MES interface

The MES consists of the Data Circuit

 

Terminating Equipment (DCE) and the

 

Data Terminal Equipment (DTE). The

 

DCE consists of the antenna unit and

 

the communication unit. And the DTE

 

consists of the terminal unit (or a PC),

 

keyboard and printer.

Terrestrial network

The major functions of the LESs are:

interface

 

 

 

1) Telex store-and-forward conversion

 

2)

Handling EGC messages

 

3)

Handling distress alerts

 

4)

Data Reporting and Polling

Types of MES

There are three types of MES: class 1, class 2 and class 3. The FELCOM 12 is a class 2 MES.

Class 1

1) Transmits messages to LES

 

2) Receives messages from LES

Class 2

1) The functions of class 1 plus opera-

 

tion as an EGC receiver when not

 

transmitting or receiving.

 

2) EGC-only receiver

Class 3

The function of class 1 plus simulta-

 

neous operation as a EGC-only receiver.

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Furuno FELCOM 12 manual Types of MES
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