Nortel QPC757 User manual

ISDN PRI Installation
Meridian 1
ISDN Primary Rate Interface
Installation
Document Number: 553-2901-200
Document Release: Standard 11.00
Date: August 1996
Year Publish FCCTM
© 1989, 1996
All rights reserved
Printed in the United States of America
Information is subject to change without notice.Northern Telecom reserves the right to make changes in design
or components as progress in engineering and manufacturing may warrant.This equipment has been tested
and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the
radio interference regulations of Industry Canada.These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment.This equipment
generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications.Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at this own expense.
SL-1 and Meridian 1 are trademarks of Northern Telecom.

iii
ISDN PRI Installation
Revision history
August 1996
Issue 11.00 released as Standard for Generic X11 Release 22.
December 1995
Issue 10.00 released as Standard for Generic X11 Release 21B.
July 1995
Issue 9.00 released as Standard for Generic X11 Release 21A.
December 1994
Standard, Release 8.00.
October 31, 1993
Standard, Release 7.00.
August 1, 1993
Standard, Release 6.00.
April 1, 1993
Standard, Release 5.00.
December 31, 1992
Standard, Release 4.00.
December 1, 1991
Standard, Release 3.00.
December 20, 1990
Standard, Release 2.00.
December 20, 1989
Standard, Release 1.00.

v
ISDN PRI Installation
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Document organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Note to installers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Primary Rate Interface equipment: overview . . . . 5
ISDN Signaling Link hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
QPC720 faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Carrier interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Echo Canceller interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
64 T-link version 2 protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
QPC757 DCHI/NT6D80 MSDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Interface to PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
QPC757/NT6D80 faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
NT6D80 MSDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
MSDL/PRI interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
MSDL faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Clock operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Tracking mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Free run (non-tracking) mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Holdover mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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553-2901-200 Standard 11.00 August 1996
Reference clock errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Automatic clock recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Automatic clock switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DTI to PRI conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PRI installation: ST, STE, 21, 21E . . . . . . . . . . . . . 27
PRI circuit card locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Installing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Removing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
PRI installation: RT . . . . . . . . . . . . . . . . . . . . . . . . . 35
PRI circuit card locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Installing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Removing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
PRI installation: NT, 51/51C, 61/61C . . . . . . . . . . . 43
PRI circuit card locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Installing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Removing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
PRI installation: XT, 71 . . . . . . . . . . . . . . . . . . . . . . 55
PRI circuit card locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Installing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Removing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
PRI installation: 81/ 81C . . . . . . . . . . . . . . . . . . . . . 65
PRI circuit card locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Installing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Removing the QPC720 PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Contents vii
ISDN PRI Installation
Clock Controller Installation . . . . . . . . . . . . . . . . . 75
Determining slots and shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Replacing a Clock Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Installing a Clock Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Starting the Clock Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Clock Controller commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Installing the Clock Controller in a single group . . . . . . . . . . . . . . 82
DCHI installation for all systems . . . . . . . . . . . . . . 87
Installing the QPC757 DCHI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
D-channel parameter downloading . . . . . . . . . . . . . . . . . . . . . . . . . 91
Removing the QPC757 DCHI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
MSDL installation for all systems . . . . . . . . . . . . . 93
Installing the MSDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
NTD12 Dual-port DTI/PRI card description and
installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
NT5D12 Dual-port DTI/PRI (DDP) card overview . . . . . . . . . . . . . . . 99
Supported software releases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
NTBK51AA daughterboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
D-Channel and MSDL interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
DDP faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
System capacity and performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Physical capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
D-Channel capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
CPU capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Testability and diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Hardware required for DDP configuration . . . . . . . . . . . . . . . . . . . . . . 113
Cabling requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Trunk Tip/Ring cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Reference clock cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
MSDL/DCHI cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

viii Contents
553-2901-200 Standard 11.00 August 1996
Cabling diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Clock operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Reference clock errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Automatic clock recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Automatic clock switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Clocking configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
DDP installation and removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
DDP circuit card locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Port definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Replacement of a digital trunk (QPC720/QPC472) by a DDP card 138
DDP switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
General Purpose Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Trunk interface switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Ring ground switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
DCH mode and address select switches . . . . . . . . . . . . . . . . . . . . . 142
Installing the NT5D12 DDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Removing the NT5D12 DDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Configuring the NT5D12 DDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
DDCH installation for all systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Installing the DDCH daughterboard . . . . . . . . . . . . . . . . . . . . . . . . 151
DDCH removal for all systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Removing the DDCH daughterboard . . . . . . . . . . . . . . . . . . . . . . . 152
Echo Canceller for all systems . . . . . . . . . . . . . . . 153
PRI to Echo Canceller pin assignments . . . . . . . . . . . . . . . . . . . . . . . . 153
Electromagnetic Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
ISL installation for all systems . . . . . . . . . . . . . . . 157
ISL configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
DCHI switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
MSDL switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Shared mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Dedicated mode using leased line . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Dedicated mode using dial-up modem . . . . . . . . . . . . . . . . . . . . . . 161

Contents ix
ISDN PRI Installation
Dedicated mode using PRI/DTI trunks . . . . . . . . . . . . . . . . . . . . . . 164
ISL installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
ISL dedicated mode (digital and analog) . . . . . . . . . . . . . . . . . . . . . . . 167
ISL shared mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
PRI cabling information . . . . . . . . . . . . . . . . . . . . . 169
QCAD128/NT8D83xx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
QCAD129/NT9J93xx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
QCAD133/NT8D83xx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
QCAD328 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
NT8D74 Clock Controller to InterGroup cable . . . . . . . . . . . . . . . . 174
NT8D75 Clock Controller to Clock Controller cable . . . . . . . . . . . 174
NT8D79 PRI/DTI to Clock Controller cable . . . . . . . . . . . . . . . . . 174
NT8D83 PRI/DTI to I/O cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
NT8D85 Network to PE cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
NT8D86 Network to I/O cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
NT8D97AX PRI/DTI I/O to MDF cable . . . . . . . . . . . . . . . . . . . . . 176
NT9J93AD PRI/DTI Echo Canceller to I/O cable . . . . . . . . . . . . . 176
NTND26 PRI to MSDL cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
NTND27 MSDL to I/O panel cables . . . . . . . . . . . . . . . . . . . . . . . . 177
NTND98 PRI to I/O panel cables . . . . . . . . . . . . . . . . . . . . . . . . . . 177
ISDN card slot positions . . . . . . . . . . . . . . . . . . . . . 179

xi
ISDN PRI Installation
List of figures
Figure 1
PRI hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2
QPC720 PRI faceplate layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 3
QPC757 DCHI faceplate layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 4
NT6D80 MSDL faceplate layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 5
Clock controller primary and secondary tracking . . . . . . . . . . . . . . . . 21
Figure 6
PRI circuit card (QPC720) option settings . . . . . . . . . . . . . . . . . . . . . . 24
Figure 7
ST, STE, 21, 21E cabling without Echo Canceller . . . . . . . . . . . . . . . 31
Figure 8
ST, STE, 21, 21E cabling with Echo Canceller . . . . . . . . . . . . . . . . . . 32
Figure 9
PRI card (QPC720) switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 10
RT cabling without Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 11
RT cabling with Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 12
PRI card (QPC720) switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

xii List of figures
553-2901-200 Standard 11.00 August 1996
Figure 13
Half group cabling without Echo Canceller . . . . . . . . . . . . . . . . . . . . . 49
Figure 14
Half group cabling with Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 15
Single group cabling without Echo Canceller (NT, 61/61C) . . . . . . . . 51
Figure 16
Single group cabling with Echo Canceller (NT, 61/61C) . . . . . . . . . . 52
Figure 17
PRI card (QPC720) switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 18
XT, 71 cabling without Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . . 58
Figure 19
XT, 71 cabling with Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Figure 20
Option switch settings for PRI circuit card . . . . . . . . . . . . . . . . . . . . . 60
Figure 21
Option 81/81C cabling without Echo Canceller . . . . . . . . . . . . . . . . . 67
Figure 22
81/81C cabling with Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 23
Option switch settings for PRI circuit card . . . . . . . . . . . . . . . . . . . . . 69
Figure 24
QPC757 option and PRI/ISL high speed programming switch settings 89
Figure 25
QPC757 option switch settings for PRI/ISL low speed programming 90
Figure 26
MSDL card layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Figure 27 - NT5D12 faceplate - general view . . . . . . . . . . . . . . . . . . . 105
Figure 28 - DDP faceplate - detailed view . . . . . . . . . . . . . . . . . . . . . . 106
Figure 29 - DDP cabling for Meridian 1 and Meridian SL-1 systems with an
I/O panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

List of figures xiii
ISDN PRI Installation
Figure 30 - DDP cabling for Meridian SL-1 systems without an I/O panel
126
Figure 31 - Clock Controller primary and secondary tracking . . . . . . 128
Figure 32 - Clock Controller - Option 1 . . . . . . . . . . . . . . . . . . . . . . . . 133
Figure 33 - Clock Controller - Option 2 . . . . . . . . . . . . . . . . . . . . . . . . 134
Figure 34 - Clock Controller - Option 3 . . . . . . . . . . . . . . . . . . . . . . . . 135
Figure 35 - Clock Controller - Option 4 . . . . . . . . . . . . . . . . . . . . . . . . 136
Figure 36 - Switches Functional Areas . . . . . . . . . . . . . . . . . . . . . . . . 144
Figure 37 - Switch Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Figure 38
PRI to Echo Canceller cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Figure 39
ISL settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Figure 40
MSDL/ISL settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Figure 41
ISL in shared mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Figure 42
ISL dedicated mode: using leased line . . . . . . . . . . . . . . . . . . . . . . . . . 161
Figure 43
ISL dedicated mode: using dial-up Hayes Smartmodem 2400 . . . . . . 162
Figure 44
ISL dedicated mode: using PRI/DTI trunk . . . . . . . . . . . . . . . . . . . . . 165

xv
ISDN PRI Installation
List of tables
Table 1
Minimum ROM requirements by machine type and X11 release . . . . 8
Table 2
QPC720 PRI: external connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 3
QPC720 PRI: cables and cable lengths . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 4
Transmission equalization switch settings for QPC720 PRI/DTI mode 25
Table 5
Shelf and slot location of QPC720 in ST and option 21 . . . . . . . . . . . 28
Table 6
Transmission equalization switch settings for PRI . . . . . . . . . . . . . . . 29
Table 7
Cable connections and destinations for ST, STE, 21, 21E . . . . . . . . . . 30
Table 8
Shelf and slot location of QPC720 in RT . . . . . . . . . . . . . . . . . . . . . . . 36
Table 9
Transmission equalization switch settings for PRI . . . . . . . . . . . . . . . 37
Table 10
Cable connections and destinations for RT . . . . . . . . . . . . . . . . . . . . . 38
Table 11
Shelf and slot location of QPC720 in NT or option 61 . . . . . . . . . . . . 44
Table 12
Transmission equalization switch settings for PRI . . . . . . . . . . . . . . . 47

xvi List of tables
553-2901-200 Standard 11.00 August 1996
Table 13
Cable connections and destinations for NT, 51/51C, 61/61C . . . . . . . 48
Table 14
Shelf and slot location of QPC720 in XN, XT, and option 71 . . . . . . 56
Table 15
Transmission equalization switch settings for PRI . . . . . . . . . . . . . . . 61
Table 16
Cable connections and destinations for XT, 71 . . . . . . . . . . . . . . . . . . 62
Table 17
Shelf and slot location of QPC720 in 81 . . . . . . . . . . . . . . . . . . . . . . . 66
Table 18
Transmission equalization switch settings for PRI . . . . . . . . . . . . . . . 70
Table 19
Cable connections and destinations for 81/81C . . . . . . . . . . . . . . . . . . 71
Table 20
Clock Controller shelves and slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Table 21
Clock Controller switch settings for QPC471 vintage A . . . . . . . . . . . 76
Table 22
Clock Controller switch settings for QPC471 vintages B through G . 77
Table 23
Clock Controller switch settings for QPC471 vintage H . . . . . . . . . . . 78
Table 24
Clock Controller switch settings for QPC775 . . . . . . . . . . . . . . . . . . . 78
Table 25
MSDL switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Table 26 - Supported software releases on the NT5D12 . . . . . . . . . . . 100
Table 27 - DCHI/MSDL Receiver Ready control signals . . . . . . . . . . 103
Table 28 - External connectors and LEDs . . . . . . . . . . . . . . . . . . . . . . 107
Table 29 - DDP power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Table 30- NT5D16AA cable pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

List of tables xvii
ISDN PRI Installation
Table 31- NT5D17AA cable pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Table 32 - Clock Controller options- summary . . . . . . . . . . . . . . . . . . 131
Table 33 - Clock Controller options - description . . . . . . . . . . . . . . . . 132
Table 34- General purpose switch settings . . . . . . . . . . . . . . . . . . . . . 139
Table 35- Trunk interface transmission mode switch settings . . . . . . . 140
Table 36- Trunk interface line build out switch settings . . . . . . . . . . . 140
Table 37 - Trunk interface receiver impedance switch settings . . . . . . 141
Table 38- Ring ground switch settings . . . . . . . . . . . . . . . . . . . . . . . . . 141
Table 39 - DCH mode and address select switch settings . . . . . . . . . . 142
Table 40- NTBK51AA daughterboard address select switch settings . 143
Table 41
PRI to Echo Canceller pin assignments . . . . . . . . . . . . . . . . . . . . . . . . 153
Table 42
Echo Canceller operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Table 43
Echo Canceller initialization procedures . . . . . . . . . . . . . . . . . . . . . . . 154
Table 44
Pin assignment for D-channel RS-232 interface . . . . . . . . . . . . . . . . . 163
Table 45
QCAD128/NT8D83xx wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Table 46
QCAD129/NT9J93xx wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Table 47
QCAD133/NT8D83xx wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Table 48
QCAD328 wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Table 49
Card slot positions for 21/ 21E, 51/51C, 61/61C, 71, and 81/81C . . . . 179
Table 50
Card slot positions for ST, STE, RT, NT, XT . . . . . . . . . . . . . . . . . . . 180

Page 1 of 188
ISDN PRI Installation
4
Introduction
This document provides procedures to install, replace, or remove Primary
Rate Interface (PRI) circuit cards, D-channel Interface (DCHI) cards,
Multi-purpose Serial Data Link (MSDL) cards, Clock Controller cards, and
ISDN Signaling Link (ISL) equipment.
Note 1: ISDN is an evolving product. To plan your system for future
expansions, please consult with your Northern Telecom representative.
Note 2: Throughout this document, Meridian 1 refers to ST, STE, NT,
RT, and XT as well as system options 21, 21E, 51, 51C, 61, 61C, 71, 81
and 81C unless otherwise noted.
Document organization
The document is organized as follows:
PRI equipment overview
QPC757 DCHI
NT6D80 MSDL
QPC720 PRI
Clock Operation
DCHI installation
All Meridian 1 systems
Installing the QPC757 DCHI
Removing the QPC757 DCHI
MSDL installation
All Meridian 1 systems
Installing the NT6D80 MSDL
Removing the NT6D80 MSDL

Page 2 of 188 Introduction
553-2901-200 Standard 11.00 August 1996
PRI installation
The ST/STE and system option 21/21E
Installing the QPC720 PRI
Removing the QPC720 PRI
RT
Installing the QPC720 PRI
Removing the QPC720 PRI
NT, and system options 51/51C and 61/61C
Installing the QPC720 PRI
Removing the QPC720 PRI
Installing an additional network shelf
XT, and system option 71
Installing the QPC720 PRI
Removing the QPC720 PRI
System option 81/81C
Installing the QPC720 PRI
Removing the QPC720 PRI
Clock Controller
Installing the QPC471 and 775
Removing the QPC471 and 775
Echo Canceller
All Meridian 1 systems
PRI to Echo Canceller pin assignments
Echo Canceller operating parameters
Echo Canceller initialization settings
ISL installation
All systems
ISL configurations
DCHI switch settings
MSDL switch settings
Shared mode
Dedicated mode using leased line
Dedicated mode using dial-up modem
Dedicated mode using DTI or PRI trunk

Introduction Page 3 of 188
ISDN PRI Installation
PRI wire list
Nonstandard cables
QCAD128
QCAD129
QCAD133
QCAD328
NTNT26 (X11 release 18 and later)
NTND27 (X11 release 18 and later)
NTND98 (X11 release 18 and later)
References
Refer to the following documents for additional information.
— ISDN Primary Rate Interface description and administration
(553-2901-100)
— Software conversion procedures (553-2001-320)
— Circuit card installation and testing (553-3001-211)
— Spares planning (553-3001-153)
— ISDN Primary Rate Interface maintenance (553-2901-500)
— X11 input/output guide (553-3001-400)

Page 4 of 188 Introduction
553-2901-200 Standard 11.00 August 1996
Note to installers
Before beginning an installation, do the following:
— Consult the Spares planning (553-3001-153) document and follow the
instructions.
— Bring spares of all cables and boards.
—Table 49, “Card slot positions for 21/ 21E, 51/51C, 61/61C, 71, and
81/81C,” on page 179andTable 50, “Cardslotpositions for ST,STE, RT,
NT, XT,” on page 180 illustrate acceptable positions for the QPC720,
QPC414, QPC741, QPC775, QPC757, and NT6D80 cards. Use this
chart to determine where you are placing your cards before you actually
begin your installation.
— Refer to ISDN Primary Rate Interface description and administration
(553-2901-100)and X11input/outputguide (553-3001-400)fordatabase
implementation.

Page 5 of 188
ISDN PRI Installation
26
Primary Rate Interface equipment:
overview
The following machines support Primary Rate Interface (PRI):
— Beginning with X11 release 14, Meridian SL-1 ST, RT, NT, XT
— Beginning with X11 release 15, system options 21, 21A, 51, 61, and 71
— Beginning with X11 release 18, STE, 21E, and 81
— Beginning with X11 release 21, system options 51C, 71C, and 81C
This document describes the equipment and procedures needed to install the
following ISDN PRI hardware on Meridian 1 systems.
— QPC757 D-channel Interface (DCHI)
— NT6D80 Multi-purpose Serial Data Link (MSDL)
— QPC720 Primary Rate Interface (PRI)
— NT5D12 dual-port 1.5 DTI/PRI card, and associated dual-port
Downloadable D-Channel daughterboard (DDCH, NTBK51AA), that is
used with the NT5D12 DDP in system hardware configurations as an
alternative to an MSDL or a DCHI card
Note: Specific information pertaining to the NT5D12 and NTBK51AA
can be found in the separate section “NT5D12 dual-port DTI/PRI card
description and installation.”

Page 6 of 188 Primary Rate Interface equipment: overview
553-2901-200 Standard 11.00 August 1996
— QPC471 or QPC775 Clock Controller
The QPC775 Clock Controller is currently not available for U.S.
markets. The QPC471 and QPC775 Clock Controllers cannot be mixed
in one system. Vintages A through G of the QPC471 Clock Controller
can be used in one system; vintage H of QPC471 Clock Controllers
cannot be mixed with Clock Controllers of other vintages.
See Figure 1 for a representation of the basic PRI system hardware.
Note: This illustration shows the basic configuration, without the
dual-port NT5D12 DTI/PRI card, nor the associated dual-port
NTBK51AA Downloadable D-Channel daughterboard.

Primary Rate Interface equipment: overview Page 7 of 188
ISDN PRI Installation
Figure 1
PRI hardware
Clock Controller
QPC471 or QPC775
PRI
QPC720
T1 interface to
external digital
carrier
Network card
QPC414
REF1
PRI
QPC720
Loop
REF2
DCHI
QPC757
T1
553-1369
MSDL
NT6D80