CopperOptics PairGain PG-Flex FCS-718 User manual

PG-FLEX 19" CENTRAL OFFICE
TERMINAL SHELF
Model List Number Part Number CLEI Code
FCS-718 2 150-1318-02 VAMCDC0ARA
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING PLANT SERIES TECHNICAL PRACTICE
SECTION 363-718-102-01
Revision History of this practice.
Revision 01—May 30, 1997
A) Initial Release.

Section 363-718-102 May 30, 1997 Revision 01
ii PairGain Engineering - Plant Series PG-Flex FCS-718
TABLE OF CONTENTS
A. PRODUCT OVERVIEW................................................................................................................1
1. Description and Features....................................................................................................1
2. Specifications....................................................................................................................2
B. FUNCTIONAL DESCRIPTION.....................................................................................................2
3. Operational Capabilities ....................................................................................................2
4. Backplane Connections......................................................................................................4
C. INSTALLATION AND TEST........................................................................................................20
5. Unpacking........................................................................................................................20
6. Pre-Provisioning—HDSL Lines........................................................................................20
7. Mounting..........................................................................................................................21
8. Wiring..............................................................................................................................22
9. Turn-Up and Testing.........................................................................................................29
10. Troubleshooting..............................................................................................................29
11. Technical Support...........................................................................................................29
D. WARRANTY AND CERTIFICATION.........................................................................................30
12. Warranty.........................................................................................................................30
13. Certification....................................................................................................................30
E. ABBREVIATIONS.........................................................................................................................31
14. Abbreviations .................................................................................................................31
USING THIS TECHNICAL PRACTICE
Three types of messages, identified by icons, appear in the text:
A note informs you of special circumstances.
A caution indicates the possibility of equipment damage.
A warning indicates the possibility of personal injury.
Copyright © 1997, PairGain Technologies, Inc.
PairGain is a registered trademark, and PG-Flex is a trademark of PairGain Technologies, Inc.

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 1
A. PRODUCT OVERVIEW
1. Description and Features
1.1 The PairGain® PG-Flex™ FCS-718 List 2 19-inch Central Office Terminal (COT) Shelf
(Figure 1) supports:

one Alarm Unit or PGTC Interface Unit that is common to both systems

two PG-Flex subscriber carrier systems where each system comprises one Line Unit and from
one to six Channel Units (for a shelf maximum of two Line Units and 12 Channel Units)
Additionally, the shelf provides termination points (on the rear of the shelf) for alarms, power,
metallic bypass pairs, auxiliary power pairs when using a doubler, and subscriber circuits. The List 2
COT Shelf provides wire-wrap terminations for the subscriber circuits.
Figure 1. FCS-718 COT Shelf (Card-side, Front View)
Use the List 2 FCS-718 COT 19-inch Shelf only with a List 4x (or higher) FRE-765
Remote Terminal Enclosure.
1.2 Features of the PG-Flex FCS-718 COT Shelf are:

universal mounting brackets for installing in a 19- or 23-inch equipment bay

.045 in. wire-wrap connections for HDSL, alarm, metallic bypass pairs, and auxiliary power
pairs (when using a doubler)

screw terminal connections for frame ground and dual Central Office (CO) battery (BATT_A-,
BATT_B-)

DB-25 connector for Network Management Analysis (NMA) communications

wire-wrap terminations for CO line connections

25-pair Amphenol connector for PGTC test interface

Section 363-718-102 May 30, 1997 Revision 01
Page 2 PairGain Engineering - Plant Series PG-Flex FCS-718
2. Specifications
Electrical Characteristics
Power .......................................................................... -48 Vdc CO battery
Environmental
Operating Temperature................................................ -40° F to +150° F (-40° C to + 65° C)
Operating Humidity..................................................... 5% to 95% (non-condensing)
Operating Elevation..................................................... -200 feet to 13,000 feet (-60 m to 4,000 m)
Physical
Mounting.....................................................................19- or 23-inch equipment bay using universal
mounting brackets
Height.......................................................................... 7.00 in. (17.8 cm)
Width ..........................................................................17.25 in. (43.8 cm)
Depth........................................................................... 11.75 in. (29.9 cm)
Weight......................................................................... 11.00 lbs ( 5.0 kg)
B. FUNCTIONAL DESCRIPTION
3. Operational Capabilities
3.1 Each system (one Line Unit and from one to six Channel Units) can support up to either 24 or 32
subscriber channels. Each Channel Unit can provide four (4) or eight (8) channels, depending on the
service offered. Services offered are:

Plain Old Telephone Service (POTS)

Integrated Services Digital Network (ISDN)
A label on the FCS-718 shelf indicates numbering for the Line and Channel
Units. When the Line Units are a List 1 or 2, black numbers indicate sequential
Channel Unit numbering 1 through 12. When the Line Units are List 3 or higher,
blue numbers indicate Channel Unit numbering 1 through 6 for each system.
3.2 Tables 1 and 2 show how to utilize channels, dependent on the Channel Unit (4 or 8 channels) and
the type of subscriber service (i.e., POTS or ISDN) selected.

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 3
Table 1. Channel Unit Circuit Utilization
Channel Unit Service Configurations
Channel Unit 4-Channel POTS 8-Channel POTS 4-Channel ISDN 4-Channel DDS
T/R 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Tx
T/R 2 Ckt 2 Ckt 2 Ckt 2 Ckt 1 Rcv
T/R 3 Ckt 3 Ckt 3 Ckt 3 Ckt 2 Tx
T/R 4 Ckt 4 Ckt 4 Ckt 4 Ckt 2 Rcv
T/R 5 Ckt 5 Ckt 3 Tx
T/R 6 Ckt 6 Ckt 3 Rcv
T/R 7 Ckt 7 Ckt 4 Tx
T/R 8 Ckt 8 Ckt 4 Rcv
Table 2. Systems 1 and 2 Circuit Assignments for COT Shelf
System 1* System 2*
Line
Unit CU 1 (CU 1) CU 2 (CU2) CU 3 (CU 3) CU 4 (CU 4) CU 5 (CU 5) CU 6 (CU 6) Line Unit CU 7 (CU 1) CU 8 (CU 2) CU 9 (CU 3) CU 10 (CU 4) CU 11 (CU 5) CU 12 (CU 6)
Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1 Ckt 1
Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2 Ckt 2
Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3 Ckt 3
1 Ckt 4 Ckt 4 Ckt 4 Ckt 4 Ckt 4 Ckt 4 2 Ckt 4 Ckt 4 Ckt 4 Ckt 4 Ckt 4 Ckt 4
Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5 Ckt 5
Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6 Ckt 6
Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7 Ckt 7
Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8 Ckt 8
* CU numbers shown on top are for a List 1 or 2 Line Unit. CU numbers on the bottom in parentheses are for a
List 3 or higher Line Unit. CU is a Channel Unit.

Section 363-718-102 May 30, 1997 Revision 01
Page 4 PairGain Engineering - Plant Series PG-Flex FCS-718
4. Backplane Connections
4.1 Section 4.2 provides connector pinouts located on the backplane for an Alarm or PGTC Interface
Unit, Line Unit, and Channel Unit connectors.
Section 4.3 provides connectors and termination points located on the backplane for:

CO battery and CO return (BATT_A-, BATT_B-, Battery Return)

frame ground

Local Area Network (LAN)

data

HDSL, test, composite clock, auxiliary power pairs, and external ACO switch wire-wrap posts

alarm or PGTC test interface

subscriber lines with .045 mm wire-wrap posts (P1, P2, P3, and P4)
4.2 Table 3 lists the FCS-718 List 2 connectors (Figure 1) and where each is described in
this practice.
Table 3. FCS-718 List 2 Card Connectors
Connector/Fuse Go to
Table(s) On page
Alarm Unit or PGTC Interface Unit 4 5
Line Unit Connectors (Systems 1 and 2) 5 6
Channel Unit Connectors (System 1) 6 7 thru 9
Channel Unit Connectors (System 2) 7 10 thru 12
Use the information in tables 4 through 7 for diagnostic and troubleshooting
procedures under the direction of an authorized PairGain technical support
representative. User terminations are not required on J1.

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 5
Table 4. Alarm Unit or PGTC Interface Unit Connector
J1-C Pin J1-C Signal J1-B Pin J1-B Signal J1-A Pin J1-A Signal
1 LAN 1 LGND (CDS) 1 LGND (CDS)
2 N/C 2 INHIBIT 2 N/C
3 PGTC_TIP1 3 SLEEVE1 3 TESTIN1-T
4 PGTC_RING1 4 SLEEVE2 4 TESTIN1-R
5 PGTC_TIP2 5 SLEEVE3 5 TESTIN2-T
6 PGTC_RING2 6 SLEEVE4 6 TESTIN2-R
7 PGTC_TIP3 7 OH1 7 TESTIN3-T
8 PGTC_RING3 8 OH2 8 TESTIN3-R
9 PGTC_TIP4 9 OH3 9 TESTOUT1_T
10 PGTC_RING4 10 OH4 10 TESTOUT1-R
11 (BURN-IN) 11 PROCEED1 11 TESTOUT2-T
12 LOCK1 12 PROCEED2 12 TESTOUT2-R
13 LOCK2 13 PROCEED3 13 TESTOUT3-T
14 LOCK3 14 PROCEED4 14 TESTOUT3-R
15 LOCK4 15 SEIZE 15 TESTOUT4-T
16 TMAJ 16 SEZBY 16 TESTOUT4-R
17 +5_1 17 TSTALM 17 +5
18 NMA_TX 18 NMA_RX 18 NMA_DTR
19 NMA_DSR 19 N MA_TCLK 19 NMA_RCLK
20 NMA_BUS_1 20 NMA_BUS_2 20 TESTIN4-T
21 NMA_BUS_3 21 NMA_BUS_4 21 TESTIN4-R
22 CC1TIP 22 CC1RING 22 EXT_ACO
23 CC2TIP 23 CC2RING 23 8KHZ_CC
24 SHELF_ID_NO 24 SHELF_ID_COM 24 SHELF_ID_NC
25 MAJ_AUD_NO 25 MAJ_AUD_COM 25 MAJ_AUD_NC
26 MAJ_VIS_NO 26 MAJ_VIS_COM 26 MAJ_VIS_NC
27 MIN_AUD_NO 27 MIN_AUD_COM 27 MIN_AUD_NC
28 MIN_VIS_NO 28 MIN_VIS_COM 28 MIN_VIS_NC
29 FUSEALARM 29 MAJORALARM 29 MINORALARM
30 BATT_B- 30 N/C 30 BATT_A-
31 BATTERY+ 31 BATTERY+ 31 BATTERY+
32 PROTGND 32 GND 32 GND

Section 363-718-102 May 30, 1997 Revision 01
Page 6 PairGain Engineering - Plant Series PG-Flex FCS-718
Table 5. Line Unit Connector Pinouts
System Line Unit Connector
11 J2
2 2 J10
Pin Signal Pin Signal
1 PROTGND 2 PROTGND
3 N/C 4 N/C
5 HDSLTIP1EX 6 HDSLTIP2EX
7 HDSLRING1EX 8 HDSLRING2EX
9 N/C 10 N/C
11 BATTERY+ 12 BATTERY+
13 -48 14 -48
15 BATTERY-_n16 BATTERY-_n
17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC 20 TSIG
21 TCLK 22 TSER
23 GND 24 RSYNC
25 RSIG 26 RCLK
27 RSER 28 GND
29 SDA 30 CSYNC
31 FUSEALARM 32 SCL
33 +5 34 +5
35 GND 36 GND
37 -5 38 -5
39 NMA_BUS2 40 GND (CID3)
41 GND (CID2) 42 CID1
43 MAJORALARM 44 MINORALARM
45 TESTIN-T 46 TESTIN-R
47 TESTOUT-T 48 TESTOUT-R
49 N/C 50 N/C
51 BYPASS-T 52 BYPASS-R
53 HDSL_TIP1 54 HDSL_TIP2
55 HDSL_RING1 56 HDSL_RING2
57 N/C 58 N/C
59 PROTGND 60 PROTGND
* Where n is A on system 1 and B on system 2.

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 7
Table 6. Channel Unit Connectors for System 1
System Channel Unit Connector
11 J3 System Channel Unit Connector 12 J4
Pin Signal Pin Signal Pin Signal Pin Signal
1 PROTGND 2 PROTGND 1 PROTGND 2 PROTGND
3 TIP05_1 4 RING05_1 3 TIP13_1 4 RING13_1
5 TIP06_1 6 RING06_1 5 TIP14_1 6 RING14_1
7 TIP07_1 8 RING07_1 7 TIP15_1 8 RING15_1
9 TIP08_1 10 RING08_1 9 TIP16_1 10 RING16_1
11 BATTERY+ 12 BATTERY+ 11 BATTERY+ 12 BATTERY+
13 -48 14 -48 13 -48 14 -48
15 BATT_A- 16 BATT_A- 15 BATT_A- 16 BATT_A-
17 8KHZ_CC 18 N/C (BURN-IN) 17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC 20 TSIG 19 TSYNC 20 TSIG
21 TCLK 22 TSER 21 TCLK 22 TSER
23 GND 24 RSYNC 23 GND 24 RSYNC
25 RSIG 26 RCLK 25 RSIG 26 RCLK
27 RSER 28 GND 27 RSER 28 GND
29 SDA 30 CSYNC 29 SDA 30 CSYNC
31 N/C 32 SCL 31 N/C 32 SCL
33 +5 34 +5 33 +5 34 +5
35 GND 36 GND 35 GND 36 GND
37 -5 38 -5 37 -5 38 -5
39 N/C 40 GND (CID3) 39 N/C 40 GND (CID3)
41 GND (CID2) 42 GND (CID1) 41 GND (CID2) 42 GND (CID1)
43 GND (CID0) 44 N/C 43 N/C (CID0) 44 N/C
45 TESTIN1-T 46 TESTIN1-R 45 TESTIN1-T 46 TESTIN1-R
47 GND 48 GND 47 GND 48 GND
49 TESTOUT1-T 50 TESTOUT1-R 49 TESTOUT1-T 50 TESTOUT1-R
51 TIP01_1 52 RING01_1 51 TIP09_1 52 RING09_1
53 TIP02_1 54 RING02_1 53 TIP10_1 54 RING10_1
55 TIP03_1 56 RING03_1 55 TIP11_1 56 RING11_1
57 TIP04_1 58 RING04_1 57 TIP12_1 58 RING12_1
59 PROTGND 60 PROTGND 59 PROTGND 60 PROTGND
(continued on next page)

Section 363-718-102 May 30, 1997 Revision 01
Page 8 PairGain Engineering - Plant Series PG-Flex FCS-718
Table 6. Channel Unit Connectors for System 1 (continued)
System Channel Unit Connector
13 J5 System Channel Unit Connector 14 J6
Pin Signal Pin Signal Pin Signal Pin Signal
1 PROTGND 2 PROTGND 1 PROTGND 2 PROTGND
3 TIP21_1 4 RING21_1 3 TIP29_1 4 RING29_1
5 TIP22_1 6 RING22_1 5 TIP30_1 6 RING30_1
7 TIP23_1 8 RING23_1 7 TIP31_1 8 RING31_1
9 TIP24_1 10 RING24_1 9 TIP32_1 10 RING32_1
11 BATTERY+ 12 BATTERY+ 11 BATTERY+ 12 BATTERY+
13 -48 14 -48 13 -48 14 -48
15 BATT_A- 16 BATT_A- 15 BATT_A- 16 BATT_A-
17 8KHZ_CC 18 N/C (BURN-IN) 17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC 20 TSIG 19 TSYNC 20 TSIG
21 TCLK 22 TSER 21 TCLK 22 TSER
23 GND 24 RSYNC 23 GND 24 RSYNC
25 RSIG 26 RCLK 25 RSIG 26 RCLK
27 RSER 28 GND 27 RSER 28 GND
29 SDA 30 CSYNC 29 SDA 30 CSYNC
31 N/C 32 SCL 31 N/C 32 SCL
33 +5 34 +5 33 +5 34 +5
35 GND 36 GND 35 GND 36 GND
37 -5 38 -5 37 -5 38 -5
39 N/C 40 GND (CID3) 39 N/C 40 GND (CID3)
41 GND (CID2) 42 N/C (CID1) 41 GND (CID2) 42 N/C (CID1)
43 GND (CID0) 44 N/C 43 N/C (CID0) 44 N/C
45 TESTIN1-T 46 TESTIN1-R 45 TESTIN1-T 46 TESTIN1-R
47 GND 48 GND 47 GND 48 GND
49 TESTOUT1-T 50 TESTOUT1-R 49 TESTOUT1-T 50 TESTOUT1-R
51 TIP17_1 52 RING17_1 51 TIP25_1 52 RING25_1
53 TIP18_1 54 RING18_1 53 TIP26_1 54 RING26_1
55 TIP19_1 56 RING19_1 55 TIP27_1 56 RING27_1
57 TIP20_1 58 RING20_1 57 TIP28_1 58 RING28_1
59 PROTGND 60 PROTGND 59 PROTGND 60 PROTGND
(continued on next page)

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 9
Table 6. Channel Unit Connectors for System 1 (continued)
System Channel Unit Connector
15 J7 System Channel Unit Connector 16 J8
Pin Signal Pin Signal Pin Signal Pin Signal
1 PROTGND 2 PROTGND 1 PROTGND 2 PROTGND
3 TIP37_1 4 RING37_1 3 TIP45_1 4 RING45_1
5 TIP38_1 6 RING38_1 5 TIP46_1 6 RING46_1
7 TIP39_1 8 RING39_1 7 TIP47_1 8 RING47_1
9 TIP40_1 10 RING40_1 9 TIP48_1 10 RING48_1
11 BATTERY+ 12 BATTERY+ 11 BATTERY+ 12 BATTERY+
13 -48 14 -48 13 -48 14 -48
15 BATT_A- 16 BATT_A- 15 BATT_A- 16 BATT_A-
17 8KHZ_CC 18 N/C (BURN-IN) 17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC 20 TSIG 19 TSYNC 20 TSIG
21 TCLK 22 TSER 21 TCLK 22 TSER
23 GND 24 RSYNC 23 GND 24 RSYNC
25 RSIG 26 RCLK 25 RSIG 26 RCLK
27 RSER 28 GND 27 RSER 28 GND
29 SDA 30 CSYNC 29 SDA 30 CSYNC
31 N/C 32 SCL 31 N/C 32 SCL
33 +5 34 +5 33 +5 34 +5
35 GND 36 GND 35 GND 36 GND
37 -5 38 -5 37 -5 38 -5
39 N/C 40 GND (CID3) 39 N/C 40 GND (CID3)
41 N/C (CID2) 42 GND (CID1) 41 N/C (CID2) 42 GND (CID1)
43 GND (CID0) 44 N/C 43 N/C (CID0) 44 N/C
45 TESTIN1-T 46 TESTIN1-R 45 TESTIN1-T 46 TESTIN1-R
47 GND 48 GND 47 GND 48 GND
49 TESTOUT1-T 50 TESTOUT1-R 49 TESTOUT1-T 50 TESTOUT1-R
51 TIP33_1 52 RING33_1 51 TIP41_1 52 RING41_1
53 TIP34_1 54 RING34_1 53 TIP42_1 54 RING42_1
55 TIP35_1 56 RING35_1 55 TIP43_1 56 RING43_1
57 TIP36_1 58 RING36_1 57 TIP44_1 58 RING44_1
59 PROTGND 60 PROTGND 59 PROTGND 60 PROTGND

Section 363-718-102 May 30, 1997 Revision 01
Page 10 PairGain Engineering - Plant Series PG-Flex FCS-718
Table 7. Channel Unit Connectors for System 2
System Channel Unit Connector
2 7 (1)* J11 System Channel Unit Connector 2 8 (2)* J12
Pin Signal Pin Signal Pin Signal Pin Signal
1 PROTGND 2 PROTGND 1 PROTGND 2 PROTGND
3 TIP05_2 4 RING05_2 3 TIP13_2 4 RING13_2
5 TIP06_2 6 RING06_2 5 TIP14_2 6 RING14_2
7 TIP07_2 8 RING07_2 7 TIP15_2 8 RING15_2
9 TIP08_2 10 RING08_2 9 TIP16_2 10 RING16_2
11 BATTERY+ 12 BATTERY+ 11 BATTERY+ 12 BATTERY+
13 -48_1 14 -48_1 13 -48_1 14 -48_1
15 BATT_B- 16 BATT_B- 15 BATT_B- 16 BATT_B-
17 8KHZ_CC 18 N/C (BURN-IN) 17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC_1 20 TSIG_1 19 TSYNC_1 20 TSIG_1
21 TCLK_1 22 TSER_1 21 TCLK_1 22 TSER_1
23 GND 24 RSYNC_1 23 GND 24 RSYNC_1
25 RSIG_1 26 RCLK_1 25 RSIG_1 26 RCLK_1
27 RSER_1 28 GND 27 RSER_1 28 GND
29 SDA_1 30 CSYNC_1 29 SDA_1 30 CSYNC_1
31 N/C 32 SCL_1 31 N/C 32 SCL_1
33 +5_1 34 +5_1 33 +5_1 34 +5_1
35 GND 36 GND 35 GND 36 GND
37 -5_1 38 -5_1 37 -5_1 38 -5_1
39 N/C 40 N/ C (CID3) 39 N/C 40 N/C (CID3)
41 GND (CID2) 42 GND (CID1) 41 GND (CID2) 42 GND (CID0)
43 GND (CID0) 44 N/C 43 N/C (CID0) 44 N/C
45 TESTIN2-T 46 TESTIN2-R 45 TESTIN2-T 46 TESTIN2-R
47 GND 48 GND 47 GND 48 GND
49 TESTOUT2-T 50 TESTOUT2-R 49 TESTOUT2-T 50 TESTOUT2-R
51 TIP01_2 52 RING01_2 51 TIP09_2 52 RING09_2
53 TIP02_2 54 RING02_2 53 TIP10_2 54 RING10_2
55 TIP03_2 56 RING03_2 55 TIP11_2 56 RING11_2
57 TIP04_2 58 RING04_2 57 TIP12_2 58 RING12_2
59 PROTGND 60 PROTGND 59 PROTGND 60 PROTGND
(continued on next page)

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 11
Table 7. Channel Unit Connectors for System 2 (continued)
System Channel Unit Connector
2 9 (3)* J13 System Channel Unit Connector 2 10 (4)* J14
Pin Signal Pin Signal Pin Signal Pin Signal
1 PROTGND 2 PROTGND 1 PROTGND 2 PROTGND
3 TIP21_2 4 RING21_2 3 TIP29_2 4 RING29_2
5 TIP22_2 6 RING22_2 5 TIP30_2 6 RING30_2
7 TIP23_2 8 RING23_2 7 TIP31_2 8 RING31_2
9 TIP24_2 10 RING24_2 9 TIP32_2 10 RING32_2
11 BATTERY+ 12 BATTERY+ 11 BATTERY+ 12 BATTERY+
13 -48_1 14 -48_1 13 -48_1 14 -48_1
15 BATT_B- 16 BATT_B- 15 BATT_B- 16 BATT_B-
17 8KHZ_CC 18 N/C (BURN-IN) 17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC_1 20 TSIG_1 19 TSYNC_1 20 TSIG_1
21 TCLK_1 22 TSER_1 21 TCLK_1 22 TSER_1
23 GND 24 RSYNC_1 23 GND 24 RSYNC_1
25 RSIG_1 26 RCLK_1 25 RSIG_1 26 RCLK_1
27 RSER_1 28 GND 27 RSER_1 28 GND
29 SDA_1 30 CSYNC_1 29 SDA_1 30 CSYNC_1
31 N/C 32 SCL_1 31 N/C 32 SCL_1
33 +5_1 34 +5_1 33 +5_1 34 +5_1
35 GND 36 GND 35 GND 36 GND
37 -5_1 38 -5_1 37 -5_1 38 -5_1
39 N/C 40 N/C (CID3) 39 N/C 40 N/C (CID3)
41 GND (CID2) 42 N/C (CID1) 41 GND (CID2) 42 N/C (CID1)
43 GND (CID0) 44 N/C 43 N/C (CID0) 44 N/C
45 TESTIN2-T 46 TESTIN2-R 45 TESTIN2-T 46 TESTIN2-R
47 GND 48 GND 47 GND 48 GND
49 TESTOUT2-T 50 TESTOUT2-R 49 TESTOUT2-T 50 TESTOUT2-R
51 TIP17_2 52 RING17_2 51 TIP25_2 52 RING25_2
53 TIP18_2 54 RING18_2 53 TIP26_2 54 RING26_2
55 TIP19_2 56 RING19_2 55 TIP27_2 56 RING27_2
57 TIP20_2 58 RING20_2 57 TIP28_2 58 RING28_2
59 PROTGND 60 PROTGND 59 PROTGND 60 PROTGND
(continued on next page)

Section 363-718-102 May 30, 1997 Revision 01
Page 12 PairGain Engineering - Plant Series PG-Flex FCS-718
Table 7. Channel Unit Connectors for System 2 (continued)
System Channel Unit Connector
2 11 (5)* J15 System Channel Unit Connector 2 12 (6)* J16
Pin Signal Pin Signal Pin Signal Pin Signal
1 PROTGND 2 PROTGND 1 PROTGND 2 PROTGND
3 TIP37_2 4 RING37_2 3 TIP45_2 4 RING45_2
5 TIP38_2 6 RING38_2 5 TIP46_2 6 RING46_2
7 TIP39_2 8 RING39_2 7 TIP47_2 8 RING47_2
9 TIP40_2 10 RING40_2 9 TIP48_2 10 RING48_2
11 BATTERY+ 12 BATTERY+ 11 BATTERY+ 12 BATTERY+
13 -48_1 14 -48_1 13 -48_1 14 -48_1
15 BATT_B- 16 BATT_B- 15 BATT_B- 16 BATT_B-
17 8KHZ_CC 18 N/C (BURN-IN) 17 8KHZ_CC 18 N/C (BURN-IN)
19 TSYNC_1 20 TSIG_1 19 TSYNC_1 20 TSIG_1
21 TCLK_1 22 TSER_1 21 TCLK_1 22 TSER_1
23 GND 24 RSYNC_1 23 GND 24 RSYNC_1
25 RSIG_1 26 RCLK_1 25 RSIG_1 26 RCLK_1
27 RSER_1 28 GND 27 RSER_1 28 GND
29 SDA_1 30 CSYNC_1 29 SDA_1 30 CSYNC_1
31 N/C 32 SCL_1 31 N/C 32 SCL_1
33 +5_1 34 +5_1 33 +5_1 34 +5_1
35 GND 36 GND 35 GND 36 GND
37 -5_1 38 -5_1 37 -5_1 38 -5_1
39 N/C 40 N/C (CID3) 39 N/C 40 N/C (CID3)
41 N/C (CID2) 42 GND (CID1) 41 N/C (CID2) 42 GND (CID1)
43 GND (CID0) 44 N/C 43 N/C (CID0) 44 N/C
45 TESTIN2-T 46 TESTIN2-R 45 TESTIN2-T 46 TESTIN2-R
47 GND 48 GND 47 GND 48 GND
49 TESTOUT2-T 50 TESTOUT2-R 49 TESTOUT2-T 50 TESTOUT2-R
51 TIP33_2 52 RING33_2 51 TIP41_2 52 RING41_2
53 TIP34_2 54 RING34_2 53 TIP42_2 54 RING42_2
55 TIP35_2 56 RING35_2 55 TIP43_2 56 RING43_2
57 TIP36_2 58 RING36_2 57 TIP44_2 58 RING44_2
59 PROTGND 60 PROTGND 59 PROTGND 60 PROTGND
* CU numbers 7 through 12 are for a List 1 or 2 LU. CU numbers shown in parentheses are for a List 3 or higher LU.

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 13
4.3 Table 8 lists the FCS-718 backplane connectors (Figure 2) and where each is described in
this practice.
Table 8. FCS-718 List 2 Backplane Connectors
Connector/Fuse Go to
Table(s) On page
CO Battery, CO Battery Return, and Frame Ground 9 14
LAN 10 14
Data 11 14
HDSL, Auxiliary Power Pairs, Bypass Pair, Channel Unit Test,
Composite Clock, Frame Ground, External ACO 12 15
Alarm 13 16
System 1 Subscriber Wire-wrap Terminations 14 17
System 2 Subscriber Wire-wrap Terminations 15 18
PGTC 16 19
Figure 2. COT Shelf Backplane

Section 363-718-102 May 30, 1997 Revision 01
Page 14 PairGain Engineering - Plant Series PG-Flex FCS-718
CO BATTERY RETURN is separate from FRAME GROUND in PG-Flex.
CKT GND and CO BATTERY RETURN are connected inside the PG-FLEX Line
Unit but are not connected on the backplane.
Table 9. Battery, CO Battery Ground, and Frame Ground
Connector Type Function
TB1 -48V Screw Battery (-48 Vdc) for system 1
TB2 -48V Screw Battery (-48 Vdc) for system 2
TB3 GND Screw CO battery return
G1 Screw Frame ground
Table 10. LAN Connector
Connector Type Function
J21 BNC (Not currently used)
Table 11. Data Connector
Connector Type Function
J18 DB-25(F) (Not currently used)

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 15
Table 12. HDSL, Test, And Miscellaneous Terminations
System Connector Type Function
System n* HDSL_n_T1
HDSL_n_R1 .045 in. Wire-wrap Ti
p
and Rin
g
terminations for HDSL Pair #1 of S
y
stem nto Remote
Terminal n. -130 Vdc is sim
p
lexed on this line for
p
owerin
g
the
Remote Terminal.
System nHDSL_n_T2
HDSL_n_R2 .045 in. Wire-wrap Ti
p
and Rin
g
terminations for HDSL Pair #2 of S
y
stem nto Remote
Terminal n. +130 Vdc is sim
p
lexed on this line for
p
owerin
g
the
Remote Terminal.
System nPWR_1_T1
PWR_1_R1 .045 in. Wire-wrap S
y
stem nauxiliar
y
Power Pair #1. Used for auxiliar
y
p
ower to the RT
when using a PG-Flex doubler unit.
System nPWR_2_T2
PWR_2_R2 .045 in. Wire-wrap S
y
stem nauxiliar
y
Power Pair #2. Used for auxiliar
y
p
ower to the RT
when using a PG-Flex doubler unit.
System nBYPASS_n_T
BYPASS_n_R .045 in. Wire-wrap Termination (P10 for s
y
stem 1 and P20 for s
y
stem 2) for the metallic
bypass pair into COT System n from RT n.
System nTEST_n_T_IN
TEST_n_R_IN .045 in. Wire-wrap Test connection lookin
g
into the CO switch (P13 for s
y
stem 1 and P14 for
s
y
stem 2) for the selected subscriber for S
y
stem n. This connection must
be set up through the PG-Flex RS-232 maintenance port.
System nTEST_n_T_OUT
TEST_n_R_OUT .045 in. Wire-wrap Test connection lookin
g
into the COT channel unit (P13 for s
y
stem 1 and
P14 for s
y
stem 2) for the selected subscriber for S
y
stem n. This
connection must be set u
p
throu
g
h the PG-Flex RS-232 maintenance
p
ort.
In some a
pp
lications, this
p
air will be
j
um
p
ered to the BYPASS
p
air
from RT n.
CC1_TIP
CC1_RING
CC1_TERM
.045 in.
Wire-wrap Com
p
osite Clock #1 (P18). Used for s
y
nchronization to CO timin
g
.
When cascaded, terminate only on the last shelf in the cascade.
CC2_TIP
CC2_RING
CC2_TERM
.045 in.
Wire-wrap Com
p
osite Clock #2 (P19). Used for s
y
nchronization to CO timin
g
.
When cascaded, terminate only on the last shelf in the cascade.
FRAME_GND
CKT GND .045 in. Wire-wrap Frame ground (G1). This is isolated from CO battery return in PG-Flex.
EXT_ACO
CKT_GND .045 in. Wire-wrap External Alarm Cutoff (P16). A momentar
y
connection between
EXT_ACO and circuit ground resets PG-Flex audible alarm relays.
BATT RTN
CKT GND .045 in. Wire-wrap CO battery return (TB3). This is isolated from frame ground in PG-Flex.
SPARE P99 are spare pins.
*Where nis 1 on System 1 and 2 on System 2.

Section 363-718-102 May 30, 1997 Revision 01
Page 16 PairGain Engineering - Plant Series PG-Flex FCS-718
Table 13. Alarm Termination
Posts Contact
Post
NO*
Contact
Post
COM*
Contact
Post
NC*
FUNCTION†
SHELF_ID 1 2 3 Shelf ID indicates a major or minor shelf alarm is active
MAJ_AUD 4 5 6 Indicates a ma
j
or alarm. The alarm can be silenced usin
g
the ACO
button. Connect this rela
y
to the ma
j
or alarm audible indicator of
the CO alarm system.
MAJ_VIS 7 8 9 Indicates a ma
j
or alarm. This alarm cannot be disabled.
Connect this rela
y
to the ma
j
or alarm visual indicator of the
CO alarm system.
MIN_AUD 10 11 12 Indicates a minor alarm. The alarm can be silenced usin
g
the ACO
button. Connect this rela
y
to the minor alarm audible indicator of
the CO alarm system.
MIN_VIS 13 14 15 Indicates a minor alarm. This alarm cannot be disabled.
Connect this rela
y
to the minor alarm visual indicator of the
CO alarm system.
*
For the rela
y
contacts, NO is normall
y
o
p
ened, NC is normall
y
closed, and COM is common.
†All relays provide form “C” contacts.

Revision 01 May 30, 1997 Section 363-718-102
PG-Flex FCS-718 PairGain Engineering - Plant Series Page 17
Table 14. System 1 Subscriber Wire-Wrap Connections
CU Circuit Conn
P1 Tip Conn P1 Ring Tip Ring Conn P3 Tip Conn P3 Ring Circuit CU
1 26 1 WH/BL BL/WH 26 1 1
2 27 2 WH/OR OR/WH 27 2 2
3 28 3 WH/GN GN/WH 28 3 3
4 29 4 WH/BN BN/WH 29 4 4
1530 5 WH/SL SL/WH 30 554
631 6 RD/BL BL/RD 31 66
732 7 RD/OR OR/RD 32 77
833 8 RD/GN GN/RD 33 88
1 34 9 RD/BN BN/RD 34 9 1
2 35 10 RD/SL SL/RD 35 10 2
3 36 11 BK/BL BL/BK 36 11 3
4 37 12 BK/OR OR/BK 37 12 4
2538 13 BK/GN GN/BK 38 13 5 5
6 39 14 BK/BN BN/BK 39 14 6
7 40 15 BK/SL SL/BK 40 15 7
8 41 16 YL/BL BL/YL 41 16 8
1 42 17 YL/OR OR/YL 42 17 1
2 43 18 YL/GN GN/YL 43 18 2
3 44 19 YL/BN BN/YL 44 19 3
4 45 20 YL/SL SL/YL 45 20 4
3546 21 VI/BL BL/VI 46 21 5 6
6 47 22 VI/OR OR/VI 47 22 6
7 48 23 VI/GN GN/VI 48 23 7
8 49 24 VI/BN BN/VI 49 24 8
Shaded terminations are used only with 8 channel POTS and DDS CUs.

Section 363-718-102 May 30, 1997 Revision 01
Page 18 PairGain Engineering - Plant Series PG-Flex FCS-718
Table 15. System2 Subscriber Wire-wrap Connections
CU* Circuit Conn
P2 Tip Conn P2 Ring Tip Ring Conn P4 Tip Conn P4 Ring Circuit CU*
1 26 1 WH/BL BL/WH 26 1 1
2 27 2 WH/OR OR/WH 27 2 2
3 28 3 WH/GN GN/WH 28 3 3
74 29 4 WH/BN BN/WH 29 4 4 10
(1) 530 5 WH/SL SL/WH 30 55(4)
631 6 RD/BL BL/RD 31 66
732 7 RD/OR OR/RD 32 77
833 8 RD/GN GN/RD 33 88
1 34 9 RD/BN BN/RD 34 9 1
2 35 10 RD/SL SL/RD 35 10 2
3 36 11 BK/BL BL/BK 36 11 3
84 37 12 BK/OR OR/BK 37 12 4 11
(2) 538 13 BK/GN GN/BK 38 13 5 (5)
639 14 BK/BN BN/BK 39 14 6
7 40 15 BK/SL SL/BK 40 15 7
8 41 16 YL/BL BL/YL 41 16 8
1 42 17 YL/OR OR/YL 42 17 1
2 43 18 YL/GN GN/YL 43 18 2
3 44 19 YL/BN BN/YL 44 19 3
94 45 20 YL/SL SL/YL 45 20 4 12
(3) 546 21 VI/BL BL/VI 46 21 5 (6)
647 22 VI/OR OR/VI 47 22 6
7 48 23 VI/GN GN/VI 48 23 7
8 49 24 VI/BN BN/VI 49 24 8
* The CU numbers in
p
arentheses are for a List 3 or hi
g
her LU. The numbers not in
p
arentheses are for a List 1
or 2 LU.
Shaded terminations are used only with 8 channel POTS and DDS CUs.