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to "Clear-To-Talk" description for more information).
Key Press Tone
This is a short tone that sounds to indicate when a key is
pressed. This tone can be enabled and disabled by pressing
the MUTE key.
NOTE: The following tones are heard only when
making telephone calls .
Reorder Tone (Model TP-4800 only)
Three beeps which indicate that the call has been terminated
by the System.
Return Time Warning Tone (Model TP-4800 only)
Two beeps which indicate that you have not transmitted
recently. If you do not transmit within 5 seconds, the call
will be terminated. The time between transmissions is one
of the parameters used by the System to determine when
a call is finished (if the pound sign (#) key has not been
detected).
Conversation Time-Out Tone (Model TP-4800 only)
Calls are limited to a certain length by the System. Thirty
seconds before this time is reached, a "tick" begins sounding
each second. When the thirty-second period expires, the
call is automatically terminated.