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4-1
INMARSAT-C COMMUNICATIONS
This chapter explains how to transmit and receive in the Inmarsat-C
system.
Before conducting any communications, be sure to login with the
NCS in your area.
To transmit E-mail, register with the LES provider. E-mail charges
are calculated separately.
Transmitting
To transmit a message, you first create the message, attach the ad-
dress of the recipient and send it to the LES. The address of the re-
cipient in the Inmarsat-C system is his telex number for land-line or
MES Inmarsat Mobile Number (IMN) for ship.
The message can be one you’ve just prepared or one stored on a floppy
disk. (Messages cannot be transmitted by means of direct keyboard
input.)
Code description
Code can be specified at the IB-581 or PC.
IA5: International alphabet No. 5, ASCII code (7 bit).
Specify this code to transmit English containing lower case
alphabet.
ITA2: No. 2 international communications alphabet (5 bit).
Specify this code for message which contains only No. 2 in-
ternational communications alphabet (see A-11). ITA2 code
is transmitted faster than IA5 code.
Land-based telex equipment uses ITA2. The LES converts all
codes into ITA2. Code which cannot be converted is shown
with a question mark (?).
DATA: Data (8 bit). Use this code to transmit data.