User's Manual

PRACTICE 553-2201-193
l If required, packetizes several SD messages into one DS-30X
message.
(e) Receive /1Processor. The Receive ~Processor receives incoming
signaling messages from digital telephones, via the Set Gate Array
and:
l Converts incoming DS30X signaling messages to SSD message
format.
l Will repacketize a long message into several SSD sized (2-bytes)
messages when required.
(f) Format Converter.
l Converts the Meridian SL-1 voice and data bii-interleaved
format to DS-30X byte-interleaved format.
0 Converts the incoming DS-30X byte-interleaved format to
Meridian SL-1 bit-interleaved format.
(g) Peripheral Gate Array.
l Provides a bi-directional interface for voice and data-between
the Meridian SL-1 Peripheral Bus and the Format Converter.
l Provides serial to parallel conversion of signaling data received
from the Meridian SL-1 Peripheral Bus and transfers the data
to the Transmit PP.
l Provides parallel to serial conversion of signaling data received
from the Receive FP and transfers the data to the Meridian
SL-1 Peripheral Bus.
-
(h) Phase Locked Loop.
0 Ensures phase and frequency stability and correlation between
incoming signals from the digital telephones and signals on the
ISDLC.
0 Three clocks, 2.56 MHz, 4.096 MHz and 5.12 MHz, are derived
from the PLL and synchronized to the 2.048 MHz Meridian
SL-1 clock.
(i) Power Supply.
l An onboard DC-to-DC converter takes either -52 VDC or
-48 VDC input and generates the i-5 VDC required by the
ISDLC logic circuits.
l up to 2 A with 5% regulation
Page l-5
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