Nortel Networks NN43001-301 - Manual (Page 33)

QPC720 PRI 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 To
Maximum
length (feet)
Maximum
length
(meters)
QCAD130 QPC720 QPC471/QPC775 (CC-0) 7 2.13
QCAD130 QPC720 QPC471/QPC775 (CC-1) 7 2.13
QCAD328A QPC720 QPC757 DCHI 6 1.8
QCAD328B QPC720 QPC757 DCHI 18 5.5
QCAD328C QPC720 QPC757 DCHI 35 10.67
QCAD328D QPC720 QPC757 DCHI 50 15.24
QCAD124 QPC720 QPC414 Network 50 15.24
QCAD128 QPC720 Bulkhead I/O panel 25 7.62
RS-232 QPC720 Echo Canceller 50 15.24
NTND26AA QPC720 NT6D80 MSDL 6 1.8
NTND26AB QPC720 NT6D80 MSDL 18 5.5
NTND26AC QPC720 NT6D80 MSDL 35 10.67
NTND26AD QPC720 NT6D80 MSDL 50 15.24
NTND98 QPC720 Input/output panel 6 1.8
22AWG ABAM Echo Canceller DSX-1 655 199.64
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
Copyright © 2003-2007, Nortel Networks
.