CopperOptics Pairain PG-Plus PCS-719 User manual

PG-PLUS
23-INCH CENTRAL OFFICE TERMINAL SHELF
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
SECTION 950-719-100-03
Revision History of this practice.
Revision 03—September 2, 1997
A) Added Pin Assignment Table
B) Corrected Connection process
Model List Number Part Number CLEI Code
PCS-719 1 150-1619-01 S9MTAB0ARA

Revision 03 September 2, 1997 Section 950-719-100
Page ii PairGain Engineering - Plant Series PG-Plus PCS-719
©Copyright 1997 PairGain® Technologies, Inc.
PairGain is a registered trademark, and PG-Plus is a trademark of PairGain Technologies, Inc.
Other product names mentioned in this manual are used for identification purposes only and may be trademarks and/or registered
trademarks of their respective Information contained in this document is company private to PairGain Technologies, Inc. and shallnot
be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of PairGain.

Section 950-719-100 September 2, 1997 Revision 03
PG-Plus PCS-719 PairGain Engineering - Plant Series Page iii
TABLE OF CONTENTS
Using This Technical Practice.................................................................................................................................... iv
Inspecting Your Shipment.......................................................................................................................................... iv
PCS-719 Overview ....................................................................................................................................................... 1
Description and Features ..........................................................................................................................................................1
Theory of Operation ................................................................................................................................................................. 2
Data Channel Overview ....................................................................................................................................................2
Serial Communications Bus .............................................................................................................................................3
Composite Clock Signals ..................................................................................................................................................3
Test Bus ............................................................................................................................................................................3
Communication Requests .................................................................................................................................................3
Backplane Connections ............................................................................................................................................................ 4
Power ................................................................................................................................................................................5
COLU HDSL ....................................................................................................................................................................5
Two-Wire Subscriber Pairs ..............................................................................................................................................5
Four-Wire Pairs ................................................................................................................................................................5
COLU Edge Card Connectors ..........................................................................................................................................6
Alarm Cutoff ..................................................................................................................................................................13
Alarm Contacts ...............................................................................................................................................................14
OS Interface ....................................................................................................................................................................14
LAN Interface .................................................................................................................................................................14
DSX1 Connections .........................................................................................................................................................15
PAU/PMU Connector .....................................................................................................................................................15
PMX Connector ..............................................................................................................................................................16
Specifications .........................................................................................................................................................................18
Installation and Test .................................................................................................................................................. 18
Required Tools and Test Equipment ......................................................................................................................................18
Power ......................................................................................................................................................................................18
Mounting ................................................................................................................................................................................18
Wiring Access ........................................................................................................................................................................19
Alarm Leads ...........................................................................................................................................................................19
HDSL Lines ............................................................................................................................................................................19
Subscriber Lines .....................................................................................................................................................................19
Connections ............................................................................................................................................................................19
Ground Connections .......................................................................................................................................................19
Power Connections .........................................................................................................................................................20
Redundant-Shelf Powering .............................................................................................................................21
Split-Shelf Powering .......................................................................................................................................22
Single-Source Powering .................................................................................................................................23
Audible and Visual Alarm Connections .........................................................................................................................24
Subscriber Connections From CO ..................................................................................................................................25
Composite Clock Connections .......................................................................................................................................32
HDSL Wiring .................................................................................................................................................................33
External ACO Connection ..............................................................................................................................................34
Turn-Up and Test ...................................................................................................................................................................34
Product Support .........................................................................................................................................................35
Technical Support ...................................................................................................................................................................35
Warranty .................................................................................................................................................................................35
FCC Compliance ....................................................................................................................................................................35
Modifications ..........................................................................................................................................................................36
Abbreviations ............................................................................................................................................................. 36

Revision 03 September 2, 1997 Section 950-719-100
Page iv PairGain Engineering - Plant Series PG-Plus PCS-719
USING THIS TECHNICAL PRACTICE
Three types of messages, identified by icons, appear in the text:
INSPECTING YOUR SHIPMENT
Upon receipt of the equipment:
• Unpack each container and visually inspect it for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to PairGain. Order
replacement equipment, if necessary.
• Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact PairGain as described in the Warranty. If you must store the equipment for a prolonged
period, store the equipment in its original container.
A note informs you of special circumstances.
A caution indicates the possibility of equipment damage.
A warning indicates the possibility of personal injury.

Section 950-719-100 August 22, 1997 Revision 03
PG-Plus PCS-719 PairGain Engineering - Plant Series Page 1
PCS-719 OVERVIEW
This practice describes the PairGain PG-Plus PCS-719 List 1B Central Office Terminal 23-inch shelf (COTS) which
supports up to sixteen PG-Plus subscriber carrier systems.
DESCRIPTION AND FEATURES
The PCS-719 provides convenient mounting of COTS Plus Alarm Unit (PAUs) and Central Office Line Units
(COLUs); and furnishes termination points for subscriber circuits, alarm, power, and metallic test access. All circuit
boards are installed from the front of the shelf. Interconnections for PG-Plus units are located on the backplane at the
rear of the shelf. The PCS-719 COTS accommodates the following PG-Plus units (see Figure 1):
•16COLUs
• Two Multiplexer Units (PMX)
• One PAU or one PG-Plus Management Unit (PMU) (interchangeable)
Figure 1
PCS-719 COTS
The COTS features:
• Wire-wrap connections for HDSL, alarm cutoff, and alarm relays
• Screw terminal connections for frame ground and Central Office (CO) battery
• DB-25 connector for network communications
• 64-pin Telco connector for four-wire service connections
• 50-pin Telco connector for CO lines

Revision 03 August 22, 1997 Section 950-719-100
Page 2 PairGain Engineering - Plant Series PG-Plus PCS-719
THEORY OF OPERATION
Data Channel Overview
The COTS backplane uses redundant Pulse Code Modulation (PCM) transmit and receive buses and Serial
Communications buses (SCB) for data transfer and intra-shelf communications. Individual clock, data, and
synchronization buses originate from the PMX cards and terminate at each COLU position. The COTS provides the
signal connectivity and -48 V dc power distribution in the COTS. Figure 2 shows the backplane signal
interconnection.
Figure 2
Backplane Signal Configuration

Section 950-719-100 August 22, 1997 Revision 03
PG-Plus PCS-719 PairGain Engineering - Plant Series Page 3
Serial Communications Bus
The Serial Communications Bus (SCB) provides the means for the PAU/PMU to communicate with all other boards
in the COTS to allow:
• Software downloads
• Coordination of PMX equipment protection
• Generation of status, alarm, and performance reports through the PG-Plus Console menus
• Provisioning of each unit installed in the shelf through the PG-Plus Console menus
The serial bus operates in a master/slave polled environment with the PAU/PMU functioning as theSCB master.Each
COLU position has its own SCB connection to avoid conflict. The SCB acts as the “card present” line to notify the
PAU/PMU board that a line unit is present in the shelf. Figure 3 shows the communication line between the
PAU/PMU and any COLU. If a COLU is not installed, the line is pulled high to notify the PAU/PMU that a line unit
is not present and data should not be sent. When installed, each card pulls its line low.
Figure 3
Communication Line Between PAU/PMU and COLU
Composite Clock Signals
Composite clock signals are a 64 kHz bipolar clock with 8 kHz bipolar violations. The 64 kHz clock and the 8 kHz
violations define the bit and byte boundaries of DDS data as it is transferred within a CO. In support of the DDS
interfaces, PG-Plus defines two composite clock interfaces at the PAU/PMU card slot. The PAU/PMU selects the
clock and translates it into bit and byte clocks, which it then distributes to the COLUs. Wire-wrap pins on the
backplane allow the composite clock source to be terminated or daisy-chained to another shelf.
Test Bus
The Test Bus provides a common Tip/Ring bus from the COLUs to the PAU/PMU. This bus allows the PAU/PMU
to provide a resistive signature to any of the tested subscriber circuits.
Communication Requests
The COTS provides communication requests from each of the cards to the PAU/PMU slot. These signals are used by
the COLU and PMX units to initiate communication with the PAU/PMU.

Revision 03 August 22, 1997 Section 950-719-100
Page 4 PairGain Engineering - Plant Series PG-Plus PCS-719
BACKPLANE CONNECTIONS
Each COTS supports the connection of up to sixteen COLUs, two PMX units and one PAU/PMU. The backplane of
the PCS-719 COTS contains the connectors shown in Figure 4 and Table 1. Wiring external to the COTS should
follow the provisions of the current edition of the National Electrical Code and applicable local codes.
Figure 4
PCS-719 Shelf Backplane
The following sections identify each connector by type and function.
Information in Tables 2 through 20 can be used for diagnostic and troubleshooting procedures
under the direction of an authorized PairGain technical support representative.
Table 1
Backplane Connectors
Connector Description
J1 PAU or PMU connector
J2 PMX 1 connector
J3 PMX 2 connector
J4 - J19 COLU HDSL connectors
J20 DB-25 (RS-232) connector
J21 LAN connector
J22 Frame Ground
P1 - P4 Telco connectors for 2-wire interfaces
P5 Telco connector for 4-wire interfaces
TB1 Seven-position power-terminal strip

Section 950-719-100 August 22, 1997 Revision 03
PG-Plus PCS-719 PairGain Engineering - Plant Series Page 5
Power
The COTS backplane has a seven-position power-terminal strip (TB1) that provides connections for dual -48 V dc,
common battery return, and frame ground to each of the card slots by way of screw terminals. The COTS can be wired
for redundant powering, split-powering, or single-source powering depending upon requirements.
COLU HDSL
There are sixteen sets of wire-wrap HDSL interfaces on the COTS backplane, one for each COLU slot (J4 - J15 where
J4 corresponds to slot LU1, and J19 corresponds to slot LU16). Each COLU slot is also equipped with a second pair
of HDSL wire-wrap pins for future XDSL configurations.
Two-Wire Subscriber Pairs
A total of 96 two-wire subscriber pairs terminate at the Telco connectors (P1, P2, P3, and P4) on the PG-Plus COTS
backplane. Six pairs route to each of the sixteen COLUs. See Tables 26 through 30 for P1, P2, P3, and P4 connector
pinouts.
Four-Wire Pairs
The COTS provides a total of sixteen four-wire data interfaces for services such as DDS or Ethernet. They are
segregated from the two-wire pairs on a separate Telco connector (P5, see Table 30). One four-wire connection is
provided for each COLU slot.

Revision 03 August 22, 1997 Section 950-719-100
Page 6 PairGain Engineering - Plant Series PG-Plus PCS-719
COLU Edge Card Connectors
Tables 2 through 17 show the backplane connector pinouts for each COLU slot.
Table 2
COLU #1 (J4) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP1 RING1 50
47 TIP2 RING2 48
45 TIP3 RING3 46
43 TIP4 RING4 44
41 TIP5 RING5 42
39 TIP6 RING6 40
37 <BURN IN> – 38
35 CC8KA CC64KA 36
33 INTRPT1- SCB1 34
31 RDATA1 RDATB1 32
29 CLKA1 CLKB1 30
27 RSIGA1 RSIGB1 28
25 FSYNCA1 FSYNCB1 26
23 TDATA1 TDATB1 24
21 TSIGA1 TSIGB1 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_L BATA_L 16
13 BATB_L BATB_L 14
11 –– 12
9HTIPA1 HTIPB1 10
7HRINGA1 HRINGB1 8
5FGND FGND 6
34WRXT1 4WRXR1 4
14WTXT1 4WTXR1 2
Table 3
COLU #2 (J5) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP7 RING7 50
47 TIP8 RING8 48
45 TIP9 RING9 46
43 TIP10 RING10 44
41 TIP11 RING11 42
39 TIP12 RING12 40
37 <BURN IN> – 38
35 CC8KA CC64KA 36
33 INTRPT2- SCB2 34
31 RDATA2 RDATB2 32
29 CLKA2 CLKB2 30
27 RSIGA2 RSIGB2 28
25 FSYNCA2 FSYNCB2 26
23 TDATA2 TDATB2 24
21 TSIGA2 TSIGB2 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_L BATA_L 16
13 BATB_L BATB_L 14
11 ––12
9
HTIPA2 HTIPB2 10
7HRINGA2 HRINGB2 8
5FGND FGND 6
34WRXT2 4WRXR2 4
14WTXT2 4WTXR2 2