FELCOM 82
H3-36
3.6 Using two-digit code service (Loopback test)
Some LESs in the Inmarsat networks support automatic line test service for telephone
and telex. The following describes how to use this function.
3.6.1 Telephone test
Using two-digit code telephone service (Code 91), the telephone communication of the
system can be tested.
1. Dial the LES followed by the service code of 91. For example, to call Goonhilly,
press [0][0][2][9][1][Enter].
2. You should obtain the tone signal from the LES for 15 seconds. (Tone signal)
3. Wait for 15 seconds after stopping the tone signal. (Silence)
4. Talk into the handset microphone. Your voice will be heard from the handset
receiver with a delay. The test will automatically terminate after 30 seconds.
(Loop back test)
3.6.2 Telex test
Using two-digit code telex service (Code 91), the telex communication of the system
can be tested.
1. Call the LES with the service code of 91. ([F3][2], enter LES and service code)
The system should receive the following message transmitted from the LES.
01-03-03:10 YMP 003
3413xxxxx ABCD X
GA+
91+
THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG’S 1234567890
THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG’S 1234567890
THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG’S 1234567890
THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG’S 1234567890
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