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61246026L6-5B

Section 61246026L6-5, Issue 2

5

DS1 MON Bantam Jacks

The jack labeled “MON” provides a non-intrusive
access point for monitoring the transmit and receive
signals at the DS1 interface point.

In general, the monitoring jacks provide a
non-intrusive tap onto a signal line that permits the
connection of test equipment to monitor the
characteristics of that signal.  For example, the DS1
MON jack on the HTU-R could be used to connect
to a bit error rate tester to monitor for
synchronization, test patterns, etc.  Figure 3 is an
illustration of specific jack detail.

Note: For the MON jacks, the Tx and Rx
indications  relate  to  the  direction  of  the
signal to/from the HTU-R, respectively.

HTU-R Network Loopbacks

The HTU-R responds to multiple loopback
activation processes.  The loopback position is a
logic loopback located within the HTU-R internal
HDSL transceiver.  See Figure 4.

First, manual loopback activation may 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 Diagram

Tx

Rx

CUST

MON

HTU-R

T
R

T1
R1

Second, the HTU-R will respond to the industry
defacto HDSL loopback codes as designated in the
ANSI document T1E1.4/92.  A synopsis of the
method described by ANSI is presented in
Appendix A.

Third, the HTU-C will respond to manual loopback
activation by pressing the LOC LBK button on the
faceplate.  This will activate a bilateral loopback at
the HTU-R.

Figure 4.  HDSL Loopbacks

DSX-1

HTU-C

LOCAL

LOOP

HTU-R Network-Side Loopback and/or
HTU-R NIU Loopback

HTU-R

X

DS1

AIS

HTU-C

LOCAL

LOOP

HTU-C Customer-Side Loopback

HTU-R

X

DS1

HTU-C

LOCAL

LOOP

HTU-R Customer-Side Loopback

HTU-R

X

DS1

AIS

DSX-1

LOCAL

LOOP

HTU-C Network-Side Loopback

HTU-R

HTU-C

DS1

X

AIS

HTU-C

HRE Network-Side Loopback

DS1

DSX-1

HRE

AIS

HTU-R

HTU-C

LOCAL

LOOP

HTU-R Bilateral Loopback

HTU-R

DS1

X

X

HTU-C

HRE#2  Network-Side Loopback

DSX-1

HRE #1

HRE #2

DS1

HTU-R

AIS

X

X

X = Signal Inactive
D = Data Sent

AIS

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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