background image

8

Section 61246026L6-5, Issue 2

61246026L6-5B

1

LOSS is typically several dB less than the insertion loss measured at 200 kHz.  The LOSS measurement is a better indication of the
loop’s attenuation of the 2B1Q signal than the insertion loss measured at a single frequency.  Adtran HDSL can operate on cables with
an excess of 30 dB LOSS.

2

The first number is for the current 15-minute period and the second is the current 24-hour period (Loop 1 and Loop 2 numbers are

displayed).

From the Current System Status screen, type “Z” to
reset the current performance registers to zero on
both the Current System Status and Performance
History screens. A prompt will require user
confirmation to execute the zero register function.

Figures 8 and 8A consolidate current information for
the HDSL, DSX-1, and DS1 interfaces.  A key to the
information provided is found in the center of the
screen.  Arrows indicate the key applies to both the
HTU-C and HTU-R.

LOSS ................. Pulse Attenuation Measurement 

1

SYNC ................ HDSL Loop 1 and Loop 2 Sync

Status

ES 15M/24H ..... Errored Seconds 

2

SES 15M/24H ... Severely Errored Seconds 

2

UAS 15M/24H .. Unavailable Seconds

 2

An indication of Pair Reversal (if present) is given
at the bottom of the first key column.  Status and
configuration information for the DS1 and DSX-1
signals is located in the center of the screen near the
bottom.

FRAME ...... T1 Framing Format selected
CODE ......... T1 Line Code selected
LBO ............ Line Build-Out selected (for DSX-1);

Customer Signal of 0 or -15 dB (for DS1)

NIU ............. Network Interface Unit enabled
BPV ............ Bipolar Violations detected

(DSX-1 and DS1)

ES ............... Errored Seconds (DSX-1 and DS1)
SES ............. Severely Errored Seconds

(DSX-1 and DS1)

UAS ............ Unavailable Seconds (DSX-1 and DS1)
Alarms ........ Lists current alarm condition 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 for
interpreting the indicators are given below.

0 ........ Noise margin is 

 0 dB (

 10

-7

 BER)

1-8 .... Margin measurement above 10

-7 

BER in dB

9 ........ Margin is 

 9 dB (excellent quality) above 10

-7

BER

The HDSL Loopback and Self-Test Option Screens,
illustrated in Figures 10 and 11, may be used to
evoke or terminate loopbacks and self-tests.  These
screens also display the status of current loopback
conditions.

The Provisioning Screen, illustrated in Figure 12,
displays current provisioning settings but does not
provide a means for changing the system
configuration.  Provisioning changes are only allowed
at the CO end of the circuit.

The Troubleshooting Display, illustrated in Figure
13, is a graphic depiction of an HDSL circuit.  The
unit reviews red, yellow, and blue alarm conditions
in the circuit to automatically predict where a fault
is located.  Once a fault location is suspected, the
corresponding portion of the circuit on the screen is
highlighted, and a message describing the failure
will appear.

The Alarm History Screen, illustrated in Figure 14,
provides detailed information on the alarm history
of the HDSL and T1 spans.  Information provided
includes alarm location, type, first and last
time/date, current status, and count.

The Set Time/Date/Circuit ID menu screen,
illustrated in Figure 15, provides additional
provisioning options.  Enter the time parameters as
military time (for example, enter 3:15 p.m. as
“15:15:00”).  Enter the date parameters in mm/dd/yy
format.  Enter the Circuit ID as a 25-character
alphanumeric string.

Note:  If the HTU-R is connected to a HTU-C
that is being controlled by a HFAC unit, the
time, date, and circuit ID should be set via
the  HTU-R  terminal  screen  to  match  the
corresponding data on the network end.

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...

Отзывы: