ADC HiGain HRE-206 List 1 Instructions for use

HiGain
HiGain
TECHNICAL PRACTICE
HRE-206 List 1 Remote Enclosure
Part Number: 1146963
CLEI Code: T1MF50JG
HRE-206 List 2 Remote Enclosure
Part Number: 1146964
CLEI Code: T1MF60JG

LTPH-TP-1003-02, Issue 2
ii June 1, 2001 HRE-206 Lists 1 and 2
Revision History of This Practice
To order copies of this document, use document catalog number LTPH-TP-1003-02.
Copyright
June 1, 2001
© 2001 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc.
HiGain is a registered trademark of PairGain Technologies, Inc. No right, license, or interest to such trademarks is granted
hereunder, and you agree that no such right, license, or interest shall be asserted by you with respect to such trademark.
Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered
trademarks of their respective companies.
Disclaimer of Liability
Information contained in this document is company private toADC DSL Systems, Inc., and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
Issue Release Date Revisions Made
1January 18, 2001 Initial release.
2June 1, 2001 Updated backplane drawings and enclosure grounding requirements.

LTPH-TP-1003-02, Issue 2 Using This Technical Practice
HRE-206 Lists 1 and 2 June 1, 2001 iii
USING THIS TECHNICAL PRACTICE
Two types of messages, identified by icons, appear in the text.
For a list of abbreviations used in this document, refer to “Appendix C - Abbreviations” on page 19.
INSPECTING THE SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to ADC DSL Systems,
Inc. 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 ADC as described in “Returns”on page 18. If you must store the equipment for a
prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of personal injury or equipment damage.

Inspecting the Shipment LTPH-TP-1003-02, Issue 2
iv June 1, 2001 HRE-206 Lists 1 and 2

LTPH-TP-1003-02, Issue 2 Table of Contents
HRE-206 Lists 1 and 2 June 1, 2001 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................2
Applications .......................................................................................................................................2
Backplane...........................................................................................................................................2
Slot Connectors..................................................................................................................................4
Installation___________________________________________________________________________ 4
Installation Kit....................................................................................................................................4
Mounting Options..............................................................................................................................5
Desktop Mounting...............................................................................................................5
Wall Mounting.....................................................................................................................5
Turn-Up..............................................................................................................................................7
Power and Grounding _________________________________________________________________ 7
48 Volt Power Options.......................................................................................................................8
Slot Pin Assignments __________________________________________________________________ 9
HLU Alarm Output Interface...........................................................................................................13
Facility Side HDSL Connections.....................................................................................................13
CPE DS1 (G.703) Connections........................................................................................................15
Appendix A - Specifications____________________________________________________________ 17
Appendix B - Product Support _________________________________________________________ 18
Technical Support............................................................................................................................18
Returns.............................................................................................................................................18
Appendix C - Abbreviations ___________________________________________________________ 20
Certification and Warranty______________________________________________ Inside Back Cover

List of Figures LTPH-TP-1003-02, Issue 2
vi June 1, 2001 HRE-206 List 1 and 2
LIST OF FIGURES
1. HRE-206 List 1 and List 2 Remote Enclosure............................................................................................... 1
2. HRE-206 Backplane....................................................................................................................................... 2
3. Backplane Slot Connections (Slots 1 through 6)............................................................................................ 3
4. HRE-206 Slot Connectors (front view).......................................................................................................... 4
5. Chassis Assembly........................................................................................................................................... 5
6. HRE-206 Backplate........................................................................................................................................ 6
7. Wall Mounting and Bottom-Hinged View..................................................................................................... 6
8. TB8 Pin Assignment ...................................................................................................................................... 8
9. HRU Pin Assignments (all lists) .................................................................................................................... 9
10. HLU-431 AND HLU-432 Pin Assignments ................................................................................................ 10
11. ERU-412 Pin Assignments........................................................................................................................... 11
12. HDSL2 Remote Pin Assignments................................................................................................................ 12
13. System Alarm (TB8) Pin Assignments........................................................................................................ 13
14. TB1 through TB4 Pin Assignments ............................................................................................................. 13
15. TB5 and TB6 Pin Assignments.................................................................................................................... 14
16. RJ48C Pin Assignments (List 1) for Slot 1 through Slot 6 .......................................................................... 15
17. RJ48X Pin Assignments (List 2).................................................................................................................. 16
LIST OF TABLES
1. Backplane Connectors.................................................................................................................................... 3
2. Units Requiring Jumper Across TB7 ............................................................................................................. 7
3. Power Requirements for Various Plug Applications ..................................................................................... 8

LTPH-TP-1003-02, Issue 2 Overview
HRE-206 Lists 1 and 2 June 1, 2001 1
OVERVIEW
The HiGain®Remote Enclosure HRE-206 List 1 and List 2 house up to six 200-mechanics HiGain remote units
(HRUs or H2TU-Rs), one protection switching controller card (PSC-606 List 1), and an optional power supply.
The remote enclosure is used as a 1+1 (redundant) or 1+N (revertive or non-revertive) protection enclosure when
the protection switching controller card is installed. The HRE-206 must meet the following system requirements
for the protection switching application to function: HXU-358 multiplexer (software version 1.04 or higher), an
HMU-319 List 7A or 7C (version 3.06 or higher), an HRU-402 or H2TU-R-402 (List 6) remote unit, and a
PSC-606 protection switching controller card.
The HRE-206 List 1 has RJ48C DS1 connectors, and the HRE-206 List 2 has RJ48X connectors. When the
PSC-606 card is not installed, the HRE functions as a standard 6-slot enclosure.
Figure 1. HRE-206 List 1 and List 2 Remote Enclosure
The remote enclosure supports the 1+1 protection function when an HRU-402 or H2TU-R-402
(List 6) is installed in slots 5 and 6. Slot 6 is the protection slot, and slot 5 provides protection
to slot 6 in the event of a failure.
The enclosure supports a 1+N protection function when an HRU-402 or H2TU-R-402 (List 6) is
installed in protection slot 6. Any or all of the remaining slots may be occupied by any remote
unit.
For more information, see the Protection Switching Controller PSC-606 List 1 Technical
Practice, document number LTPH-TP-1006-xx.

Overview LTPH-TP-1003-02, Issue 2
2 June 1, 2001 HRE-206 Lists 1 and 2
FEATURES
The HRE-206 provides the following features:
•Six 200-mechanics (or three 400-mechanics) card slots and one 400-mechanics power supply slot
•One PSC-606 protection switching controller card slot (slot 7)
•RJ48C (List 1) or RJ48X (List 2) modular jacks for DS1 customer interface connections
•Printed-circuit backplane provides terminal block, wirewrap pin, and RJ48 connectors
•Tamperproof locking screw for security
•Accepts line powering, optional power supply, or external -48 Vdc source
•Wall, rack, or desktop mounting
•Pre-painted, cold-rolled #16 gauge steel construction
APPLICATIONS
HiGain provides a quick and cost-effective way of delivering DS1 High Capacity Digital Service (HCDS) to
customers over metallic cable pairs. The primary application of the HRE-206 remote enclosure is to house the
remote units of a HiGain DS1 transmission system for protection circuit applications.
BACKPLANE
Figure 2 shows the HRE-206 backplane. Table 1 on page 3 describes its connectors.
Figure 2. HRE-206 Backplane
Because the HRE-206 uses standard 200- and 400-mechanics slots, it can accommodate any
plug with 200 or 400 mechanics, including the HiGain HRU-412, HRU-402, and H2TU-R-402
remote units and the HLU-431 and HLU-432 line units.
SLOT 1
PROT/SLOT 6
J9
J10
J11
J12
J13
J14
PROT/6 5432 1
J6J7J8 J5 J4 J3 J2 J1
SLOT 5 SLOT 6
CPE FAC CPE FAC
SLOT 3 SLOT 4
CPE FAC CPE FAC
SLOT 1 SLOT 2
CPE FAC CPE FAC
P/S
PSC
CPE: T, R = XMT ( IN ) ; T1, R1 = RCV ( OUT)
FAC: T,R = HDLS LOOP 1 ; T1, R1 = HDSL LOOP 2
FGND27 FGND1
TB3 TB1
TB2
TB4 TB8
TB7
TB5
TB6

LTPH-TP-1003-02, Issue 2 Overview
HRE-206 Lists 1 and 2 June 1, 2001 3
Figure 3 shows the backplane wiring connections to slots 1 through 6. (For backplane connections to slot 7, refer
to the PSC-606 technical practice, document number 150-606-100-xx.)
Figure 3. Backplane Slot Connections (Slots 1 through 6)
Table 1. Backplane Connectors
Connector(s) Function
J9 through J14 RJ48C CPE jacks (List 1) or RJ48X jacks (List 2)
TB1 Terminal block connector for Slot 1 CPE (DS1) and FAC (HDSL) interfaces
TB2 Terminal block connector for Slot 2 CPE and FAC interfaces
TB3 Terminal block connector for Slot 3 CPE and FAC interfaces
TB4 Terminal block connector for Slot 4 CPE and FAC interfaces
TB5 Terminal block connector for Slot 5 CPE and FAC interfaces
TB6 Terminal block connector for Slot 6 CPE and FAC interfaces
TB7 Frame ground (FGND 1 and FGND 27) (a)
TB8 Terminal block connector for providing -48 Vdc battery return and supply for Slot 8.
(a) Pin 27 of every slot is always connected to ground. When a jumper is connected across TB7,
pin 1 and pin 27 of each slot are connected together. This attaches both pins to frame (chassis)
ground. See Table 2 on page 7 for a list of units that require pin 1 of each slot to be attached to
frame ground for proper fault protection. The enclosure is shipped without a jumper across TB7.
J1 - J6
(HLU-431 and
HLU-432 only)
56
54
52
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
55
53
51
49
47
45
43
41
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
FGND
HDSL Ring L1
DS1 RCV Ring
DS1 XMT Tip
DS1 XMT Ring
HDSL Ring L2
HDSL Tip L2
RTN
ALM NO
APS PWR
(Slots 5 and 6 only)
APS CTL
(Slots 5 and 6 only)
ALM COM
HDSL Tip L1
DS1 RCV Tip
-48 Vdc
TB7

Installation LTPH-TP-1003-02, Issue 2
4 June 1, 2001 HRE-206 Lists 1 and 2
SLOT CONNECTORS
Figure 4 shows the front view of slot connectors J1 through J6 for installing HiGain line units and HiGain remote
units. Slot connectors J7 and J8 are for installing the protection switch controller card (PSC-606) and the power
supply module respectively.
Figure 4. HRE-206 Slot Connectors (front view)
INSTALLATION
This section provides information on installing and mounting the HRE-206 List 1 and List 2.
INSTALLATION KIT
•four mounting screws
•four anchor nuts
•rack mounting brackets
A CAN wrench, not included in the installation kit, is required to open the plastic door.
J1
56
55
21
12
2
11
55 55
56 56
62 61
55
2
1
56
J2
2
1
55
56
J3
2
1
55
56
J4
2
1
55
56
J5 J6 J7 J8

LTPH-TP-1003-02, Issue 2 Installation
HRE-206 Lists 1 and 2 June 1, 2001 5
MOUNTING OPTIONS
The HRE-206 is suitable for mounting on a desktop or on a wall. Before setting up the equipment, select a location
that will provide appropriate security.
Desktop Mounting
The remote enclosure includes four standoffs on the bottom plate for desktop mounting. The standoffs create an
air gap between the bottom of the enclosure and the surface of the desk. This prevents overheating by providing
airflow through the enclosure. Do not block the airflow from the top or bottom of the unit.
Wall Mounting
To mount the enclosure on a wall, loosen the backplate and use it as a template for the four mounting holes as
follows:
1Loosen the HEX security nut on the front cover (Figure 5) with a 3/8-inch CAN wrench.
Figure 5. Chassis Assembly
2Remove the four top and bottom retaining screws that hold the backplate to the chassis.
Regardless of where the HRE-206 is mounted, ADC recommends that the frame-ground lug
(pin 27) should be connected to earth ground according to the grounding recommendations
found in Section 9 of Bellcore’s GR-1089-DEC 1996. See “Power and Grounding”on page 7 for
more information.
5.75"
7.75"
12.4"

Installation LTPH-TP-1003-02, Issue 2
6 June 1, 2001 HRE-206 Lists 1 and 2
3Use the backplate as a template to mark the wall locations for drilling the mounting holes (Figure 6).
.
Figure 6. HRE-206 Backplate
4Drill pilot holes and attach the backplate to the backboard with the four No. 10 x 5/8-inch sheet metal screws
and washers supplied with the remote enclosure.
5Attach the remote enclosure to the backplate. To allow the enclosure to hinge either up or down, remove the
bottom or top retaining screws respectively.
.
6Rotate the main chassis back into position and replace the retaining screws (Figure 7).
Figure 7. Wall Mounting and Bottom-Hinged View
When the main chassis is attached to the backplate, it can be rotated up or down to provide
access to the backplane connector and other internal areas. See Figure 7 for hinging details.
0.00"
Mounting holes
Mounting holes
CPE 1
CPE 2
CPE 3
CPE 4
CPE 5
CPE P/6
HRE-206
Top
Hinge
Top retaining
screw
Wall
Exposed
backplane
(side view)

LTPH-TP-1003-02, Issue 2 Power and Grounding
HRE-206 Lists 1 and 2 June 1, 2001 7
TURN-UP
Follow these steps to complete the turn-up procedure:
1Loosen the 216 HEX security nut on the front cover (Figure 5 on page 5) with a 3/8-inch CAN wrench.
2Remove the front cover from the chassis to expose the card slots.
3Insert the cards in the assigned slots and refer to the card’s technical practice for the appropriate turn-up
procedure. (See “Appendix B - Product Support”on page 18 for obtaining technical practice information.)
If you are using the HRE-206 to locally power one or more HRUs, see “48 Volt Power Options”on page 8.
POWER AND GROUNDING
Pin 27 of every slot is always connected to chassis ground. When a jumper is connected across TB7, pin 1 and pin
27 of each slot are connected together. This attaches both pins to frame (chassis) ground. See Table 2 below for a
list of units that require pin 1 of eachslot to be attached to frame ground forproper fault protection. The enclosure
is shipped without a jumper across TB7.
ADC recommends that the frame ground lug on the outside of the enclosure be connected to earth ground
according to the grounding recommendations found in Section 9 of Bellcore’s GR-1089-DEC 1996.
Table 2. Units Requiring
Jumper Across TB7
Unit Model Number
•All HRU-412, List xx
•HRU-612, List xx
•HLU-431, List 1, List 2
•HRU-512, List xx
•ERU-412, List xx
Failure to properly ground the enclosure can cause unsafe voltage levels to occur which can
result in the following adverse situations:
•Shock hazard to craft personnel who come into contact with the enclosure
•Damage to the installed circuits if the normal discharge path to earth ground of the
enclosure’s secondary surge voltage protection components is missing
•Bit errors due to the inability of the ungrounded enclosure to attenuate the noise-inducing
energy from stray Electromagnetic Interference (EMI) fields
•Bit errors due to crosstalk from adjacent communication equipment
In certain unusualnoise environments, it may benecessary to connect pin 17 (the HRU’s circuit
ground pin) to frame ground of the card-edge connector to remove bit errors from the DS1
payload.

Power and Grounding LTPH-TP-1003-02, Issue 2
8 June 1, 2001 HRE-206 Lists 1 and 2
48 VOLT POWER OPTIONS
When using the HRE-206 to locally power HRU plugs or HLU-431 and HLU-432 line units, -48 Vdc power is
provided at terminal block TB8, the pin assignment for which is shown in Figure 8.
Figure 8. TB8 Pin Assignment
Third party wall mount power supply can be used to provide -48 Vdc power for various plug applications, as
shown in Table 3.
Table 3. Power Requirements for Various Plug Applications
HiGain Unit Maximum Power
per Unit
Number
of Units
Power
Required
(mA) Power Supply
Input Power
AWG Wire Size(*)
(Two Inputs) (One Input)
(*) Minimum current capacity is based on 1000 circular mils per ampere.
HRU-402 3.5 watts 173 Westell 6048-01 (100 ma) 26 26
1, 2, or 3 210 Teltrend 2005 (250 ma) 26 26
4, 5, or 6 500 Troncom WPS-4806 (520 ma) 26 26
HDU-404 3 watts Unit is line powered. No locally-powered requirements.
HRU-412 6 watts 1125 Teltrend 2005 26 26
3375 Troncom WPS-4806 26 26
HLU-431 (no
doublers) 14 watts 1 3300 900 Troncom WPS-4806 Troncom WPS-4810 (1 amp) 26 26 26 22
HLU-431
(with two
doublers)
24 watts 1
2500 1000 Troncom WPS-4806 Troncom WPS-4810 26 22 22 20
HLU-432 (no
doublers) 12 watts 1 2
3, 4
250
500
1000
Teltrend 2005
Troncom WPS-4806
Troncom WPS-4810
HLU-432
(with four
doublers)
24 watts 1
2500 1000 Troncom WPS-4806 Troncom WPS-4810
The maximum power dissipation within the HRE-206 remote enclosure is limited to 40 watts to
permit reliable operation up to a maximum ambient temperature of 115 °F.
1
2
35
17
All backplane
slots
RTN
TB8
-48 Vdc

LTPH-TP-1003-02, Issue 2 Slot Pin Assignments
HRE-206 Lists 1 and 2 June 1, 2001 9
SLOT PIN ASSIGNMENTS
The following sections show the connector pin assignments of the HiGain plugs which are compatible with the
HRE-206.
Slot pin assignments for the various plugs compatible with the HRE-206 are shown in the following figures:
•Figure 9 (HRU pin assignments)
•Figure 10 on page 10 (HLU-431 and HLU-432 pin assignments)
•Figure 11 on page 11 (ERU-412 pin assignments)
•Figure 12 on page 12 (HDSL2 remote pin assignments)
Figure 9. HRU Pin Assignments (all lists)
27
25
23
21
19
17
15
13
11
9
7
3
5
1
DS1Tip
DS1Tip1
DS1Ring
DS1Ring1
Circuitground
HDSL L2Tip1
RS-232data in
-48Vdc
HDSL L2Ring1
HDSL L1Ring
HDSL L1Tip
RS-232data out
For factory testing
XMT
RCV
Chassisground
28
26
24
22
20
18
16
14
12
10
8
4
6
2
55
53
51
49
47
45
43
41
39
37
35
32 31
56
54
52
50
48
46
44
42
40
38
36
34
30
33
29
Note: Active pins are highlighted in black.
ChassisgroundChassisground
48Vdclocalpowersupply

Slot Pin Assignments LTPH-TP-1003-02, Issue 2
10 June 1, 2001 HRE-206 Lists 1 and 2
Figure 10. HLU-431 AND HLU-432 Pin Assignments
27
25
23
21
19
17
15
13
11
9
7
3
5
1
DS1Tip
DS1Ring
HDSL L2Ring1
HDSL L2Tip1
Alarm
Factoryburn-in(donotuse)
DS1Ring
Circuit ground
HDSL L1Ring
XMT
RCV
HDSL L1Tip
DS1Tip1
Chassisground
28
26
24
22
20
18
16
14
12
10
8
4
6
2
55
53
51
49
47
45
43
41
39
37
35
32 31
56
54
52
50
48
46
44
42
40
38
36
34
30
33
29
Note: Active pins are highlighted in black.
Not supported by HLU-431
*
Fusealarm
Chassisground
*
-48Vdc
48Vdclocalpowersupply

LTPH-TP-1003-02, Issue 2 Slot Pin Assignments
HRE-206 Lists 1 and 2 June 1, 2001 11
Figure 11. ERU-412 Pin Assignments
If you are installing WorldDSL remote units in the HRE-206, use only the 120 ΩG.703 ERU. The
75 ΩG.703 ERU should not be used. The 75 Ωinterface requires BNC connectors that are not
available in the HRE-206.
27
25
23
21
19
17
15
13
11
9
7
3
5
1
Tip
Tip1
Ring1
HDSL L2Tip1
HDSL L2Ring1
Ring
HDSL L1Ring
HDSL L1Tip
Chassisground
*
28
26
24
22
20
18
16
14
12
10
8
4
6
2
55
53
51
49
47
45
43
41
39
37
35
32 31
56
54
52
50
48
46
44
42
40
38
36
34
30
33
29
Circuitground
XMT
120
G.703
RCV
120
G.703
Note: Active pins are highlighted in black.
Chassis ground may be tied to earth ground according
to local practice.
*
-48Vdc
48Vdclocalpowersupply
Ω
Ω
Ω

Slot Pin Assignments LTPH-TP-1003-02, Issue 2
12 June 1, 2001 HRE-206 Lists 1 and 2
Figure 12. HDSL2 Remote Pin Assignments
27
25
23
21
19
17
15
13
11
9
7
3
5
1
DS1 Tip
DS1 Ring
Factoryuseonly
Factoryuseonly
Factoryuseonly
DS1Ring1
Circuit ground
Ring
IN
OUT
Tip
DS1 Tip1
Chassisground
*
Chassisground*
28
26
24
22
20
18
16
14
12
10
8
4
6
2
55
53
51
49
47
45
43
41
39
37
35
32 31
56
54
52
50
48
46
44
42
40
38
36
34
30
33
29
Note: Active pins are highlighted in black.
Chassis ground may be tied to earth ground according to local practice.
HDSL2 span connections vary depending on the unit list number.
*
**
Ring
Tip
HDSL2span**
HDSL2span**
-48Vdc
48Vdclocalpowersupply

LTPH-TP-1003-02, Issue 2 Slot Pin Assignments
HRE-206 Lists 1 and 2 June 1, 2001 13
HLU ALARM OUTPUT INTERFACE
When HLU-431 or HLU-432 line units are installed in the HRE-206, the system alarm relay contacts for each slot,
Normally Open (NO) and Common (COM), are bused together and made available on the Euro style terminal
block TB8. Figure 13 shows the TB8 pin assignments.
Figure 13. System Alarm (TB8) Pin Assignments
FACILITY SIDE HDSL CONNECTIONS
The HDSL facility side ports are available through the FAC ports of the Euro style screw-down terminal blocks.
Figure 14 shows the pin assignments for TB1 through TB4 (slots 1, 2, 3, and 4).
Figure 14. TB1 through TB4 Pin Assignments
1
2
22
22
22
22
22
22
30
30
30
30
30
30
ALM COM
ALM COM
ALM COM
ALM COM
ALM NO
ALM NO
ALM NO
ALM NO
TB8
S1
S2
S3
S4
S5
S6
ALM COM
ALM NO
ALM COM
ALM NO
DS1_T_Tip 1_IN TB1-TB4
Slots1-4
T
T
T 1
CPE
FAC
T 1
R
R
R1
R1
1
2
3
4
5
6
7
8
55
49
5
15
7
13
41
47
DS1_T_Ring 1_IN
DS1_R_Ring 1_OUT
HDSL Tip L1
HDSL Ring L1
HDSL Tip L2
HDSL Ring L2
DS1_R_Tip 1_OUT

Slot Pin Assignments LTPH-TP-1003-02, Issue 2
14 June 1, 2001 HRE-206 Lists 1 and 2
Figure 15. TB5 and TB6 Pin Assignments
Loop 1 connects to the Tip and Ringleads. Loop 2 connects to the Tip 1 and Ring 1 leads. To locate the appropriate
connector, see the pin assignment representations in “Slot Pin Assignments”on page 9.
If the Loop 1 and Loop 2 leads are reversed in 4-wire applications, a CHREV (Channels
Reversed) message appears in the ALARMS display field of the HiGain status screen. This
condition does not affect system operation, but should be corrected to avoid any confusion
regarding the identities of the two HDSL loops.
DS1_T_Tip_IN TB5-TB6
Slots 5 and 6
T
T
T 1
CPE
FAC
T 1
R
R
R1
R1
8
7
6
5
4
3
2
1
55
49
5
15
7
13
41
47
DS1_T_Ring_IN
DS1_R_Ring_OUT
HDSL Tip L1
HDSL Ring L1
HDSL Tip L2
HDSL Ring L2
DS1_R_Tip_OUT