Comtech EF Data SDM-300L3 - Manual (Page 25)

SDM-300L3 Satellite Modem Revision 1
Introduction MN/SDM300L3.IOM
1–5
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:
• ASYNC/AUPC* • Asymmetrical loop timing
• Viterbi Decoder • G.703 operation*
• Sequential Decoder • Variable data rates
• 8-PSK • IBS*
• IDR * • D&I
• Reed-Solomon* • OQPSK
• 2xADPCM Voice*
* Optional hardware required.
Table 1-1. FAST Options and Required Configurations
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.
HARDWARE Si
ngl
e Dat
a Rat
e
Low Var
iabl
e Dat
a
ra
te
(up t
o 512 k/
bi
ts
)
Hi
gh
V
ar
ia
bl
e
D
at
a
ra
te
(
up t
o 4.
375
M/bits) Sequent
ia
l Decoder
Vi
te
rb
i Decoder
Asymet
ri
cal
Loop
Timing BUC FSK;
DI
SEQ
OQPSK 8 PSK Reed-
Sol
omon
CODEC (
N
ote 4)
ASYNC/
AUPC
Over
head
Open Net
w
or
k
(I
DR/
IBS)
Dr
op and I
nser
t
Tur
bo CODEC
(N
ot
e 4)
G.
703 I
nt
er
face
2 x ADPCM Voi
ce i
n
64 kbps
Basic Platform SDM-300L3 X
X
(Note 1)
X
(Note
1) X
FAST Option X X X X X X X
FAST Option with Reed-
Solomon hardware
X
FAST Option with Overhead
hardware
X X X
X
(Note
2)
X
(Note
3)
Option withTurbo hardware X