ADTRAN 6540 Instruction Manual

SHDSL 2-Wire/4-Wire
NTU Product Series
Installation and Maintenance Practice
Document Number: 61230001L1-5C
December 2006
®

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
ii 61230001L1-5C
Front Matter
Trademarks
Any brand names and product names included in this document are trademarks, registered
trademarks, or trade names of their respective holders.
To the Holder of this Document
The contents of this document are current as of the date of publication. ADTRAN®reserves the
right to change the contents without prior notice.
In no event will ADTRAN be liable for any special, incidental, or consequential damages or
for commercial losses even if ADTRAN has been advised thereof as a result of issue of this
document.
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
[phone]
©2006 ADTRAN, Inc.
All Rights Reserved.
®

61230001L1-5C iii
Revision History
Conventions
The following typographical conventions are used in this document:
This font indicates a cross-reference link.
This font indicates screen menus, fields, and parameters.
THIS FONT indicates keyboard keys (ENTER, ESC, ALT). Keys that are to be pressed simultaneously
are shown with a plus sign (ALT+Xindicates that the ALT key and Xkey should be pressed at the
same time).
This font indicates references to other documentation and is also used for emphasis.
This font indicates on-screen messages and prompts.
This font indicates text to be typed exactly as shown.
This font indicates silk-screen labels or other system label items.
This font is used for strong emphasis.
NOTE
Notes inform the user of additional, but essential, information or
features.
CAUTION
Cautions inform the user of potential damage, malfunction, or
disruption to equipment, software, or environment.
WARNING
Warnings inform the user of potential bodily pain, injury, or death.
Revision Date Description
AAugust 2003 Initial release
BJune 2004 Revise to include feature modifications
CDecember 2006 Revise to include TSCAN feature, Firmware System Release v1.68

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
iv 61230001L1-5C
Training
ADTRAN offers training courses on our products. These courses include overviews on product
features and functions while covering applications of ADTRAN product lines. ADTRAN
provides a variety of training options, including customized training and courses taught at our
facilities or at customer sites.
For inquiries concerning training, contact ADTRAN:
Training Phone: [phone], ext. 7500
Training Fax: [phone]
Training Email: [email protected]

61230001L1-5C v
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SHDSL 2-Wire/4-Wire Mode, Line Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Shipping Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front Panel Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pushbutton and LED Indicator Interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AC Powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DC Powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Span Powering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SHDSL Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
G.703 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Nx64K Port V.35, ISO 2593, 34-pin Female Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
V.36 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
X.21 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Optioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Timeslot Cross-Connect Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Timeslot Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Timing Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Local and Remote Loopbacks for Ports and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Bit Error Rate Tester (BERT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Searching for Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
BERT Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Bad Splice Detection (TScan‰) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Managing TScan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Bad Splice Detection (TSCAN) Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Restart Bad Splice Detector Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Bad Splice Detection (TSCAN) 24 Hour Counts Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Appendix A
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Warranty and Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
vi 61230001L1-5C
ADTRAN Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
ADTRAN Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
ADTRAN Repair/CAPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Repair and Return Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Figures
Figure 1. Typical System Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 2. Typical Campus Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 3. Compliance Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 4. Front Panel for 6540 and 6541 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5. Front Panel for 6542 Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 6. Rear Panel for Model 6540, AC Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7. Rear Panel for Model 6540, DC Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8. Rear Panel for Model 6541, AC Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 9. Rear Panel for Model 6541, DC Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 10. Rear Panel for Model 6542, Span or DC Powered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 11. Contiguous Time Slot Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 12. Non-Contiguous Time Slot Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 13. Timing Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 14. 6500 Series Menu Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15. BERT and Remote Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 16. BERT with Remote BERT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 17. Bad Splice Detection (TSCAN) Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 18. Restart Bad Splice Detector Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 19. Bad Splice Detection (TSCAN) 24 Hour Counts Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Tables
Table 1. SHDSL 2-Wire/4-Wire NTU Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. 2-Wire/4-Wire Multi-Rate Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 3. Product Feature Set Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 4. Pushbutton Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 5. LED Indicator Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. LED Indication - No Port Selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 7. LED Indication - G.703 Port Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 8. Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 9. SHDSL Port RJ-45 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 10. G.703 Port RJ-45 Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 11. Nx64k Port V.35 34-Pin Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 12. V.35 to V.36 Adapter Cable Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 13. X.21 Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 14. Loopback Test Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Contents
61230001L1-5C vii
Table 15. KEY to Symbols used in Table 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 16. Bad Splice Detection (TSCAN) Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 17. Restart Bad Splice Detector Screen Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 18. SHDSL 2-Wire/4-Wire NTU Product Series Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
viii 61230001L1-5C

61230001L1-5C 1
SHDSL 2w4w NTU
Product Series
INTRODUCTION
This practice is an installation and maintenance guide for the SHDSL 2-Wire/4-Wire NTU
Product Series. Table 1 lists the SHDSL 2w4w NTU modules in the series.
Note: The 6540 and 6541 model sets are separate AC or DC powered versions of the same base product (for
example, P/Ns 1230001 and 1230002; 1230007 and 1230008).
Description
The SHDSL 2w4w NTU provides an interface between the SHDSL network and the user Data
Terminal Equipment (DTE), for applications such as LAN-to-LAN bridging, Frame Relay
circuit, and PABX termination. The SHDSL 2w4w NTU can be used as either of the following:
• Remote unit to the ADTRAN Total Access®3000 multiservice platform (see Figure 1), or
• Pair of units in a point-to-point limited distance campus configuration (see Figure 2), with
one SHDSL 2w4w NTU configured to “LT” mode.
Table 1. SHDSL 2-Wire/4-Wire NTU Products
Part Number Product Name
1230001L1 6540 SHDSL 2-Wire/4-Wire NTU, AC Powered
1230002L1 6540 SHDSL 2-Wire/4-Wire NTU, DC Powered
1230007L1 6541 SHDSL 2-Wire/4-Wire NTU, AC Powered
1230008L1 6541 SHDSL 2-Wire/4-Wire NTU, DC Powered
1230009L1 6542 SHDSL 2-Wire/4-Wire NTU, Span or DC Powered

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
261230001L1-5C
Figure 1. Typical System Application
Figure 2. Typical Campus Application
SHDSL 2-Wire/4-Wire Mode, Line Rate
The SHDSL 2w4w NTU supports multi-rate line operation (refer to Table 2).
SHDSL
REG
2 -4-Wire Twisted Pair(s)
REG Applicable Only for 4-Wire
Management
System
VT100 VT100
Network
SHDSL
2W/4W
NTU
Total Access 3000
or BAU Customer E1
Equipment
(e.g., PABX)
Customer Nx64k
Equipment
(e.g., Router)
SHDSL
LTU
2 -4-Wire
Twisted Pair
VT100 VT100
SHDSL 2W/4W
NTU
SHDSL 2W/4W
NTU
(Configured as an “LT”)
Customer E1
Equipment
(e.g., PABX)
Customer Nx64K
Equipment
(e.g., Router)
Customer E1
Equipment
(e.g., PABX)
Customer Nx64K
Equipment
(e.g., Router)

Introduction
61230001L1-5C 3
Features
Table 3 is a matrix of product features for the five versions of the SHDSL 2w4w NTU.
Table 2. 2-Wire/4-Wire Multi-Rate Operation
Data Rate Type 2-Wire Mode 4-Wire Mode
SHDSL Line
Aggregate Data Rate
200 kbps to 2.312 Mbps (N ×64
kbps + 8 kbps, where N = 3 to 36)
In 2-wire mode, 8 kbps of
bandwidth is required for overhead
framing
400 kbps to 4.624 Mbps (N ×64 kbps +
16 kbps, where 2 x N = 3 to 36)
In 4-wire mode, 16 kbps is required for
overhead framing.
Payload Data Rate 192 kbps to 2.304 Mbps (N ×64
kbps, where N = 3 to 36)
384 kbps to 4.608 Mbps in 4-wire
mode (2 x N ×64 kbps, where N = 3 to
36)
Service Data Rate 64 kbps to 2.304 Mbps (N ×64
kbps, where N = 1 to 36)
64 kbps to 4.608 Mbps (N ×64 kbps,
where N = 1 to 72)
This is the actual user data rate deliv-
ered to either the G.703 or Nx64 kbps
ports.
Table 3. Product Feature Set Matrix
Model Number
1230001E1 1230002E1 1230007E1 1230008E1 1230009E1
Physical Description
Net Housing: 5.3 cm (2.1 in.) H x 23.6 cm (9.3 in.) W x 16.8 cm (6.6 in.) D • • • • •
Front Panel Recessed Pushbuttons (4 total)
PORT SELECT • • • • •
LOCAL LOOP/ERR INJ • • • • •
REMOTE LOOP • • • • •
BERT • • • • •
Front Panel Tri-Color LED Indicators (Always Eight Total)
Left to Right Order Label Function
LED 1 SHDSL SHDSL Port Status, Test Select, Alarms • • • •
LED 2 G.703 G.703 Port Status, Test Select, Alarms • • • •
LED 3 Nx64k Nx64k Port Status, Test Select, Alarms • • • •
SPN PWR Span Power Status •
LED 4 RTS/C Nx64k Port RTS/C Status • • • •
DC PWR Local DC Power Status •
LED 5 RLSD/I Nx64k Port RLSD/I Status • • • •
PRGM Firmware Programming Status •
LED 6 LLOOP Local loopback test status for selected port • • • • •
LED 7 RLOOP Remote loopback test status for selected port • • • • •

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
461230001L1-5C
Compliance
The SHDSL 2w4w NTU complies with the following international standards:
• EN 300 386-2
• IEC 60950/EN 60950/AS NZS60950
•S016
• S043.2
• ITU K.21 Enhanced
• Telstra 1555
Figure 3 shows the compliance code label for the SHDSL 2w4w NTU.
LED 8 BERT BERT for selected port/service • • • • •
Rear Panel
SHDSL Port (RJ-45 135 ohms, TNV-3 rated) • • • • •
G.703 E1 Port (RJ-45 120 ohms, SELV rated) • • •
Optional G.703 E1 Port (RJ-45 to BNC 75 ohms through external adapter, ADTRAN P/N 1225002L1) • • •
G.703 E1 Port (BNC, 75 ohms, SELV rated) • • • • •
Nx64k Port X.21 (DB-15 female / ISO 4903, SELV; V.11 electrical) • • • •
Nx64k Port V.35 (M34 Winchester 34-pin female / ISO 2593. SELV rated; V.35, V.28 electrical • • • •
Nx64k Port V.36 using the V.35 (34-pin male) to V.36 (ISO 4902 37-pin female) 12 inch adapter cable,
ADTRAN P/N 1225004L1; V.11, V.10 electrical
• • • •
Local Management Port (DB-9 female, SELV; V.28 electrical) • • • •
AC Power (IEC-320 power receptacle) • • • • •
DC Power (5.08 mm (0.2 inc.) 4-pin terminal block shrouded male (MOLEX/BEAU 861904 or equivalent) • • •
Power
100-240 VAC, 50/60Hz, 100 mA • • •
35-80 VDC, 250 mA •
120 VDC Span Powered, 150 mA
120 VDC Span Powered, 150 mA; 35-80 VDC, 250 mA Auto-Switched Local Powered •
Table 3. Product Feature Set Matrix
Model Number
1230001E1 1230002E1 1230007E1 1230008E1 1230009E1

Installation
61230001L1-5C 5
Figure 3. Compliance Label
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by ADTRAN could void the user’s authority
to operate this equipment.
INSTALLATION
After unpacking any SHDSL 2w4w NTU, inspect it for damage. If damage has occurred, file a
claim with the carrier, then contact ADTRAN Customer Service. Refer to “Appendix A,
Warranty” for further information. If possible, keep the original shipping container for
returning the unit for repair or for verification of shipping damage.
C A U T I O N
!
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
661230001L1-5C
Shipping Contents
The contents include the following items:
•SHDSL2w4wNTU
• Mating quick-connect terminal screw block (DC models only)
• SHDSL 2w4w NTU Job Aid (product specific)
Front Panel Pushbuttons
There are four pushbuttons on the SHDSL 2w4w NTU front panel (refer to Table 4). The
pushbuttons are recessed to avoid accidental actuation and can be disabled, either individ-
ually or as a group, using the management interface.
Front Panel LEDs
The front panel has LED status indicators that match the specific feature set of the model.
Table 3 on page 3 lists the LED configuration for each product in the series. Table 5 on page 8
details LED functionality.
Figure 4 and Figure 5 illustrate the two possible front panel configurations.
Table 4. Pushbutton Functionality
Pushbutton Description
PORT SELECT Press the PORT SELECT button to select the active port. Selection choices cycle
through the following order: No Port, Nx64k, G.703, SHDSL.
LOCAL LOOP /
ERR INJ
If a port is selected, and a Bit Error Rate Test (BERT) is not in progress, press the
LOCAL LOOP/ERR INJ button to initiate or terminate a local loop on the selected port.
If a BERT is in progress, press the button to inject a single bit error.
REMOTE LOOP If the SHDSL port is selected, press the REMOTE LOOP button to either place or
remove a remote loop on the port by sending a EOC request message to the LTU (or
NTU in campus mode). If the Nx64K port or G.703 port (with only one service
defined) is selected, press this button to place or remove a remote loop on the
selected port's single data service by sending respective inband loop up or loop
down patterns to the far end (in the associated data service timeslots).
BERT If a port is selected and there are no local loops, press the BERT button to start or
stop a BERT on the selected port.

Installation
61230001L1-5C 7
Figure 4. Front Panel for 6540 and 6541 Models
Figure 5. Front Panel for 6542 Model
Express 6500 Series
Express 6500 Series

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
861230001L1-5C
1. Minor SHDSL port alarms: CRC errors, Loop Attenuation Threshold Alarm, SNR Margin Threshold Alarm,
Segment Anomaly, and any ES, SES, UAS, CVC, and LOSWS 15-Minute Threshold Alarm
2. Major SHDSL port alarms: LOS, LOSW, or Segment Defect
3. Minor G.703 port alarms: Rx RAI, Frame Slip, CRC-4 errors, LBER, and any ES, SES, UAS, and CVC 15-Minute
Threshold Alarm
4. Major G.703 port alarms: LOS, LOF, LOMF, Rx AIS, or HBER
5. Nx64K port alarms: Clock Slip, Loss of External Clock, FIFO Underflow/Overflow, and Inactivity Alarm
Table 5. LED Indicator Functionality
Label Status Description
SHDSL {
z
z
z
Off
Green
Yellow
Red
Unit is powered off
Port is trained; no active alarms
Port is trained with a minor active alarm (1)
Port is attempting to or is trained with a major alarm (2)
G.703 {
z
z
z
Off
Green
Yellow
Red
Port is not active
Active Port with no active alarm
Active Port with a minor alarm (3)
Active Port with a major alarm (4)
Nx64K {
z
z
Off
Green
Red
Port is not active
Active Port with no active alarm
Active Port with an active alarm condition (5)
RTS/C {
z
Off
Green
Nx64K port is not active or when active, V.35/V.36 “Request To Send” or
X.21 “Control” line from the DTE is off
V.35/V.36 “Request To Send” or X.21 “Control” line from the DTE is on
RLSD/I {
z
Off
Green
Nx64K port is inactive or when active, V.35/V.36 “Receive Line Signal
Detector” and X.21 “Indication” control line from the NTU is off.
V.35/V.36 “Receive Line Signal Detector” or X.21 “Indication” control line
from the NTU (DCE) is on
LLOOP {
z
z
Off
Yellow
Red
Local Loop is not active
Active Local Loopback on the selected port
Active Local Loop on one or more ports or services (when no port is selected)
RLOOP {
z
z
Off
Yellow
Red
Remote Loop is not active
Active Remote Loopback on the selected port (when determined via estab-
lished EOC)
Active Remote Loop on one or more ports or services (when no port is
selected)
BERT {
z
z
z
Off
Green
Yellow
Red
BERT is not active
Active BERT and the test pattern detector is synchronized with no received
bit errors
Active BERT and one or more test pattern bit errors have been received
Active BERT but the test pattern detector is not synchronized
SPN PWR {
z
Off
Green
Unit is not SHDSL span powered
Unit is SHDSL span powered
DC PWR {
z
Off
Green
Unit is not DC powered
Unit is DC powered
PRGM {
z
z
z
Off
Green
Yellow
Red
Firmware is not being programmed
Local unit firmware is being locally programmed
Remote unit firmware is being locally programmed
Local unit firmware is being remotely programmed

Installation
61230001L1-5C 9
Pushbutton and LED Indicator Interaction
The following is a further explanation of the required interaction between the front panel
pushbuttons and LEDs.
When no port has been selected, (no flashing port LEDs) only the PORT SELECT pushbutton is
enabled, and the LLOOP, RLOOP, and BERT LEDs indicate the status (refer to Table 6).
When the PORT SELECT pushbutton is first pressed, the Nx64K LED flashes (if the model has
an active Nx64K port) to indicate that the Nx64K port has been selected. The LLOOP, RLOOP,
and BERT LEDs indicate the state of tests only on the Nx64K port. Additionally, the LLOOP,
RLOOP, and BERT pushbuttons initiate/terminate tests only on the Nx64K port.
When the PORT SELECT pushbutton is pressed again, the G.703 LED flashes (if the model has
an active G.703 port) to indicate that the G.703 port has been selected. The LLOOP, RLOOP,
and BERT LEDs indicate the state of tests only on the G.703 port.
If there is only a single service on the G.703 port, then the LLOOP, RLOOP, and BERT
pushbuttons initiate/terminate tests only on this G.703 service. If there are multiple G.703
services on the G.703 port, then the LLOOP, RLOOP, and BERT pushbuttons are disabled, and
the LLOOP, RLOOP, and BERT LEDs indicate the status of all services using the G.703 port
(refer to Table 7).
When the PORT SELECT pushbutton is pressed again, the SHDSL LED flashes (if the SHDSL
port pushbutton option is enabled) to indicate that the SHDSL port has been selected. The
LLOOP, RLOOP, and BERT LEDs indicate the state of tests on the SHDSL payload.
Table 6. LED Indication - No Port Selected
Test Description
SHDSL, G.703, or Nx64k interface test condition active LED is on
No interface test condition active LED is off
Table 7. LED Indication - G.703 Port Services
Test Description
One or more G.703 service test conditions active LED is on
No Service test condition active LED is off

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
10 61230001L1-5C
CONNECTIONS
Rear Panel
The NTU does not have a power switch. A rear panel for each model is designed with connec-
tions and labeling (refer to Table 8). Figure 6 through Figure 10 illustrate the SHDSL 2w4w
NTU rear panels.
Figure 6. Rear Panel for Model 6540, AC Powered
Table 8. Rear Panel Connectors
Rear Panel Model P/N
Description Connector(s) Label
1230001E1 1230002E1 1230007E1 1230008E1 1230009E1
SHDSL Port RJ-45 (135 ohm; 2-wire or 4-wire) SHDSL •••••
G.703 Port RJ-45 (120 ohm) G.703 • • •
BNC pair (75 ohm) G.703; TX, RX • •
Nx64K Port M34 Winchester 34-pin Female (V.35) V.35/V.3 6 ••••
Blank (none) •
Management DB-15 Female (X.21) X.21 ••••
DB-9 Female (V.28) Control V.28 •••••
Power IEC-320 (AC) 100-240VAC, 50/60 HZ
100 mA
• •
Terminal Block (DC) 35-80VDC, 250 mA • •
Terminal Block (Span or DC) 35-80VDC, 250 mA •
SHDSL G.703
Nx64K
V.35/V.36
X.21
100-240VAC 50/60Hz 100mA
CONTROL V.28

Connections
61230001L1-5C 11
Figure 7. Rear Panel for Model 6540, DC Powered
Figure 8. Rear Panel for Model 6541, AC Powered
Figure 9. Rear Panel for Model 6541, DC Powered
Figure 10. Rear Panel for Model 6542, Span or DC Powered
SHDSL G.703
X.21
V.35/V.36
CONTROL V.28
Nx64K
35-80VDC 250mA
NC +
SHDSL
X.21
V.35/V.36
CONTROL V.28
100-240VAC 50/60Hz 100mA
Nx64K
TX RX
G.703
SHDSL
X.21
V.35/V.36
CONTROL V.28
Nx64K
35-80VDC 250mA
NC +
TX RX
G.703
SHDSL G.703 CONTROL V.28
3 5-80VDC 250mA
NC +

SHDSL 2-Wire/4-Wire NTU Product Series Installation and Maintenance Practice
12 61230001L1-5C
Power Supply
The various models support one of the following power schemes:
• Local AC powered only
• Local DC powered only
• Span powered with local DC power auto-switchover
No adjustments, strapping, or configuration changes are necessary to power the units.
The NTU power supply includes “dying gasp” circuitry that meets the power status bit require-
ments as specified in ITU-T G.991.2 and for ISDN PRA V3 operation mode.
AC Powering
Physical connection for AC operation will be through an IEC-320 power receptacle. The AC
model operates over an AC input range of 90 VAC to 264 VAC (100 VAC, 110-120 VAC or 220-
240 VAC nominal), 48 Hz to 63 Hz (50 Hz or 60 Hz nominal), and with a power rating not to
exceed seven watts.
DC Powering
Physical connection for DC operation is made on a 4-pin terminal block, shrouded male recep-
tacle. The DC model operates over a DC input range of ±35 VDC to ±80 VDC (–48 VDC
nominal), with a power rating not to exceed seven watts. A detachable mating terminal-screw
block is supplied separately.
Span Powering
The SHDSL 2-Wire/4-Wire NTU span powered models adhere to sections ITU-T G.991.2
Annex B.5.3 as it applies to STU-Rs.
SHDSL Pinout
The SHDSL port uses a TNV-3 rated, 135W impedance, RJ-45 connection with signals and
pinouts (refer to Table 9).
Table 9. SHDSL Port RJ-45 Pinout
Pin
Circuit
Name Function
1Tip 2 4-Wire Loop, 2 Pair Tip
2Ring 2 4-Wire Loop, 2 Pair Ring
3NC Not Connected