4 Description
Functional
The Dgtl LC contains an 8050 microprocessor that provides the following
functions:
-
card self-identification
-
self-test
-
control card operation
-
status report to the controller
-
diagnostics for maintenance purposes
Configuration
Up to 16 Dgd LC circuit packs can be mounted in one PE shelf if the
remaining slots are not used. In addition, up to 16 Dgtl LC packs can be
supported by a single NT8DO6AA Peripheral Equipment Power Supply (PE
Pwr Sup). The PE Pwr Sup is available for both ac and dc power.
._
Power supply to digital telephones
The Dgtl LC needs +15V dc over each loop at a maximum current of 80
mA. The line feed interface can supply power to one loop of varying length
up to 1067 m (3500 ft) using 24 AWG gauge wire with a maximum
allowable ac signal loss of 15.5
dB
at 256 KHz, and a maximum dc loop
--
resistance of 210 ohms.; 26 AWG gauge wire is limited to 745 m (2450 ft).
For a detailed description of the exact power requirements of each set type,
refer
to Meridian modular telephones
(553-2201-l 16)
Digital line card description 553-3001-l 62
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