with EIA standard RS-232-C. Both the PRI
and the Echo Canceller act as Data Terminal Equipment (DTE). The Echo
Canceller's control protocol must conform to that of the Tellabs Model 251.
64 T-link version 2 protocol
The QPC720 card supports the 64 T-link version 2 protocol. The QPC720
together with theQMT21 High Speed Data Module supports the 64K Clear
Data feature. The QPC720 card provides a trunk that ties two switches
together. This trunk allows 64K eClear Data to pass from the system to an
outside network. The QMT21 module allows Data Terminal Equipment
(DTE) to send and receive 64K Clear Data. See Meridian Link ISDN/AP
General Guide (553-2901-100) for more information about the 64K Clear
Data feature.
Table 5
QPC720 PRI cables and cable lengths
Cable type From
QCAD130 QPC720
QCAD130 QPC720
QCAD328A QPC720
QCAD328B QPC720
QCAD328C QPC720
QCAD328D QPC720
QCAD124 QPC720
QCAD128 QPC720
RS-232 QPC720
NTND26AA QPC720
NTND26AB QPC720
NTND26AC QPC720
NTND26AD QPC720
NTND98 QPC720
22AWG ABAM Echo Canceller
Copyright © 2003-2007, Nortel Networks
.
To
QPC471/QPC775 (CC-0)
QPC471/QPC775 (CC-1)
QPC757 DCHI
QPC757 DCHI
QPC757 DCHI
QPC757 DCHI
QPC414 Network
Bulkhead I/O panel
Echo Canceller
NT6D80 MSDL
NT6D80 MSDL
NT6D80 MSDL
NT6D80 MSDL
Input/output panel
DSX-1
Note: The QPC775 Clock Controller is not available in the U.S.A. There
can be no mixing of QPC775 and QPC471 in one system.
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
QPC720 PRI 33
Maximum
Maximum length
length (feet) (meters)
7
7
6
18
35 10.67
50 15.24
50 15.24
25
50 15.24
6
18
35 10.67
50 15.24
6
655 199.64
2.13
2.13
1.8
5.5
7.62
1.8
5.5
1.8