Systems - Wavecom W74PC Manual

Note: The information in the following paragraphs applies to the land mobile and maritime systems of-
fered by Inmarsat. The aeronautical services differ in channel naming, usage and system setup.

Systems

Over time new generations of satellites were launched into orbit, while new services were added. Current-
ly the third and fourth generation of satellites is in operation (3F, 4F). Inmarsat will also be the operator
of Alphasat planned for launch in 2012 which will provide L band services in Europe, Middle East and Africa
utilizing the expanded L band frequency ranges made available at WARC-03 (World Administrative Radio
Conference). The fifth generation is expected to start deployment in 2013 and will operate Ka band tran-
sponders for the new INMRASAT GlobalXpress VSAT service offering user bandwidths up to 50 Mbps.
Inmarsat started operations in 1982 with leased satellite capacity for the INMARSAT A system. The table
below shows the evolution of the various Inmarsat systems.
System Services Offered
A Analogue voice, G3 fax, telex, data. Discontinued
Aero-H Digital voice, fax , data
B Digital voice, G3 Fax, data, telex. To be discontinued
2015
C Store-and-forward messaging
M Digital voice, G3/4 fax, data
mini-M Digital voice, G3 fax, data. To be discontinued 2012
D Forward paging
D+ Paging with return channel
E
Emergency position indicating radio beacon (EPIRB). Dis-
continued
mini-M Digital voice, G3/4 fax, data
Aero-I Digital voice, fax , data
M4 (GAN) Digital voice, G3/4 fax, data, packet data
R-BGAN Digital voice, G3/4 fax, data, packet data
BGAN Digital voice, G3/4 fax, data, packet data
Aero-C For the aeronautical mobile services , adapted from C
Swift64 For the aeronautical mobile services, adapted from M4
mini-M Aero For the aeronautical mobile services, based on mini-M
F77 For the maritime mobile service, based on M4, approved
for GMDSS, operates in global beams (-4 dB/k antenna),
options: 2.4 kbps G3 fax, 9.6 kbps G3 fax, 9.6 kbps async
data
F55 For the maritime mobile service, same as F77, but not
approved for GMDSS, operates in spot beams (-7 dB/k
antenna), except global 4.8 kbps voice codec, ISDN bear-
er services are optional and has no optional 2.4 kbps G3
fax
F33 For the maritime mobile service, (-12.5 db/k antenna),
global 4.8 kbps voice codec, optional spot beam 9.6 kbps
G3 fax, async data, MPDS
WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V9.1.0
Introduction Max User
Rate (fax, data)
1982 3 kHz, 9.6 kbps,
50 Bd, 56 kbps
1990 10.5 kbps
1994 9.6 kbps
1992 600 bps
1993 2.4 kbps
1996 2.4 kbps
1996 20 bps
1997 20 bps
1997 600 bps
1997 2.4 kbps
1998 10.5 kbps
2000 64 kbps
2003 144 kbps
2006 464 kbps
SAT System  299
Data