Meridian America 21, 51, 61, 71 - page 865

PRACTICE 553-2201-193
Multiplexes-8 integrated voice and data TCM lines into a 2.56
Mbps DS-30X formatted data stream (used internally in the
pack) when the transmission is from the digital telephone or
associated terminal to the Meridian SL-1.
De-multiplexes the 2.56 Mbps DS30X formatted data stream
into 8 integrated voice and data TCM line-s when the
transmission is from the Meridian SL-1 to the digital telephone
or associated terminal.
Provides a station line transmitter for 8 channels, each of which
transmits BPRZ-AM1 coded data over the TCM loop at 512
kbps.
provides 8 station line receivers, each of which receives
BPRZ-AMI data from a TCM loop independantly at 512 bps.
(c) Set Gate Array. The Set Gate Array handles signalling conversion
for up to 8 integrated voice and data lines.
l Receives signaling bits (8 voice and 8 data) from digital
telephones and transfers the data in bytes via the FIFO to the
Receive PP.
l Accepts DS-30X signaling messages from the Transmit PP and
inserts the packets bit by bit to the appropriate signaling
channel.
(d) Transmit FProcessor. The Transmit PProcessor receives outgoing
Meridian SL-1 SSD messages (i.e., signaling) from the Peripheral
Gate Array and:
l Converts outgoing SSD messages to DS-30X format.
Meridian SL-1
Peripheral Bus
4
TCM
’ Loops TCM
Interface To
DigItal
Telephoto
1
Peripheral
- Gate
Signaling Transmit
Array
e /JProcessor
4
(Ill. 06395)
Fig. l-2
ISDLC Block Diagram
Page l-4
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