x
BS ............................................................................................................................ Backspace
Bulletin Board (in a TDM channel):
A data packet transmitted in each frame of a TDM channel, which contains information
about the status of the Inmarsat B/M, mini-M and C network configurations, and the
current frame number, used by the MES as a timing reference.
BUZ ............................................................................................................................... Buzzer
Byte:
One byte comprises eight bits and may represent either one alphanumeric character or
numeric information.
C
Channel number:
The number representing the frequency of an Inmarsat communications channel.
Character:
One element of an alphanumeric character set. One character is equivalent to one byte or
eight bits.
Class 1 Inmarsat C MES:
A Class 1 MES is capable of ship-to-shore and shore-to-ship message transfer and
distress alerting, but is not capable of receiving EGC messages.
Class 2 Inmarsat C MES:
A Class 2 MES is capable of two modes of operation (selected by the operator):
• As Class 1, and also capable of receiving EGC messages when not engaged in
Inmarsat C traffic.
• Ready for EGC message reception exclusively (and not available in that mode for
Inmarsat C message transfer).
Class 3 Inmarsat C MES:
A Class 3 MES has two independent receivers, one for receiving two-way Inmarsat C
messages, the other for receiving EGC messages.
Closed network:
A private network, with access limited to registered users. The Inmarsat C system allows
two types of closed networks: data reporting networks, identified by a Data Reporting
Network Identification (DNID) code, and EGC Fleet NET networks, identified by an
EGC Network Identification (ENID) code.
Closed user Group:
A private network available only to a group of registered users. Access from the public
network being barred to non-registered users.
CNID ......................................................................................Closed Network Identification
COMM...........................................................................................................Communication
Command:
The generic name for anything you tell a computer program to do.
Commissioning:
The process by which an MES is registered for use via the Inmarsat network.
CPU ...................................................................................................Central Processing Unit
CR..................................................................................................................Carriage Return
One of a code for line feeding.
CSDN ...................................................................................Circuit Switched Data Network
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