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SDM-300L3 Satellite Modem
Introduction
1.4
FAST Accessible Options
Comtech EF Data FAST system allows immediate implementation of different options
through the user interface keypad. Some FAST options are available through the basic
platform unit, while others require that the unit be equipped with optional hardware or
that the hardware be installed in the field. Refer to Table 1-1 for a listing of possible
configurations.
The options available through the FAST architecture include:
•
•
•
•
•
•
•
* Optional hardware required.
HARDWARE
Basic Platform SDM-300L3
FAST Option
FAST Option with Reed-
Solomon hardware
FAST Option with Overhead
hardware
Option withTurbo hardware
Notes:
1. The basic modem is shipped with either Sequential or Viterbi decoder.
2. Requires G.703 Interface module and Overhead card.
3. Either IBS Option or IDR option includes 2xADPCM voice in 64 kbps IBS.
4. Duplex Reed-Solomon and Turbo can be installed together, however, only one at a time can
be selected.
ASYNC/AUPC*
Viterbi Decoder
Sequential Decoder
8-PSK
IDR *
Reed-Solomon*
2xADPCM Voice*
Table 1-1. FAST Options and Required Configurations
X
X
(Note
X
(Note 1)
1)
X
X
X
X
•
Asymmetrical loop timing
•
G.703 operation*
•
Variable data rates
•
IBS*
•
D&I
•
OQPSK
X
X
X
X
X
1–5
Revision 1
MN/SDM300L3.IOM
X
(Note
X
X
X
2)
X
X
(Note
3)
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