ADTRAN HTU-C M User manual

1Section 61245001L2-13, Issue 161245.001L2-13A
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MERkcabpooLetomeRC-C M is not in loopbackUTHehtfI ssing REM activates theerp,
k towards the customer. If the HTU-C M is in loopback, cabpool
COLkcabpooLlacoLR-UTHehtfI
tonsi MERgnisserp,kcabpoolni setavitca eht
k towards the customer. If the HTU-R
is in loopback,cabpool
pressing REM
deactivates the loopback.
pressing REM
deactivates the loopback.
Please ensure you are properly grounded before setting any function switches.
HDSL Quick Start Guide
5th Gen HTU-C M, P/N 1245001L2
5th Gen HTU-R, P/N 1245021L1
PRACTICES
Switch Option Settings
(arrows indicate default settings)
HTU-C M
The HTU-C M transfers the local configuration to the HTU-R when circuit synchronization is
achieved. The HTU-R then sets its configuration to match the HTU-C M.
Rotary Switch
Used to select operation of the line build-out equalizer in series with the DSX-1 output.
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.
2
Loopback timeout must be selected prior to initiating a loopback.
3
60 and 120 minutes is selectable from the craft interface.
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0
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HTU-R
1245021L2
LP1
LP2
DS1
ALM
SF
AMI
LBK
ESF
B8ZS
MON
L
O
C
R
E
MLBK
TX
RX
(GRN)
(GRN)
(YEL)
(YEL)
HTU-C
1245001L2
TX
RX
LP1
LP2
DS1
ALM
LBK
R
S
2
3
2
B8ZS
FRM
ESF
NIU LB DIS
LBK TIMEOUT DIS
AMI
UFRM
SF
EN
EN
E
Q
DSX-1
LBO
533
399
266 133
0
EXT Line Build-Out
Rotary Switch
SW1
H
D
S
L

2 Section 61245001L2-13, Issue 1 61245.001L2-13A
ADTRAN PRACTICES 5th Gen HTU-C/HTU-R Quick Start guide
HDSL DEPLOYMENT GUIDELINES
TheADTRANHDSLsystemisdesignedtoprovideDS1
based services over loops designed to comply with
CarrierServiceArea(CSA)guidelines. CSAdeployment
guidelines are given below.
1. All loops are non-loaded only.
2. For loops with 26-AWG cable, the maximum
looplengthincludingbridgedtaplengthsis9kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is
12kft.
4. Any single bridged tap is limited to 2kft.
5. Total bridged tap length is limited to 2.5kft.
6. Thetotal lenghtofmulti-gaugecable containing
26-AWG cable must not exceed:
12 -{(3*L26)/9} - LBTAP (in kft)
L26 = Total length of 26-AWG cable excluding
bridged taps (in kft)
LBTAP = Total length of all bridged taps (in kft)
This deployment criteria is summarized in the chart
shown.
Recommendedmaximumlocalloop lossinformationfor
PICcableat70°F,135Ω,resistiveterminationislistedin
the provided table.
An approximation for maximum amount of wideband
nosieonaDSLlocalloopasmeasuredbya50kbpsfilter
is < 31dBrn.
Anapproximationformaximumamountofimpulsenoise
onaDSLlocalloopasmeasuredbya50kbpsfilteris<50dBrn.
These approximations are to be used as
guidelinesonlyandmayvaryslightlyondifferent
loops. Adheringtotheguidelinesshouldproduce
performance in excess of 10
-7
BER.
0
12
11
10
9
8
7
6
5
4
3
2
1
01234
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
56789
2.5
INVALID HDSL CABLE LENGTHS
2.0 1.5 1.0 0.5 0.0
TOTAL
BRIDGED
TAPLENGTH
(KFT)
VALID HDSL CABLE LENGTHS
Loop Insertion Loss
)zH(ycneuqerF)Bd(ssoLmumixaM
0003
000,01
000,05
000,001
000,051
000,002
0.21
0.51
5.52
0.03
57.23
52.53
ADTRAN Technical Support [phone]
Standard support hours, Monday-Friday, 7am-7pm CST
Emergency Support 7 days/week, 24 hours/day
When deployment requires the use of two HREs, the
HTU-CMcanbedeployedwithtwoLowVoltageT400
HREs (1244.041L2) and one Low Voltage HTU-R
(1245.021L1 or 1245.026L1).