Ericsson GE FMD LBI-38609A, Руководство оператора

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dialing, press the "*" key on the DTMF keypad to tell the system
to dial the number.
Your FMD radio is capable of simplex (one way)
conversation only. The person you are talking to can hear
you ONLY when you have the PTT switch pressed. You
can hear the person on the telephone ONLY when the PTT
switch is released.
If you leave the PTT switch released for too long, the system
will send three beeps. When you hear these beeps, you
have five seconds to press the PTT switch before the call
is automatically terminated.
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