Paradise P300 specifications IDR Option

ESC/Aux Port	A single port provides the interface for optional high rate async ESC
	(IBS/SMS or Closed Net plus ESC), or the INTELSAT low rate async IBS
	ESC channel.
Electrical Interface	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.
Aux Data Channel
IBS	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.
[Async ESC Feature]
Closed Net plus ESC	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%
IBS/SMS	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).

[IDR Option]

IDR ESC Audio Interface	Two 32 kbps ADPCM channels, 4 wire 600 , +7dBm to -16dBm
	(software programmable in 0.1dB steps)
Backward Alarms	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.
ESC/Aux Ports	S
	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.
ESC Port	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.
IDR	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

P300H P300 Series Modem Installation and Operating Handbook Page 29