61246045L1-5B
Section 61246045L1-5, Issue 2
1
Section 61246045L1-5B
Issue 2, April 2000
CLEI Code # T1R6LJPD_ _
239 HRE
High-bit-rate Digital Subscriber Line Range Extender
Installation and Maintenance
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
1. GENERAL
This practice provides installation and maintenance
(I/M) instructions for the ADTRAN 239 T1 HDSL
Range Extender (HRE) (ADTRAN part number
1246045L1).
Figure 1
is an illustration of the HRE.
HRE equipment features include:
• Up to 12 kft of 24-gauge wire range in each
direction
• 2B1Q line coding
• Lightning protection
• In-band loopback control
• Designed for use in standard DDS or ISDN
repeater apparatus case
• Remote provisioning and pass-thru
performance monitoring
The ADTRAN 239 HRE can effectively double the
deployment range of standard HDSL and provide
Carrier Service Area (CSA)-compliant loops on
both sides of the HRE. The unit extends the digital
subscriber loop serving range up to 36 kft over
24-AWG twisted wire.
The HRE is used in conjunction with any span
powering T1 HDSL transceiver unit for the central
office (HTU-C) and any Low Voltage HDSL
transceiver unit for the remote end (HTU-R ).
Compatible ADTRAN HDSL transceiver units are
as follows:
Figure 1. ADTRAN 239 HRE
1246045L1
239 HRE
LP1
LP2
LP1
LP2
LL
(Y)
N
E
T
C
U
S
T
RL
(G)
CONTENTS
1. GENERAL .......................................................... 1
2. INSTALLATION ................................................ 2
3. FACEPLATE FEATURES ................................. 3
4. DEPLOYMENT GUIDELINES ......................... 3
5. MAINTENANCE ................................................ 3
6. SPECIFICATIONS ............................................. 6
7. WARRANTY AND CUSTOMER SERVICE .... 7
Appendix A. HDSL Loopbacks ......................... A-1
FIGURES
Figure 1. ADTRAN 239 HRE ................................ 1
Figure 2. CSA Deployment Guidelines ................. 6
Figure A-1. HDSL Loopback Points .................. A-1
Figure A-2. HDSL Element State Diagram ....... A-2
TABLES
Table 1. Telecommunications Codes ..................... 2
Table 2. Card Edge Pin Assignment ...................... 3
Table 3. 239 HRE Capacity Guidelines ................. 4
Table 4. LED Indicators ......................................... 5
Table 5. LED Operation During Standard/
Enhanced Loopbacks ............................... 6
Table 6. Loop Insertion Loss Data ......................... 6
Table 7. ADTRAN 239 HRE Specifications ......... 7
Table A-1. HDSL Standard Loopback Control
Codes ................................................ A-3
Table A-2. HDSL Loopback Control Codes ...... A-4
Table A-3. Inband Addressable Loopback
Codes ................................................ A-7
