Table of Contents
Advertisement
CDM-625 Advanced Satellite Modem
Introduction
1.7.6
Framing Summary
Overhead added
Transparent None
To 2 Mbps: 5%
EDMAC
Above 2 Mbps: 1.6%
(see Note 2)
1.6%
EDMAC-2
Fixed 96 kHz
IDR
1/15 of front panel
IBS
data rate
1/15 of front panel
D&I
data rate
Terrestrial is T1 or E1
1/45 of front panel
D&I++
data rate
Terrestrial is
T1 or E1
Variable: between
ESC++
11.76% at 64 kbps to
1.58% above 7 Mbps
0.4% of
QDI
front panel data rate
Notes:
1) Reed-Solomon is Off.
2) 1.5 % for Rates 5/16 or 21/44 BPSK Turbo, Rate 1/2 QPSK/OQPSK Turbo, and all rates > 2 Mbps
Available data
Overhead
rates and format
components
All rates and
None
formats
All rates and
Remote control
formats
link between
modems'
processor plus
AUPC
All rates and
Remote control
formats
link between
modems'
processor plus
AUPC
T1, E1, T2 and E2;
EIA-422 ESC
all formats
(8 kbps)
EIA-422 ESC
(64 kbps or
2 audio links)
4 BW alarms
64 to 2048 kbps
EIA-232 Earth
only; all formats
station
link at 1/480
primary data rate.
One BW alarm
Specific multiples of
EIA-232 Earth
64 kbps only
station
link at 1/480
primary data rate
One BW alarm
Any multiple of 64
Same as EDMAC,
kbps, up to n = 24
plus EIA-232 Earth
station link at
th
1/576
data rate
All rates and
EIA-232 Earth
formats
station
link at variable
rate, plus AUPC
n x 64 kbps,
None
up to n = 128
using a max of 4
balanced G.703 E1
D&I interfaces
1–17
MN-0000036 (Ref MN/CDM625.IOM)
Additional Reed-
Solomon Overhead
200/220
225/205
219/201
126/112
200/180
or 220/200
200/180
or 220/200
T1 = 225/205
E1 = 219/201 and
IESS-310 mode
T2/E2 = 194/178
126/112
219/201 for IESS-310
th
of
mode
126/112
219/201 for IESS-310
th
of
mode
126/112
of primary
126/112
220/200
225/205
219/201
Revision 1
Scrambling
(see Note 1)
Basic ITU
V.35 (Intelsat)
Proprietary
scrambler
Proprietary
scrambler
Basic ITU V.35
(Intelsat)
IESS-309
scrambler
IESS-309
scrambler
Basic ITU V.35
(Intelsat)
Basic ITU V.35
(Intelsat)
Basic ITU V.35
(Intelsat)
Advertisement
Table of Contents
