17
Section 61245002L6-5, Issue 3
61245002L6-5C
Table G. Worksheet PW-1 Replacements
When deploying any of the Low Voltage Litespan
HTU-Cs, the power requirements for the application
should also be considered for product mix
calculations and maximum number of low Voltage
Litespan HTU-Cs within a channel bank assembly.
Use Worksheet PW-1 in the Engineering and
planning section of DSC practice, OSP TL1 software
documentation release 7.1, or higher to determine
whether a particular combination of channel units is
within power-drain specifications. When using
ADTRAN Low Voltage Litespan HTU-C, use the
replacement factors listed in Table K instead of the
ones listed in Worksheet PW-1. The power
parameters shown in Table H are for four
configurations listed in Table G. These values are
derived from an HDSL system with worst-case power
measurements.
7. TROUBLESHOOTING PROCEDURES
Table I is a troubleshooting guide for the Low Voltage
Litespan HTU-C.
8. MAINTENANCE
The ADTRAN Low Voltage Litespan HTU-C requires
no routine maintenance.
ADTRAN does not recommend that repairs be
performed in the field. Repair services may be
obtained by returning the defective unit to the
ADTRAN Customer Service RMA department (see
subsection 11 of this practice).
9. PRODUCT SPECIFICATIONS
Product specifications are listed in Table J.
Configuration
Original Worksheet PW-1 values for AHT1U with no repeater
and a span-powered HTU-R.
Do not use original worksheet values with
ADTRAN products.
ADTRAN Low Voltage Litespan HTU-C and an HTU-R, P/N
1245021L1 or 1245026L1.
ADTRAN Low Voltage Litespan HTU-C with an HRE P/N
1244041 or 1244042, and an HTU-R P/N 1245021L1 or
1245026L1.
A Column Factor
B Column Factor
C Column Factor
0.430
0.076
0.200
0.525
0
0.120
1.525
0
0.225
Table H. Power Parameters for Replacements to Worksheet PW-1
(all worst-case HDSL loop power measurements)
Power Bus
+5V
-5V
-48V switch battery
-48V talk battery
Power consumption
Power Dissipation
ADTRAN Low Voltage Litespan
HTU-C and a Low-Voltage HTU-R,
P/N 1245021 or 1245026L1
525 mA
0 mA
120 mA
0 mA
8.4 watts
3.86 watts
ADTRAN Low Voltage Litespan HTU-C with
an HRE P/N 1244041L2 or 1244042L1, and
an HTU-R P/N 1245021L1 or 12450026L1
525 mA
0 mA
255 mA
0 mA
14.9 watts
4.61 watts
