CopperOptics PairGain PG-Flex Plus PCS-719 List 1A Instructions for use

PG-FLEXPLUS
TECHNICAL PRACTICE
™123-456-789-01.¨
Section 950-719-111-03
23-inch Central Office
Terminal Shelf
Model: PCS-719 List 1A
Part Number: 150-1619-11
CLEI Code: S9MTCB0A--

950-719-111-03, Revision 03
ii June 29, 2000 PCS-719 List 1A
Revision History of This Practice
©Copyright 2000 PairGain Technologies, Inc.
PairGain and PG-Plus are registered trademarks, and PG-FlexPlus, The Power Behind DSL Access and the PairGain logo design
are trademarks of PairGain Technologies, Inc. No right, license, or interest to such trademarks is granted hereunder, and you agree
that you shall assert no such right, license, or interest with respect to such trademarks. All other product names mentioned in this
document are used for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Information contained in this document is company privateto PairGainTechnologies, Inc.,and shallnot be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of PairGain.
Information furnished by PairGain Technologies is believed to be accurate and reliable. However, no responsibility is assumed by
PairGain Technologies for its use, nor for anyinfringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of PairGain Technologies. PairGain
Technologies reserves the right to change specifications at any time without notice.
Revision Release Date Revisions Made
03 June 29, 2000 Update fusing information and add HDSL backplane connection table.

950-719-111-03, Revision 03 Using This Technical Practice
PCS-719 List 1A June 29, 2000 iii
USING THIS TECHNICAL PRACTICE
Two types of messages, identified by icons, appear in the text.
INSPECTING YOUR SHIPMENT
Upon receipt of the equipment:
•Unpack each container and visually inspect the content 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 “Returning A Product” on page 43. If you must store the
equipment for a prolonged period, store the equipment in its original container.
Notes indicate information about special circumstances.
Cautions indicate the possibility of equipment damage or the possibility of personal injury.

Inspecting Your Shipment 950-719-111-03, Revision 03
iv June 29, 2000 PCS-719 List 1A

950-719-111-03, Revision 03 Table of Contents
PCS-719 List 1A June 29, 2000 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Description and Features....................................................................................................................1
Composite Clock Signals...................................................................................................................2
Backplane Connections......................................................................................................................2
Power...................................................................................................................................3
HDSL...................................................................................................................................3
Two-Wire Subscriber Circuits.............................................................................................3
Four-Wire Subscriber Circuits.............................................................................................3
COLU Edge Card Connectors.............................................................................................3
Alarm Cutoff......................................................................................................................12
Alarm Contacts..................................................................................................................12
Network Interface..............................................................................................................13
LAN Interface....................................................................................................................14
DSX1 Connections ............................................................................................................14
PAU/PMU Connector........................................................................................................15
PMX Connectors ...............................................................................................................16
Specifications...................................................................................................................................18
Installation and Test__________________________________________________________________ 19
Required Tools and Test Equipment................................................................................................19
Power ...............................................................................................................................................19
Powering the Integrated Systems ......................................................................................20
Powering the Universal Systems.......................................................................................21
Mounting..........................................................................................................................................21
Wiring Access..................................................................................................................................22
Alarm Leads.....................................................................................................................................22
HDSL Lines .....................................................................................................................................22
Subscriber Lines...............................................................................................................................22
Connections......................................................................................................................................23
Ground Connections..........................................................................................................23
Power Connections............................................................................................................23
Redundant Shelf Powering..................................................................................24
Split Shelf Powering............................................................................................25
Single Source Powering......................................................................................26
Audible and Visual Alarm Connections............................................................................27
Subscriber Connections From CO.....................................................................................29
Composite Clock Connections ..........................................................................................36

Table of Contents 950-719-111-03, Revision 03
vi June 29, 2000 PCS-719 List 1A
HDSL Wiring.................................................................................................................... 38
External ACO Connection ................................................................................................ 40
Turn-Up and Test ............................................................................................................................ 40
Abbreviations _______________________________________________________________________ 41
Product Support _____________________________________________________________________ 42
Technical Support............................................................................................................................ 42
Limited Warranty ............................................................................................................................ 42
Advance Replacement..................................................................................................................... 43
Billing.............................................................................................................................................. 43
Returning A Product........................................................................................................................ 43
FCC Compliance............................................................................................................................. 44
Modifications................................................................................................................................... 44

950-719-111-03, Revision 03 Overview
PCS-719 List 1A June 29, 2000 1
OVERVIEW
ThePairGain®PG-FlexPlus ™23-inchCentralOffice Terminal(COT)shelf,PCS-719List1A, supportsa common
management or alarm unit, two multiplexer units and up to sixteen universal or integrated PG-Plus®CentralOffice
Line Units (COLUs) or up to eight PG-FlexPlus ™Integrated Central Office Line Units (FICOLUs).
DESCRIPTION AND FEATURES
The PCS-719 provides convenient mounting of a PG-Plus Alarm Unit (PAU) or PG-Plus Management Unit
(PMU), PG-Plus Multiplexer Units (PMXs) and Central Office Line Units (COLUs). Termination points for
subscriber circuits, alarm, power,and metallic test access are located on thebackplane at the rear of the COT shelf.
All circuit boards are installed from the front of the COT shelf. The PCS-719 COT shelf accommodates the
following units (see Figure 1):
•16 COLUs or 8 FICOLUs
•Two PMXs
•One PAU or one PMU
Figure 1. Front View of the PCS-719 COT Shelf
The PCS-719 COT shelf features include:
•Mounting brackets for installation into a 23-inch equipment rack
•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
•BNC connector for inter-shelf communications
•64-pin Telco connector for four-wire service connections
•50-pin Telco connectors for two-wire service connections

Overview 950-719-111-03, Revision 03
2 June 29, 2000 PCS-719 List 1A
COMPOSITE CLOCK SIGNALS
Composite clock signals are a 64 kHz bipolar clock with 8 kHz bipolar violations, that define the bit and byte
boundaries of DDS data as it is transferred within a CO. In support of 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.
BACKPLANE CONNECTIONS
Each shelf supports the connection of up to sixteen COLUs or six FICOLUs, two PMX units, and one PAU or
PMU. The backplane of the PCS-719 List 1A contains the connectors shown in Figure 2 and Table 1. Wiring
external to the COT shelf should follow the provisions of the current edition of the National Electrical Code and
applicable local codes.
Figure 2. PCS-719 Shelf Backplane
Information in Tables 2 through 21 can be used for diagnostic and troubleshooting procedures
under the direction of an authorized PairGain technical support representative.

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PCS-719 List 1A June 29, 2000 3
The following sections identify each connector by type and function.
Power
The COT shelf backplane has a seven-position power terminal strip (TB1) that provides connections for dual
–48 Vdc, common battery return, and frame ground by way of screw terminals. The COT shelf can be wired for
redundant powering, split-powering, or single-source powering depending upon requirements.
HDSL
Each COLU slot is equipped with four wire-wrap pins for xDSL interfaces.
Two-Wire Subscriber Circuits
A total of 96 two-wire subscriber pairs terminate at the Telco connectors (P1, P2, P3, and P4) on the COT shelf
backplane. Six pairs route to each of the sixteen COLU slots. See Tables 25 through 28 for the connector pinouts.
Four-Wire Subscriber Circuits
The COT shelf provides a total of sixteen four-wire data interfaces (P5) that are separate from the two-wire pairs.
One four-wire connection is provided for each of the sixteen COLU slots. See Table 33 on page 35 for the
connector pinouts.
COLU Edge Card Connectors
Tables 2 through 17 show the backplane connector pinouts for each COLU slot.
Table 1. PCS-719 Backplane Connectors
Connector Description
J1 PAU or PMU connector
J2 PMX 1 connector
J3 PMX 2 connector
J4 - J19 COLU HDSL connectors.
The wire-wrap posts are for the
HDSL.
J20 DB-25 (RS-232) connector
J21 LAN connector
J22 Frame Ground
P1 - P4 Telco connectors for 2-wire
subscriber circuits
P5 Telco connector for 4-wire subscriber
circuits
TB1 Seven-position power terminal strip

Overview 950-719-111-03, Revision 03
4 June 29, 2000 PCS-719 List 1A
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
9 HTIPA1 HTIPB1 10
7 HRINGA1 HRINGB1 8
5FGND FGND 6
3 4WRXT1 4WRXR1 4
1 4WTXT1 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
7 HRINGA2 HRINGB2 8
5FGND FGND 6
3 4WRXT2 4WRXR2 4
1 4WTXT2 4WTXR2 2

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PCS-719 List 1A June 29, 2000 5
Table 4. COLU #3 (J6) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP13 RING13 50
47 TIP14 RING14 48
45 TIP15 RING15 46
43 TIP16 RING16 44
41 TIP17 RING17 42
39 TIP18 RING18 40
37 <BURN IN> – 38
35 CC8KA CC64KA 36
33 INTRPT3- SCB3 34
31 RDATA3 RDATB3 32
29 CLKA3 CLKB3 30
27 RSIGA3 RSIGB3 28
25 FSYNCA3 FSYNCB3 26
23 TDATA3 TDATB3 24
21 TSIGA3 TSIGB3 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_L BATA_L 16
13 BATB_L BATB_L 14
11 ––12
9 HTIPA3 HTIPB3 10
7 HRINGA3 HRINGB3 8
5FGND FGND 6
3 4WRXT3 4WRXR3 4
1 4WTXT3 4WTXR3 2
Table 5. COLU #4 (J7) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP19 RING19 50
47 TIP20 RING20 48
45 TIP21 RING21 46
43 TIP22 RING22 44
41 TIP23 RING23 42
39 TIP24 RING24 40
37 <BURN IN> –38
35 CC8KA CC64KA 36
33 INTRPT4- SCB4 34
31 RDATA4 RDATB4 32
29 CLKA4 CLKB4 30
27 RSIGA4 RSIGB4 28
25 FSYNCA4 FSYNCB4 26
23 TDATA4 TDATB4 24
21 TSIGA4 TSIGB4 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_L BATA_L 16
13 BATB_L BATB_L 14
11 ––12
9 HTIPA4 HTIPB4 10
7 HRINGA4 HRINGB4 8
5FGND FGND 6
3 4WRXT4 4WRXR4 4
1 4WTXT4 4WTXR4 2

Overview 950-719-111-03, Revision 03
6 June 29, 2000 PCS-719 List 1A
Table 6. COLU #5 (J8) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP25 RING25 50
47 TIP26 RING26 48
45 TIP27 RING27 46
43 TIP28 RING28 44
41 TIP29 RING29 42
39 TIP30 RING30 40
37 <BURN IN> –38
35 CC8KA CC64KA 36
33 INTRPT5- SCB5 34
31 RDATA5 RDATB5 32
29 CLKA5 CLKB5 30
27 RSIGA5 RSIGB5 28
25 FSYNCA5 FSYNCB5 26
23 TDATA5 TDATB5 24
21 TSIGA5 TSIGB5 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_L BATA_L 16
13 BATB_L BATB_L 14
11 ––12
9 HTIPA5 HTIPB5 10
7 HRINGA5 HRINGB5 8
5FGND FGND 6
3 4WRXT5 4WRXR5 4
1 4WTXT5 4WTXR5 2
Table 7. COLU #6 (J9) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP31 RING31 50
47 TIP32 RING32 48
45 TIP33 RING33 46
43 TIP34 RING34 44
41 TIP35 RING35 42
39 TIP36 RING36 40
37 <BURN IN> –38
35 CC8KA CC64KA 36
33 INTRPT6- SCB6 34
31 RDATA6 RDATB6 32
29 CLKA6 CLKB6 30
27 RSIGA6 RSIGB6 28
25 FSYNCA6 FSYNCB6 26
23 TDATA6 TDATB6 24
21 TSIGA6 TSIGB6 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_L BATA_L 16
13 BATB_L BATB_L 14
11 ––12
9 HTIPA6 HTIPB6 10
7 HRINGA6 HRINGB6 8
5FGND FGND 6
3 4WRXT6 4WRXR6 4
1 4WTXT6 4WTXR6 2

950-719-111-03, Revision 03 Overview
PCS-719 List 1A June 29, 2000 7
Table 8. COLU #7 (J10) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP37 RING37 50
47 TIP38 RING38 48
45 TIP39 RING39 46
43 TIP40 RING40 44
41 TIP41 RING41 42
39 TIP42 RING42 40
37 <BURN IN> –38
35 CC8KA CC64KA 36
33 INTRPT7- SCB7 34
31 RDATA7 RDATB7 32
29 CLKA7 CLKB7 30
27 RSIGA7 RSIGB7 28
25 FSYNCA7 FSYNCB7 26
23 TDATA7 TDATB7 24
21 TSIGA7 TSIGB7 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA7 HTIPB7 10
7 HRINGA7 HRINGB7 8
5FGND FGND 6
3 4WRXT7 4WRXR7 4
1 4WTXT7 4WTXR7 2
Table 9. COLU #8 (J11) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP43 RING43 50
47 TIP44 RING44 48
45 TIP45 RING45 46
43 TIP46 RING46 44
41 TIP47 RING47 42
39 TIP48 RING48 40
37 <BURN IN> –38
35 CC8KA CC64KA 36
33 INTRPT8- SCB8 34
31 RDATA8 RDATB8 32
29 CLKA8 CLKB8 30
27 RSIGA8 RSIGB8 28
25 FSYNCA8 FSYNCB8 26
23 TDATA8 TDATB8 24
21 TSIGA8 TSIGB8 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA8 HTIPB8 10
7 HRINGA8 HRINGB8 8
5FGND FGND 6
3 4WRXT8 4WRXR8 4
1 4WTXT8 4WTXR8 2

Overview 950-719-111-03, Revision 03
8 June 29, 2000 PCS-719 List 1A
Table 10. COLU #9 (J12) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP49 RING49 50
47 TIP50 RING50 48
45 TIP51 RING51 46
43 TIP52 RING52 44
41 TIP53 RING53 42
39 TIP54 RING54 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT9- SCB9 34
31 RDATA9 RDATB9 32
29 CLKA9 CLKB9 30
27 RSIGA9 RSIGB9 28
25 FSYNCA9 FSYNCB9 26
23 TDATA9 TDATB9 24
21 TSIGA9 TSIGB9 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA9 HTIPB9 10
7 HRINGA9 HRINGB9 8
5FGND FGND 6
3 4WRXT9 4WRXR9 4
1 4WTXT9 4WTXR9 2
Table 11. COLU #10 (J13) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP55 RING55 50
47 TIP56 RING56 48
45 TIP57 RING57 46
43 TIP58 RING58 44
41 TIP59 RING59 42
39 TIP60 RING60 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT10- SCB10 34
31 RDATA10 RDATB10 32
29 CLKA10 CLKB10 30
27 RSIGA10 RSIGB10 28
25 FSYNCA10 FSYNCB10 26
23 TDATA10 TDATB10 24
21 TSIGA10 TSIGB10 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA10 HTIPB10 10
7 HRINGA10 HRINGB10 8
5FGND FGND 6
3 4WRXT10 4WRXR10 4
14WTXT104WTXR102

950-719-111-03, Revision 03 Overview
PCS-719 List 1A June 29, 2000 9
Table 12. COLU #11 (J14) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP61 RING61 50
47 TIP62 RING62 48
45 TIP63 RING63 46
43 TIP64 RING64 44
41 TIP65 RING65 42
39 TIP66 RING66 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT11- SCB11 34
31 RDATA11 RDATB11 32
29 CLKA11 CLKB11 30
27 RSIGA11 RSIGB11 28
25 FSYNCA11 FSYNCB11 26
23 TDATA11 TDATB11 24
21 TSIGA11 TSIGB11 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA11 HTIPB11 10
7 HRINGA11 HRINGB11 8
5FGND FGND 6
3 4WRXT11 4WRXR11 4
1 4WTXT11 4WTXR11 2
Table 13. COLU #12 (J15) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP67 RING67 50
47 TIP68 RING68 48
45 TIP69 RING69 46
43 TIP70 RING70 44
41 TIP71 RING71 42
39 TIP72 RING72 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT12- SCB12 34
31 RDATA12 RDATB12 32
29 CLKA12 CLKB12 30
27 RSIGA12 RSIGB12 28
25 FSYNCA12 FSYNCB12 26
23 TDATA12 TDATB12 24
21 TSIGA12 TSIGB12 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA12 HTIPB12 10
7 HRINGA12 HRINGB12 8
5FGND FGND 6
3 4WRXT12 4WRXR12 4
14WTXT124WTXR122

Overview 950-719-111-03, Revision 03
10 June 29, 2000 PCS-719 List 1A
Table 14. COLU #13 (J16) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP73 RING73 50
47 TIP74 RING74 48
45 TIP75 RING75 46
43 TIP76 RING76 44
41 TIP77 RING77 42
39 TIP78 RING78 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT13- SCB13 34
31 RDATA13 RDATB13 32
29 CLKA13 CLKB13 30
27 RSIGA13 RSIGB13 28
25 FSYNCA13 FSYNCB13 26
23 TDATA13 TDATB13 24
21 TSIGA13 TSIGB13 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA13 HTIPB13 10
7 HRINGA13 HRINGB13 8
5 FGND FGND 6
3 4WRXT13 4WRXR13 4
1 4WTXT13 4WTXR13 2
Table 15. COLU #14 (J17) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP79 RING79 50
47 TIP80 RING80 48
45 TIP81 RING81 46
43 TIP82 RING82 44
41 TIP83 RING83 42
39 TIP84 RING84 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT14- SCB14 34
31 RDATA14 RDATB14 32
29 CLKA14 CLKB14 30
27 RSIGA14 RSIGB14 28
25 FSYNCA14 FSYNCB14 26
23 TDATA14 TDATB14 24
21 TSIGA14 TSIGB14 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA14 HTIPB14 10
7 HRINGA14 HRINGB14 8
5FGND FGND 6
3 4WRXT14 4WRXR14 4
14WTXT144WTXR142

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PCS-719 List 1A June 29, 2000 11
Table 16. COLU #15 (J18) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP85 RING85 50
47 TIP86 RING86 48
45 TIP87 RING87 46
43 TIP88 RING88 44
41 TIP89 RING89 42
39 TIP90 RING90 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT15- SCB15 34
31 RDATA15 RDATB15 32
29 CLKA15 CLKB15 30
27 RSIGA15 RSIGB15 28
25 FSYNCA15 FSYNCB15 26
23 TDATA15 TDATB15 24
21 TSIGA15 TSIGB15 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA15 HTIPB15 10
7 HRINGA15 HRINGB15 8
5FGND FGND 6
3 4WRXT15 4WRXR15 4
1 4WTXT15 4WTXR15 2
Table 17. COLU #16 (J19) Connector Pinouts
Pin # Assignment Assignment Pin #
49 TIP91 RING91 50
47 TIP92 RING92 48
45 TIP93 RING93 46
43 TIP94 RING94 44
41 TIP95 RING95 42
39 TIP96 RING96 40
37 <BURN IN> –38
35 CC8KB CC64KB 36
33 INTRPT16- SCB16 34
31 RDATA16 RDATB16 32
29 CLKA16 CLKB16 30
27 RSIGA16 RSIGB16 28
25 FSYNCA16 FSYNCB16 26
23 TDATA16 TDATB16 24
21 TSIGA16 TSIGB16 22
19 TSTTIP TSTRING 20
17 GND GND 18
15 BATA_H BATA_H 16
13 BATB_H BATB_H 14
11 ––12
9 HTIPA16 HTIPB16 10
7 HRINGA16 HRINGB16 8
5FGND FGND 6
3 4WRXT16 4WRXR16 4
14WTXT16 4WTXR162

Overview 950-719-111-03, Revision 03
12 June 29, 2000 PCS-719 List 1A
Alarm Cutoff
The shelf backplane provides a wire-wrap pin for connection to an external alarm cutoff circuit.
Alarm Contacts
The COT shelf provides access to the PAU/PMU alarm relays by way of wire-wrap pins on the COT shelf
backplane. Both normally open (NO) and normally closed (NC) relay operation is supported. Figure 3 shows the
configuration of the alarm relays.
Figure 3. Alarm Relay Contacts from PAU/PMU to COT Shelf Backplane Wire-Wrap Field
Relay contacts are shown when alarm is not active.
NO
COM
NC
Critical
Audible
Critical
Visual
Major
Audible
Major
Visual
Minor
Audible
Minor
Visual
Shelf
I.D
Front Panel Alarm LEDs
Front Panel ACO LED
ACO (Yellow)
Alarms from COLU & MUX Units
(via Backplane Communication)
ACO Push Button
(PAU/PMU Front Panel)
External ACO Push Button
(Backplane Rear)
NO
COM
NC
NO
COM
NC
NO
COM
NC
NO
COM
NC
NO
COM
NC
NO
COM
NC
Critical (Red)
Major (Red)
Minor (Yellow)
X
X
X
X
X
X
X
PAU
or
PMU
External Alarm Relays
Relay Key:
= Normally Open (NO)
= Normally Closed (NC)

950-719-111-03, Revision 03 Overview
PCS-719 List 1A June 29, 2000 13
Network Interface
The COT shelf supports RS-232 X.25 interfaces through a backplane-mounted DB25 connector. The rear
backplane DB-25is a female connector wired asa Data Terminal Equipment (DTE) interface. Thesignals andpin
assignmentsfor thisconnectorare listed inTable 18. This connector is for communicationwith a DCE devicesuch
as a modem. Figure 4shows the cable connections between the backplane connector and a DCE DB-25 connector.
To connect to a DTE device from the backplane connector, a null modem cable is required. Figure 5 shows the
wiring for the required null modem cable to a DB-9 and DB-25 connector. This feature requires a PMU installed
in the COT shelf. Refer to the PMU documentation for additional information on this interface.
Figure 4. Modem Connection for PCS-719 Backplane
Table 18. PCS-719 Backplane DB-25 Connector Pinouts
DB-25 Pin Signal
2Transmitted Data
3Received Data
8Carrier Detect
7Signal Common
20 Data Terminal Ready

Overview 950-719-111-03, Revision 03
14 June 29, 2000 PCS-719 List 1A
Figure 5. Null Modem Connection for PCS-719 Backplane
LAN Interface
The COT shelf supports communications between multiple shelves by means of a 10Base2 BNC LAN connector.
This feature requires a PMU installed in the COT shelf. Refer to the PMU documentation for additional
information on this interface. Figure 6 shows the 10Base2 LAN connector.
Figure 6. LAN Connector
DSX1 Connections
The COT shelf provides terminations for eight DS1 inputs from the DSX-1 cross-connect by way of wire-wrap
pins located at the bottom right hand side of the shelf backplane. The DS1 inputs are bridged to both PMX slots
to allow for 1:1 equipment protection. The 100 Ωtermination resistors are included on each of the DSX1 IN
connections.