Q-Flex Satellite Modem Installation and Operating Handbook
12-9
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 and sync (octet timing) lines.
IDR
Synchronous access to 8kbps IDR ESC.
With the Async ESC option, async ESC
access to the 8kbps IDR ESC is provided
giving up to a 9600 baud async channel
Others
IBS and 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.
Aux Port
RS232 or RS422 (user selectable). Provides clock and
data lines
IDR
Provides 32 or 64kbps access in place of
one or both audio ESC channels.
IBS
Intelsat low rate ESC mode as previously
but now via Aux port on IDR card not
shared ESC/Aux port of base unit. IDR
option also adds sync IBS mode,
configurable to use between 1/32
nd
and
21/32
nd
of the IBS overhead providing a
full sync Aux port at between 0.2% and
4.3% of the main data rate.
Aux port provides satellite timing
information for P1500 slave Frequency
Standard when not configured for Aux
data access.
12.11
BERT Option Specifications
Parameter
Modem
BER Channel
The BERT may operate through main traffic, ESC data
or Aux data channels. Use of ESC & Aux data
channels allows continuous real traffic BER
performance monitoring while the modem carries
traffic.
Test Patterns
2
11
-1, 2
15
-1, 2
20
-1 and others, compatible with common
standalone BER testers.
Results
Display of error count and average BER
Autolog
Automatic logging of average BER and other
parameters at regular intervals.
