Paradise Datacom P300-VSAT Installation & Operating Handbook page 29

Electrical Interface
Aux Data Channel
IBS
[Async ESC Feature]
Closed Net plus ESC
IBS/SMS
[IDR Option]
IDR ESC Audio Interface
Backward Alarms
ESC/Aux Ports
ESC Port
IDR
Others
Aux Port
P300H
RS232, RS422, or RS485 external interfaces or internal link to Remote
M&C port (software selected). No external cabling required between the
ESC and M&C ports for M&C via ESC channel within overhead. Other
devices externally wired in parallel with M&C port can also be accessed
remotely.
INTELSAT low rate async ESC definition carried in bit 1 of TS32
providing a synchronous channel at 1/480th of the data rate, allowing up
to one quarter of this rate for oversampled async data. Compliant with
INTELSAT IESS 403 low rate ESC definition.
Overhead scales to provide any user specified async ESC Baud rate
whatever the satellite data rate. ESC limit is approx 70% of main channel
rate, overhead varies from <0.5% to >70%
High rate async data using from 1/32nd to 22/32nd of the IBS overhead,
providing async baud rates from 0.2% to 5.1% of the terrestrial rate (eg
up to >2400 Baud at 64 kbps). Includes modes compatible with the P400
Series, P230 & P1300/P1361 (using 20/32nd of the overhead).
Two 32 kbps ADPCM channels, 4 wire 600
(software programmable in 0.1 dB steps)
Outputs: Four `form C` relays
Inputs: Four protected inputs, short to 0 V to send alarm, with matching
summary Rx fail output. Alarm inputs software configurable for:
a) all external patch
b) 1=Rx fail & 2-4=External Patch
c) 1=Rx Fail & 2-4=OK
d) 1-4=Rx Fail.
When the IDR option is fitted, independent ESC & Aux ports on the IDR
option replace the single shared ESC/Aux port of the base unit.
RS232, RS422, or RS485 external interfaces or internal link to Remote
M&C port (software selected). No external cabling required between the
ESC and M&C ports for M&C via ESC channel within overhead. Other
devices externally wired in parallel with M&C port can also be accessed
remotely. Provides Clock, Data, & Sync (Octet timing) lines.
Synchronous access to 8 kbps IDR ESC. With the Async ESC feature
(standard on P300-IBS and above) async ESC access to the 8kbps IDR
ESC is provided, giving up to a 9600 Baud async channel
IBS & Closed Net plus ESC facilities as before installation of IDR option,
but now on ESC port on IDR card not shared ESC/Aux port of base unit.
RS232 or RS422 (software selected). Provides Clock and Data lines.
P300 Modem Installation and Operating Handbook
$
, +7 dBm to -16 dBm
Page 29