Nortel QPC472 User manual

DTI/CPI Installation and data administration
Meridian 1
Digital Trunk Interface/Computer-to-PBX
Interface
Installation and data administration
Document Number: 553-2811-200
Document Release: Standard 6.0
Date: December 1994
Year Publish FCCTM
© 1991, 1994
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.
SL-1 and Meridian 1 are trademarks of Northern Telecom.

iii
DTI/CPI Installation and data administration
Revision history
September 16, 1991
Standard, release 1.0. Reissued for compliance with Northern Telecom
standard 164.0.
This document has been merged with DTI/CPI wire list (553-2811-200
Appendix 1). The information previously contained in that document is now
contained in the chapter, “Wire list,” in this document.
December 1, 1991
Standard, release 2.0. This document is reissued to include technical content
updates. Due to the extent of the changes, revision bars are omitted.
December 31, 1992
Standard, release 3.0. This document is issued to include technical updates.
Changes are noted with revision bars in the margins.
August 1, 1993
Standard, release 4.0. This document is reissued for updates and changes
resulting from X11 release 19. All updates are noted with revision bars in the
margins.
October 31, 1993
Standard, release 5.0. This document has been reorganized to enhance ease of
use and updated to reflect current technical information. Technical changes
are noted with revision bars in the margins.
December 1994
Standard, release 6.0. Reissued to include editorial changes and indexing.
Due to the extent of the changes, revision bars are not used.

v
DTI/CPI Installation and data administration
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Other documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DTI installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Equipment overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DTI interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
QPC472 DTI specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
QPC720 PRI specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cable requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Removing the DTI card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ST, STE systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
MS systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
N/NT and RT systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
XN/XT systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
21A, 21, 51, 61, 71, and 81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Echo Canceller interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Clock Controller installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Determining slots and shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Replacing a Clock Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Installing a Clock Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Starting the Clock Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Clock Controller commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installing the Clock Controller in a single group . . . . . . . . . . . . . . 36

vi Contents
553-2811-200 Standard 6.0 December 1994
Cabling requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
NT8D74 Clock Controller to InterGroup cable . . . . . . . . . . . . . . . 40
NT8D75 Clock Controller to Clock Controller cable . . . . . . . . . . . 40
NT8D79 PRI/DTI to Clock Controller cable . . . . . . . . . . . . . . . . . 41
Data administration . . . . . . . . . . . . . . . . . . . . . . . . 43
DTI data administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
CPI data administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Acceptance tests . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Self-test procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Automatic loop test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Automatic loop test procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Link diagnostic and remote loopback tests . . . . . . . . . . . . . . . . . . . 55
Link diagnostic and remote loopback test procedures . . . . . . . . . . 56
Wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
QCAD129/NT9J93xx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
QCAD133/NT8D97xx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
QCAD128/NT8D83xx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

vii
DTI/CPI Installation and data administration
List of figures
Figure 1
QPC472 DTI faceplate layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2
QPC720 PRI faceplate layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3
ST, STE cabling arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 4
Switch settings in DTI mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 5
Switch settings in DTI mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 6
MS cabling arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 7
Switch settings in DTI mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8
N/NT, 51, RT, and 61 single and half group cabling arrangement . . . 21
Figure 9
Switch settings in DTI mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 10
XN/XT and 71 cabling arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 11
DTI-to-Echo Canceller cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 12
DTI remote loopback test and DTI link diagnostic test . . . . . . . . . . . . 56

ix
DTI/CPI Installation and data administration
List of tables
Table 1
QPC472 transmission equalization SW2 switch settings for DTI . . . . 5
Table 2
QPC472 DTI external connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3
QPC720 transmission equalization SW2 switch settings
for PRI/DTI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4
SW3 options for the QPC720 PRI/DTI . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 5
QPC720 PRI external connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6
DTI cables and cable lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 7
Possible card locations by system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 8
Cable connections to the Clock Controller, Network, Patch panel,
I/O panel, and Echo Canceller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 9
DTI-to-Echo Canceller pin assignments . . . . . . . . . . . . . . . . . . . . . . . 27
Table 10
Operating parameters for the Echo Canceller . . . . . . . . . . . . . . . . . . . 27
Table 11
Settings for the 24 channels on the Echo Canceller . . . . . . . . . . . . . . . 28

x List of tables
553-2811-200 Standard 6.0 December 1994
Table 12
Clock Controller shelves and slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 13
Clock Controller switch settings for QPC471 vintage A . . . . . . . . . . . 29
Table 14
Clock Controller switch settings for QPC471 vintages B, C, D, E,
F, and G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 15
Clock Controller switch settings for QPC471 vintage H . . . . . . . . . . . 31
Table 16
Clock Controller switch settings for QPC775 . . . . . . . . . . . . . . . . . . . 31
Table 17
QCAD129/NT9J93xx wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 18
QCAD133/NT8D97xx wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 19
QCAD128/NT8D83xx wire list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Page 1 of 66
DTI/CPI Installation and data administration
2
Introduction
This document provides installation, data administration, and acceptance test
procedures for the Digital Trunk Interface and Computer-to-PBX Interface
(DTI/CPI) features.
These features are available on ST, STE, RT, MS, N, NT, XN, and XT
systems and on Meridian 1 system options 21, 21E, 51, 61, 71, and 81. The
DTI/CPI features are offered on the following X11 software releases:
— Release 5 and later software for N and XN systems
— Release 8 and later for M, NT, and XT systems
— Release 9 and later for ST systems
— Release 12 and later for RT systems
— Release 15 and later for system options 21, 21A, 51, 61, and 71
— Release 18 and later for system options 21E, STE, and 81
Note: Throughout this document, Meridian 1 refers to all Meridian
systems unless otherwise noted.
The document includes the following sections:
— DTI installation: overview of DTI hardware, interfaces, and cable
requirements, including installation and removal procedures for DTI
cards, Echo Cancellers, and Clock Controllers.
— Data administration: procedures for provisioning the DTI feature and
the CPI feature.
— Acceptance tests : acceptance test procedures for the DTI feature.
— Wirelist :informationonbuildingexternal cables of nonstandardlengths
for DTI interface applications.

Page 2 of 66 Introduction
553-2811-200 Standard 6.0 December 1994
Other documentation
Refer to the following Northern Telecom Publications for more information:
— Meridian 1 system installation procedures (553-3001-210)
— Circuit card installation and testing (553-3001-211)
— ISDN Primary Rate Interface installation (553-2901-200)
— Digital Trunk Interface/Computer-to-PBX Interface maintenance
(553-2811-500)
— X11 input/output guide (553-3001-400)
— Digital Trunk Interface/Computer-to-PBX Interface description
(553-2811-100)

Page 3 of 66
DTI/CPI Installation and data administration
42
DTI installation
This chapter describes the procedures for installing and removing DTI/CPI
equipment and Clock Controllers in a variety of systems. The descriptions
include cable requirements.
The first part of the chapter provides detailed information on the DTI card. A
section on the Echo Canceller follows the DTI information. The last part of
the chapter focuses on Clock Controllers.
Equipment overview
TheDTI connectsa Networkloop toan externalDS-1 interfacefor bothvoice
and data transmission over 24 digital channels.
The DTI interface requires a QPC472 DTI or QPC720 Primary Rate
Interface (PRI) card. Because this document deals with DTI functions, both
cards are referred to as the “DTI” card or “DTI” hardware whenever their
function is identical.
Clock Controllers synchronize the system clock rate with the clock rates of
digital switching and transmission equipment over a T1 circuit. Dual CPU
systems have two Clock Controllers: CC0 (associated with CPU 0) and CC1
(associated with CPU 1).
The standard Meridian 1 Clock Controller is the QPC471 , currently available
in vintages C, D, E, F, G, and H. Option 81 must use vintage H.
Customers outside the United States can use the QPC775 . Vintage A of the
QPC775 can be used with non-networked systems (systems linked directly to
a central office); vintage B is appropriate for networked systems (Meridian 1
to Meridian 1 configuration). Customers with option 81 systems must use
QPC775 vintage C.

Page 4 of 66 DTI installation
553-2811-200 Standard 6.0 December 1994
Note: A system cannot use both the QPC471 and the QPC775. A system
can mix Clock Controller vintages A through G. Vintage H Clock
Controllers can be used only with another vintage H Clock Controller.
DTI interfaces
The DTI card provides a connection to the DS-1 channel interface directly
through an office repeater or through an Echo Canceller.
Inthe U.S.A., FCC Part 68 regulations require Network Channel Terminating
Equipment (for example, the NTQRY551 Channel Service Unit) installed at
each connection point of a private system to a registered common carrier
trunk.
Echo Cancellers are required only if satellite transmission is used. The DTI
card provides both a T1 line interface and a control interface to link with a
signal format compatible with EIA standard RS-232-C. Both the DTI and the
Echo Canceller act as Data Terminal Equipment (DTE). The Echo
Canceller’s control protocol must conform with that of the Tellabs
Model 251.
QPC472 DTI specifications
TheQPC472 DTI only requires power and ground from thebackplane. Power
requirements are as follows:
+5 volts at 3 amperes
+12 volts at 50 milliamperes
-12 volts at 50 milliamperes

DTI installation Page 5 of 66
DTI/CPI Installation and data administration
The QPC472 DTI contains five LEDs and five external connectors. Table 1
shows the QPC472 transmission equalization SW2 switch settings for DTI
for all systems. Table 2 lists the external connectors located on the QPC472
DTI faceplate. Figure 1 illustrates the faceplate layout.
Table 1
QPC472 transmission equalization SW2 switch settings for DTI
Switch S2 settings To repeatered facility To cross-connect point
5 ON 0 - 45 m (0 - 150 ft.) 0 - 15 m (0 - 100 ft.)
2, 4, 6 ON 46 - 135 m (151 - 450 ft.) 16 - 100 m (101 - 355 ft.)
1, 3, 7 ON 136 - 225 m (451 - 750 ft.) 101 - 200 m (356 - 655 ft.)
Table 2
QPC472 DTI external connectors
Faceplate
designations Type
J1 9-pin female, D-connector
J2 9-pin female, D-connector
J3 36-pin connector
J4 15-pin female, D-connector
J5 15-pin male, D-connector

Page 6 of 66 DTI installation
553-2811-200 Standard 6.0 December 1994
Figure 1
QPC472 DTI faceplate layout
Red
alarm
Yellow
alarm
Failure
alarm
Line
active
J3
Q
P
C
4
7
2
J1
J2 J4
J5
FLR
ACT
R ALM
Y ALM
LP BK
To T1
trunk
To Echo
Canceller port
Loopback
test
PRI or NT8D79xx to QPC720 PRI
secondary reference
J1
J2 PRI or NT8D79xx to QPC720 PRI
primary reference
J3 Half group - no connection
N/NT single group QCAD125 or NT8D75xx
to QPC471 Clock Controller
XN/XT QCAD110 or NT8D74xx to QPC417
553-1330

DTI installation Page 7 of 66
DTI/CPI Installation and data administration
QPC720 PRI specifications
The QPC720 PRI card can replace the QPC472 DTI. The two cards are
compatible using X11 release 5 and later software.
The QPC720 PRI requires power and ground from the backplane only. Power
requirements are as follows:
+5 volts at 6 amperes
+12 volts at 50 milliamperes
-12 volts at 50 milliamperes
The QPC720 PRI contains five LEDs and six external connectors. Table 3
shows the transmission equalization SW2 switch settings and Table 4 shows
SW3 options. Table 5 lists the external connectors located on the QPC720
PRI faceplate and Figure 2 shows the faceplate layout.
Table 3
QPC720 transmission equalization SW2 switch settings for PRI/DTI
Switch S2 settings To repeatered facility To cross-connect point
5 ON 0 - 45 m (0 - 150 ft) 0 - 30 m (0 - 100 ft)
2, 4, 6 ON 46 - 135 m (151 - 450 ft) 31 - 100 m (101 - 355 ft)
1, 3, 7 ON 136 - 225 m (451 - 750 ft) 101 - 200 m (356 - 655 ft)

Page 8 of 66 DTI installation
553-2811-200 Standard 6.0 December 1994
Table 4
SW3 options for the QPC720 PRI/DTI
Switch 3 options for PRI/DTI mode
SW3-1 ON
OFF = =extended superframe format (ESF) superframe format (SF)
SW3-2 ON
OFF = =B8ZS line encoding (required for 64 kbs) AMI line encoding
SW3-3 ON
OFF = =facility data link (FDL) yellow alarm method (cannot be used in Canada) Digit 2 yellow alarm method
Note 1: All switch positions for S2 (location B22) are OFF except as shown under the column labeled
“Switch S2 settings.” The switch positions of the 8-pole SW3 (location E37) are OFF for DTI mode. For PRI
mode, set SW3 positions as configured in LD 17.
Note 2: For D2, D3, or D4 framing formats (superframe formats), set all SW3 options to OFF.
Note 3: ESF and B8ZS applies only to the 1.5 Mbps DTI. DTI2/PRI2 is not supported.
Table 5
QPC720 PRI external connectors
Faceplate designation Type
J1 9-pin female, D-connector
J2 9-pin female, D-connector
J3 36-pin connector
J4 15-pin male, D-connector
J5 15-pin male, D-connector
J6 15-pin female, D-connector
RCV MON Miniature bantam jack
XMT MON Miniature bantam jack

DTI installation Page 9 of 66
DTI/CPI Installation and data administration
Figure 2
QPC720 PRI faceplate layout
553-1332
(T1)
J4:
T1 interface to
the external
digital carrier
DIS: Card disabled
Line active
ACT:
Red alarm
RED:
Yellow alarmYEL:
Loopback testLBK:
RCV
MON An access point to the
regenerated DS-1 signal
from the external network
An access point to the
DS-1 signal being
transmitted by
the DTI assembly
XMT
MON
Buffered recovered
clocks derived from
the external carrier
facilities
J1/J2:
(Ref 1 & 2)
Standard 18-pair
connector to the
Meridian 1
network loop
J3:
(Loop)
J5:
(DCHI)
Not used in DTI
J6:
(RS232 or NT8D89Ax)
Interface to Echo
Canceller (needed only
with satellite
transmission)
Q
P
C
7
2
0
J5
J3
MO
N
J1
J2 J4
RCV
XMT
J6

Page 10 of 66 DTI installation
553-2811-200 Standard 6.0 December 1994
Cable requirements
Shielded 22 AWG (0.644 mm) cable is recommended for connecting the DTI
to the cross-connect point (or a CPI to CPI connection). This cable consists
of two shielded twisted-pair conductors and two shields.
The transmit and receive pairs must be individually shielded and enclosed in
a polyvinyl jacket. This type of cable is commonly referred to as
“6-conductor” cable. T1 cable shielding should be grounded at the
cross-connect point.
To install a private T1 transmission cable, consult the Northern Telecom
Transmission Division. To manufacture cables of different lengths than the
standard cables provided, see “Wire list” on page 57. Table 6 lists the types
of cable used and the lengths required for internal and external DTI
connections.
Table 6
DTI cables and cable lengths
Cable type From To Maximum
length (feet) Maximum length (meters)
QCAD130
NT8D79xx QPC472 QPC720 QPC471 QPC775
(CC-0)
10 3.04
QCAD130
NT8D79xx QPC472 QPC720 QPC471 QPC775
(CC-1)
10 3.04
QCAD124
NT8D85xx QPC472 QPC720 QPC414 Network 45 13.71
QCAD128
NT8D83xx QPC472 QPC720 Bulkhead I/O panels 25 7.62
RS-232
NT8D89Ax QPC472 QPC720 Echo Canceller 50 15.25
22AWG Echo Canceller DSX-1 655 199.64
NT8D97xx I/O panel T1 I/O 50 15.25

DTI installation Page 11 of 66
DTI/CPI Installation and data administration
Installation procedures
The DTI/PRI card occupies two adjacent slots on a shelf. Locations vary as
shown in Table 7.
Table 7
Possible card locations by system
System Shelf/Module Slot
ST, STE CE
DTI expansion 5-12 2-8
MS CE
CE expansion 5-12 2-9, 11-12, 12-13
N/NT/RT Network (LH)
Network (RH)
DTI expansion (RT only)
5-12
2-10
2-8
XN/XT Network (LH)
Network (RH) 4-10 5-11
Option 21A CE/PE Net: 4-8
Option 21 CE/PE Net: 4-8
RPE: 1, 11-12
Options 51,61 CPU/Net 1-8
RPE:1, 11,12
Option 71 CPU 15-16
Net: 2, 5-9, 13-14
RPE: 1, 11-12

Page 12 of 66 DTI installation
553-2811-200 Standard 6.0 December 1994
Table 8 shows the cable connections for the different systems. Not all cables
apply to every system; read the Comments section carefully.
Table 8
Cable connections to the Clock Controller, Network, Patch panel, I/O panel, and Echo
Canceller (Part 1 of 2)
Cable
type From CON To DES CON Comments
QCAD130
NT8D79xx QPC720/
QPC472 J1 J1 QPC471 QPC775 CC-0 J2 Run only when DTI is primary reference clock
source
QCAD130
NT8D79xx QPC720/ QPC472 J1 QPC471 CC-0 J1 Run only when DTI is secondary reference clock
source.
QCAD130
NT8D79xx QPC720 J2 QPC471 CC-1 J2 Only when primary clock source.For RT in
Single-Group mode only;
not for ST, STE, or MS.
QCAD130
NT8D79xx QPC720 J2 QPC471 CC-1 J1 Only when secondary clock source. For N/NT/RT
in Single-Group mode only;
not for ST, STE, or MS.
QCAD110
NT8D74xx QPC471 QPC775 J3 QPC417 SCG0 SCG1 Applies only to XN/XT
QCAD125
NT8D75xx QPC471 J3 QPC471 CC-1 J3 Applies only to N/NT/RT Single-Group mode.
QCAD124
NT8D85xx QPC720/ QPC472 J3 Network Run to connector on associated Network card.
(For Half-Group mode only
for the MS; for
Single-Group mode only
for the N/NT/RT).
QCAD124
NT8D85xx QPC720/ QPC472 J3 Network Run to connector on associated Network card.
Applies only to N/NT/RT
Half-Group mode.

DTI installation Page 13 of 66
DTI/CPI Installation and data administration
Follow the steps below to install the card:
1 Determine the cabinet and shelf location of the card to be installed.
2 Unpack and inspect cards.
3 Set option switches on the QPC472 as shown in Table 1. For the
QPC720, refer to the switch and connector information in Table 3 and
Table 4.
4 Install the card into the appropriate slot as shown in Table 7, “Possible
card locations by system,” on page 11.
5 Install Network card.
6 If required, install I/O adapters in I/O panel.
QCAD133
NT8D83xx I/O Panel Patch panel Run via cabinet I/O panel to cross-connect terminal or
Echo Canceller from
shielded system.
QCAD133
NT8D83xx QPC720/ QPC472 J4 J5 Patch panel Run via cabinet I/O panel to cross-connect terminal or
Echo Canceller from
non-shielded system.
QCAD129
NT9J93xx QPC720/ QPC472 J6 J4 I/O Panel Run via cabinet I/O panel to cross-connect terminal or
Echo Canceller from
shielded system.
RS232
NT8D89xx I/O Panel Echo Canceller Run via cabinet I/O panel to cross-connect terminal or
Echo Canceller from
shielded system.
RS232
NT8D89xx QPC720/ QPC472 J6 J4 Echo Canceller Run to cross-connect terminal or Echo Canceller
from shielded system.
Table 8
Cable connections to the Clock Controller, Network, Patch panel, I/O panel, and Echo
Canceller (Part 2 of 2)
Cable
type From CON To DES CON Comments