Testing - ADC HiGain HLU-200 User Manual

the AIS code, or to unblock it by executing the FAR-END ACTIVATE code. Since A5LB never blocks the
arming code from exiting the HLU-200 List 1D, it does not need this FAR-END ACTIVATE code. A3LB
differs from A4LB in that A3LB supports the additional (1-in-6) SmartJack loopback command.
Two additional loopback points are added for each HDU-451 doubler that is used as shown in
Figure 8. NDU1 and NDU2 are executed towards the network. CDU1 and CDU2 are towards the customer.
All four loopbacks can be initiated by the 16 bit inband commands in SPLB states A1LB, A2LB and A3LB as
described in Tables 12 through 14. NDU1 and NDU2, along with the rest of the loopbacks towards the
network, can be issued from the Loopback Menu shown in Figure 24. The simplest HiGain system includes
two loopback locations: The HLU-200 List 1D and the HRU-412. The most complex HiGain system
application includes the HLU-200 List 1D, HRU-412 and two inline HDU-451 Doublers. Refer to the ADC
HiGain Intelligent Repeater Application Note #910, Part #325-910-100, for more SPLB details.
Table 9. HLU-200 List 1D Power Parameters for Doubler Applications
Power Buses HLU-200
1 Dub
or 2 Dub
+5v 590 mA
-5V 66 mA
-48V SW Batt. 351 mA
-48V Talk Batt. 0 mA
Power Consumption 19.8W total
8.2W per slot
Power Dissipation 6.32W total
3.16W per slot
*Not Supported Exceeds 360 mA max 48V current per slot.
†
Must reserve 2 slots for these doubler applications

Testing

Table 19 and Tables 12 through 16 provide step-by-step test procedures for the HLU-200 List 1D as a function
of the loopback option selected. These procedures allow verification of the integrity of the HDSL channels at
every module location as well as the DS1 channels to the customer and the remote/local T1 interface.
If trouble is encountered on the HLU-200 List 1D Litespan-2000 Interface, verify that the HLU-200 List 1D is
making a positive connection with the CBA backplane.
28
HLU-200
† †
CPE I Off 1 Dub CPE I On*
590 mA
66 mA
443 mA
0 mA
24.2W total
12.1W per slot
7.2W total
3.6W per slot
November 22, 1996
150-200-114-03, Issue 03
HLU-200 AT1U
1 Dub HRU
Local Power
590 mA 147 mA
66 mA 0 mA
133 mA 60 mA
0 mA 0 mA
9.33W 3.6 W
4.23W 3.6W
HLU-200 List 1D
REBS
155 mA
191 mA
0 mA
109 mA
7W
6.3W