ADC PG-Flex FRL-842, Руководство пользователя

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April 22, 2003 SCP-FRL842-013-01H
ADC Telecommunications, Inc. 3
F
UNCTIONS AND
F
EATURES
The FRL-842 provides the following functions and features:
• Line powered from FLL-812/FLL-814
• HDSL line transceivers and power supply
• Front panel status indicators
• Downloadable firmware
• Environmental Alarms
• Support for FFU-865 (Fan Card) and associated alarm
• Mechanized Loop Test (MLT) test system compatibility
– TR-909
– Bypass
MLT components include bypass pair and TR-909 type testing. In TR-909 mode, an internal test head for
determining the condition of the subscriber drop calculates the results and inserts TR-909 resistive signatures for
MLT to read.
S
UBSCRIBER
D
ROP
T
ESTING
The FRL-842 supports subscriber drop testing using an internal test head that eliminates the metallic bypass pair.
This test head reports its results through the Flex PGTC Interface Unit (FPI-829) (for universal systems) or
management unit (for integrated systems) using three-terminal signature resistors that are measured by MLT and
converted to subscriber drop condition messages that can be viewed on the VT-100 terminal as described in
TEST
— Subscriber Drop Test on page 121 .
Subscriber Drop Testing is not available on the FPI-729, FLL-712 or FRL-742.