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HDSL Quick Start Guide |
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5th Gen HTU-C M, P/N 1245001L2 |
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5th Gen HTU-R, P/N 1245021L1 |
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PRACTICES |
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Please ensure you are properly grounded before setting any function switches. |
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HTU-C |
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Switch Option Settings |
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1 2 4 5 0 0 1 L 2 |
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(arrows indicate default settings) |
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133 |
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266 |
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0 Line Build-Out |
HTU-C M |
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399 |
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DSX-1 |
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EXT |
Rotary Switch |
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LBO |
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The HTU-C M transfers the local configuration to the HTU-R when circuit synchronization is |
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533 |
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B8ZS |
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AMI |
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achieved. The HTU-R then sets its configuration to match the HTU-C M. |
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FRM |
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UFRM |
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ESF |
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SF |
SW1 |
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NIU LB DIS |
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EN |
Rotary Switch |
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LBK TIMEOUT DIS |
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EN |
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LP1 |
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H |
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Used to select operation of the line build-out equalizer in series with the DSX-1 output. |
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D |
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TX |
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LP2 |
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S |
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L E |
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Function |
Description |
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DS1 |
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Q |
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RX |
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ALM |
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EXT |
Selects external line build-out 1 |
LBK |
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0 |
Line length from 0-133 feet of ABAM cable |
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R |
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133 |
Line length from 133-266 feet of ABAM cable |
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S |
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266 |
Line length from 266-399 feet of ABAM cable |
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2 |
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3 |
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2 |
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399 |
Line length from 399-533 feet of ABAM cable |
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533 |
Line length from 533-655 feet of ABAM cable |
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SW1 |
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SW1-1 |
Loopback Timeout |
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Enabled |
With SW1-1 at EN, loopback timeout is enabled (20 minutes). 2, 3 |
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Disabled |
With SW1-1 at DIS, loopback timeout is disabled. |
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SW1-2 |
NIU Loopback |
Programs the ADTRAN HDSL system to respond to traditional T1 |
H T U - R |
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Enabled |
network interface unit (NIU) loop-up and loop-down codes. |
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1245021L2 |
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Disabled |
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LP1 |
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SW1-3 |
Manual Frame Select |
Frame selection |
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LP2 |
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SF |
With SW1-3 at SF, superframe format is selected. |
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ESF |
With SW1-3 at ESF, extended superframe format is selected. |
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DS1 |
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ALM |
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SW1-4 |
T1 Framing |
Selects the T1 framing mode |
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Unframed |
With SW1-4 at UFRM, unframed operation is selected. SW1-3 |
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(GRN) |
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setting is ignored. |
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ESF |
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SF |
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B8ZS |
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AMI |
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Framed |
With SW1-4 at FRM, framed operation is selected. |
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(GRN) |
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SW1-5 |
Manual Code Select |
Selects alternate mark inversion or binary 8 zero substitution codes. |
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LBK |
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R |
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L |
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AMI |
With SW1-5 at AMI, alternate mark inversion is selected. |
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B8ZS |
With SW1-5 at B8ZS, binary 8 zero substitution is selected. |
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O |
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M |
LBK |
C |
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TX |
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RX |
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HTU-R |
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MON |
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Function |
Description |
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REM |
Remote Loopback |
If the HTU-C M is not in loopback, pressing REM activates the |
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loopback towards the customer. If the HTU-C M is in loopback, |
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pressing REM deactivates the loopback. |
LOC |
Local Loopback |
If the HTU-R is not in loopback, pressing REM activates the |
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loopback towards the customer. If the HTU-R is in loopback, |
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pressing REM deactivates the loopback. |
1 If external line build-out is selected, the signal transmitted by the HTU-C M is a 12V p-p signal. This must be considered when measuring the signal at the DSX EQ faceplate Bantam jack. The signal may appear hotter than it should be.
2Loopback timeout must be selected prior to initiating a loopback.
360 and 120 minutes is selectable from the craft interface.
61245.001L2-13A |
Section 61245001L2-13, Issue 1 |
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