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Section 61246026L6-5, Issue 2

61246026L6-5B

Part Number

Description

1242002LX .............. 220/E220 HTU-C
1242016LX .............. 3192 HTU-C
1242023LX .............. DDM+ HTU-C
1244001LX .............. Low Voltage E220 HTU-C
1244002LX .............. Litespan HTU-C
1244041LX .............. Low Voltage T400 HRE
1244042LX .............. Low Voltage 819A HRE
1244044L1 ............... Low Voltage 439 HRE
1245001LX .............. Low Voltage E220 HTU-C
1245002L6 ............... Litespan HTU-C
1245003LX .............. Low Voltage DDM+ HTU-C
1245004LX .............. Low Voltage 3192 HTU-C
1245005L1 ............... HLSS HTU-C
1245006L6 ............... T200 HTU-C
1181101L1 ............... Total Access HTU-C
1246001LX .............. E220/220 HTU-C
1246003LX .............. DDM+ HTU-C
1246004LX .............. 3192 HTU-C
1245045LX .............. 239 HRE
1245041LX .............. T200 HRE
1246041LX .............. T200 HRE
1246045LX .............. 239 HRE

The Low Voltage HTU-R can be deployed in
circuits using one HTU-C and one HTU-R.  The
Low Voltage HTU-R can also be deployed with one
HTU-C M and up to two Low Voltage HREs in
circuits requiring reach beyond standard CSA
requirements.  The Low Voltage HTU-R will not
power an external T1 NIU.

The HTU-R terminates local loop HDSL signals
originating from the Central Office (CO) unit and
transforms the HDSL signal into traditional DS1
signals to be delivered to the customer.

The HDSL local loop operates as two independent
subsystems each operating over a single twisted
pair.  The HTU-R communicates over these two
twisted pairs to the HTU-C located at the CO.  Each
subsystem carries half of the total bandwidth along
with a small amount of overhead used for
maintenance and performance monitoring related
functions.  The unit is span powered by the HTU-C.

The effective range of an ADTRAN HDSL-based
T1 circuit can be extended using the ADTRAN
HDSL Range Extenders (HREs).  An HRE can
double the deployment range of standard HDSL and
extend the digital subscriber loop serving range up
to 24 kft with one HRE or 36 kft with two HREs on
24-gauge twisted pair wire.

For more information on HREs, refer to the
appropriate ADTRAN practices.

The Low Voltage HTU-R (P/N 1246026L6) can be
used with any Low Voltage HRE and any HTU-C to
provide a fully span-powered extended range HDSL
circuit.  Span powering meets all requirements of
Class A2 voltages as specified by Bellcore
GR-1089-CORE.

Revision History

This practice has been reissued to update the unit
illustations and remove a note regarding the DS1
transmit level setting.

Electrical Code Compliance

Table A shows the UL/CUL Telecommunications
Codes for the HTU-R.  The HTU-R complies with

the requirements covered under UL 1459 third
edition and is intended to be installed in an
enclosure with an Installation Code (IC) of  “B”
or “E.”

NOTE:  This  product  is  intended  for
installation  in  RESTRICTED  ACCESS
LOCATIONS only.

2.  INSTALLATION

After unpacking the unit, immediately inspect it for
possible shipping damage.  If damage is discovered,
file a claim immediately with the carrier, then
contact ADTRAN customer service (see
subsection 10 of this practice).

Except for DS1 (Tx) output level, the HTU-R is
provisioned by the HTU-C.  The settings on the
HTU-C are encoded and transmitted to the HTU-R
once the circuit has achieved synchronization.  As
with other provisioning options, enabling the NIU
feature of the HTU-R is selected at the HTU-C.

Table A.  UL/CUL Telecommunications Codes

Code

Input

Output

IC

A

--

TC

X

X

PC

C

C

Содержание T200 FNID

Страница 1: ...ches 3 Table D Card Edge Pin Assignments 4 Table E Screen Abbreviations 7 Table F HDSL Loss Values 14 Table G Loop Insertion Loss Data 14 Table H Troubleshooting Guide 15 Table I ADTRAN T200 Low Volta...

Страница 2: ...ctive range of an ADTRAN HDSL based T1 circuit can be extended using the ADTRAN HDSL Range Extenders HREs An HRE can double the deployment range of standard HDSL and extend the digital subscriber loop...

Страница 3: ...l quality on Loop 2 is in one of the following five states Off No synchronization of HTU C and HTU R on Loop 2 Red Poor signal quality on Loop 2 10 7 BER Yellow Marginal signal quality on Loop 2 2 dB...

Страница 4: ...ressing LOC activates the bilateral loopback If the HTU R is in loopback pressing LOC deactivates the bilateral loopback Table C Front Panel Loopback Switches 3 CONNECTIONS All connections of the HTU...

Страница 5: ...ay be accomplished using the control port of the HTU C Refer to the ADTRAN HTU C Installation and Maintenance practice P N 61246001LX 5 or other HTU C practices for more information Figure 3 HTU R MON...

Страница 6: ...provides a faceplate mounted DB9 connector that supplies an RS 232 interface for connection to a controlling terminal The pinout of the DB9 is illustrated in Figure 5 The terminal interface operates a...

Страница 7: ...History screen for HRE 1 illustrated in Figure 9A Type H again for the Performance History of HRE 2 Note Upon entering the terminal screens at the HTU R note the current time as it relates to the 15...

Страница 8: ...tion status A measure of signal quality for each HDSL loop is displayed in graphic form on the bottom of the screen The measure is from 0 poor signal quality to 9 excellent signal quality Guidelines f...

Страница 9: ...orer Boulevard Huntsville Alabama 35806 2807 For Information or Technical Support Support Hours Normal 7am 7pm CST Emergency 7 days x 24 hours Phone 800 726 8663 888 873 HDSL Fax 256 963 6217 Internet...

Страница 10: ...00 X 2 X X 1 X 00000 UAS 00000 X 1 X X 0 X NONE ALARMS NONE X 0 X Press Z to zero registers X to restart MIN MAX M for Main Menu H for HDSL Range Extender 1 HRE View CIRCUIT ID 01 01 99 00 10 18 LOOP...

Страница 11: ...6 30 Press view number to select view 20 15 16 15 Press H to view HRE 1 history PAGE COMMANDS B Page Back F Page Forward Press M to go to Main Menu CIRCUIT ID 01 01 99 00 10 44 24 HOUR REGISTERS PERFO...

Страница 12: ...2 LOOPBACK TO CUSTOMER AT HTU C INACTIVE 3 LOOPBACK TO NETWORK AT HTU R INACTIVE 4 LOOPBACK TO CUSTOMER AT HTU R INACTIVE 5 LOOPBACK TO NETWORK AT HRE 1 UNAVAILABLE 6 LOOPBACK TO CUSTOMER AT HRE 1 UN...

Страница 13: ...CKING XX BLOCKED 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Option not configurable from this terminal The DS1 Output level can be configured using a strap on the circuit...

Страница 14: ...S OK 000 HTU R RED LOS OK 000 DS1 YELLOW OK 000 BLUE AIS OK 000 HDSL Span History SPAN 1 LP1 HLOS OK 000 LP2 HLOS OK 000 HTU C LP1 MRGN OK 000 LP2 MRGN OK 000 HRE 1 LP1 MRGN OK 000 LP2 MRGN OK 000 Pre...

Страница 15: ...ith 26 AWG cable the maximum loop length including bridged tap lengths is 9 kFt 3 For loops with 24 AWG cable the maximum loop length including bridged tap lengths is 12 kFt 4 Any single bridged tap i...

Страница 16: ...se Table H to troubleshoot the ADTRAN HTU R 8 MAINTENANCE The ADTRAN HTU R requires no routine maintenance In case of equipment malfunction use the faceplate Bantam jack connector to help locate the s...

Страница 17: ...HDSL Loop 2 Customer Interface 4 wire DS1 T1 403 compatible ITU T I 431 compliant DS1 Signal Output Level 0 or 15 dB DS1 Input Signal Level 0 to 22 5 dB DS1 Line Coding AMI B8ZS DS1 Framing Format SF...

Страница 18: ...loopback capabilities are controlled from the central office unit HTU C NOTE If the HTU C on a circuit contains Standard loopbacks then refer to subsection 1 of this Appendix to determine its loopbac...

Страница 19: ...code sequences presented the in band codes are shown leftmost bit transmittedfirst andtheESFdatalinkcodes with rightmost bit transmitted first Disarmed State The disarmed state is the normal mode of o...

Страница 20: ...111 0100 0010 The designated HDSL element will loop up after receiving the proper activation sequence Transition from armed to disarmed state All HDSL elements can be commanded to move from the armed...

Страница 21: ...wever the data flow is monitored for the in band deactivation sequence the in band disarming sequence and the ESF data link disarming sequence Also a loop up timeout value causes automatic return to t...

Страница 22: ...ard customer at HTUC N FF04 Loopback data from network toward network at HRE1 N FF06 Loopback data from network toward network at HRE2 C 3F04 Loopback data from customer toward customer at HRE1 C 3F06...

Страница 23: ...d the unit will remain in loopback If the pattern is reinstated the injection of 10 bit errors will resume at 20 second intervals If a second HRE is present the units have been armed the HRE will loop...

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