ADTRAN DDM Plus HTU-C Installation And Maintenance Manual

Contents
1. GENERAL ......................................................................... 1
2. INSTALLATION ............................................................... 4
3. CONNECTIONS ................................................................ 6
4. HDSL SYSTEM TESTING ............................................... 7
5. CONTROL PORT OPERATION ...................................... 8
6. HDSL DEPLOYMENT GUIDELINES .......................... 17
7. TROUBLESHOOTING PROCEDURES ....................... 18
8. MAINTENANCE ............................................................ 18
9. PRODUCT SPECIFICATIONS ...................................... 18
10. WARRANTY AND CUSTOMER SERVICE ................ 18
Appendix A. HDSL Loopbacks ........................................... A-1
Figures
Figure 1. ADTRAN DDM Plus HTU-C ............................. 1
Figure 2. DDM Plus HTU-C Option Switch Locations ..... 3
Figure 3. HTU-C Edge Connector Wiring ......................... 6
Figure 4. HTU-C Span Powering Diagram ........................ 6
Figure 5. HDSL Loopbacks ................................................ 7
Figure 6. RS-232 (DB9) Pin Assignments ......................... 8
Figure 7. Introductory Menu Screen ................................. 11
Figure 8. HDSL Main Menu Screen ................................. 11
Figure 9. Current System Status Screen ........................... 12
Figure 9A. Current System Status Screen -- HRE .............. 12
Figure 10. Performance History Screen .............................. 13
Figure 10A. Performance History Screen -- HRE ................. 13
Figure 11. Loopback Options Screen ................................. 14
Figure 12. Self-Test Options Screen ................................... 14
Figure 13. Provisioning Screen ........................................... 15
Figure 14. Troubleshooting Display ................................... 15
Figure 15. Set Time/Date/Circuit ID .................................. 16
Figure 16. HDSL Deployment Guidelines ......................... 17
Tables
Table 1. UL/CUL Telecommunications Codes .................... 3
Table 2. SW1 Rotary Switch Option Settings ...................... 4
Table 3. SW2 Option Settings .............................................. 4
Table 4. SW4 Option Settings .............................................. 4
Table 5. Power Consumption Worksheet ............................. 5
Table 6. Front Panel Indicator .............................................. 5
Table 7. Screen Abbreviations Defined ................................ 8
Table 8. HDSL Loss Values ............................................... 17
Table 9. Loop Insertion Loss Data ..................................... 17
Table 10. Troubleshooting Guide ......................................... 18
Table 11. HDSL DDM Plus HTU-C Unit Specifications ... 19
Table A-1. HDSL Loopback Control Codes ........................ A-2
Table A-2. Inband Addressable Loopback Codes ................ A-3
61245003L6-5E Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respoective holders.
DDM Plus HTU-C
High-bit-rate Digital Subscriber Line
Transceiver Unit for the Central Office
Installation and Maintenance
Section 61245003L6-5, Issue 5

Figure 1. ADTRAN DDM Plus HTU-C

1. GENERAL

The ADTRAN DDM Plus HDSL Transceiver Unit
for the Central Office (HTU-C) (ADTRAN P/N
1245003L6) is the Central Office (CO) unit used to
deploy a repeaterless T1 circuit using 4-wire
metallic facilities. The unit occupies one slot in an
AT&T DDM Plus DS1 Extension shelf. The unit is
illustrated in Figure 1.
DSX-1 signals are provided to and from the network
while 2B1Q HDSL signals are provided to the local
loop. The ADTRAN HTU-C works in conjunction
with the ADTRAN HDSL Transceiver Unit for the
Remote end (HTU-R) and HDSL Range Extender
(HRE) to provide a DS1 service up to 36,000 feet on
the local loop.
This HTU-C works with multiple list versions of the
HTU-R and HRE as listed below:
• 1244021L1, Low Voltage HTU-R T400 CP
• 1244022L1, Low Voltage HTU-R SA
• 1244041LX, Low Voltage T400 HRE
• 1244042L1, Low Voltage 819A HRE
• 1244044L1, Low Voltage 439 HRE
• 1245021L1, Low Voltage HTU-R T200 CP
• 1245022L1, Low Voltage HTU-R SA
• 1245026L1, Low Voltage HTU-R CI
• 1245026L4, Low Voltage HTU-R
• 1245026L5, Low Voltage HTU-R w/PRM
Section 61245003L6-5E
Issue 5, April 2001
CLEI Code #T1L4S4TC_ _
1