Q-Flex Satellite Modem Installation and Operating Handbook
12-8
12.9 Advanced ESC and Advanced Aux Option Specifications
Parameter
Modem
ESC/Aux Port
A single port provides the interface for optional high
rate async ESC (IBS/SMS option 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). Other
devices externally wired in parallel with M&C port can
also be accessed remotely.
Async ESC Option
Closed
Net Plus
ESC
Overhead scales to provide any user
specified async ESC baud rate whatever
the satellite data rate. ESC limit is
approximately 70% of main channel rate,
overhead varies from <0.5% to >70%.
IBS option High rate async data using from 1/32
nd
to
22/32
nd
of the IBS overhead, providing
async baud rates from 0.2% to 5.1% of
the terrestrial rate (e.g., up to >2400 baud
at 64kbps). Includes modes compatible
with the P300 and P400 Series, P230 &
P1300/P1361 (using 20/32
nd
of the
overhead).
IBS Aux Data Channel
With IBS option and Advanced Aux option: Intelsat low
rate async ESC definition carried in bit 1 of TS32
providing a synchronous channel at 1/480
th
of the data
rate, allowing up to one quarter of this rate for over-
sampled async data. Compliant with Intelsat IESS-403
low rate ESC definition.
12.10
IDR Option Specifications
Parameter
Modem
IDR ESC Audio
Two 32kbps ADPCM channels
Interface
4-wire 600
Ω
, +7dBm to –16dBm (programmable in
0.1dB steps).
Backward Alarms
Outputs: Four “form c” relays.
Inputs: Four protected inputs, short to 0V to send
alarm with matching summary Rx fail output. Alarm
inputs software configurable for:
a) All external patch,
b) 1=Rx fail and 2-4=external patch,
c) 1=Rx fail and 2-4=OK,
d) 1-4=Rx fail
ESC/Aux Ports
When the IDR option is fitted, independent ESC & Aux
ports on the IDR option replace the single shared
ESC/Aux port on the base unit.