Meridian America 21 Manual De Usuario
PRACTICE
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If
several
messages into one DS-30X
message.
Receive
The Receive
receives incoming
signaling messages from digital telephones, via the Set Gate Array
and:
and:
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Converts incoming
signaling messages to SSD message
format.
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Will repacketize a long message into several SSD sized
messages when required.
messages when required.
Format Converter.
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Converts the Meridian SL-1 voice and data bii-interleaved
format to DS-30X byte-interleaved format.
Converts the incoming DS-30X byte-interleaved format to
Meridian SL-1 bit-interleaved format.
Peripheral Gate Array.
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Provides a bi-directional interface for voice and data-between
the Meridian SL-1 Peripheral Bus and the Format Converter.
the Meridian SL-1 Peripheral Bus and the Format Converter.
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Provides serial to parallel conversion of signaling data received
from the Meridian SL-1 Peripheral Bus and transfers the data
to the Transmit
to the Transmit
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Provides parallel to serial conversion of signaling data received
from the Receive
from the Receive
and transfers the data to the Meridian
SL-1 Peripheral Bus.
Phase Locked Loop.
Ensures phase and frequency stability and correlation between
incoming signals from the digital telephones and signals on the
ISDLC.
ISDLC.
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.
SL-1 clock.
P o w e r S u p p l y .
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An
DC-to-DC converter takes either -52 VDC or
-48
VDC
input and generates the i-5 VDC required by the
ISDLC logic circuits.
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up to 2 A with 5% regulation
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