Sharp FO-2600, Руководство по эксплуатации

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How fax transmissions are detected:
Your fax detects fax transmissions in two ways when an answering machine is
connected, depending on whether the document is being sent automatically or
manually:
Automatic dialling:
If the document is sent using a form of automatic dialling, such as Rapid Key or Speed
Dialling, the transmitting fax machine will send a "calling tone" at 3-second intervals
for a period of about 30 to 40 seconds after dialling. When your fax detects this tone, it
will disconnect the answering machine, send a "reception tone" in response, and
begin receiving the transmission.
If the transmitting fax does not receive a reception tone from your fax within 30 to 40
seconds after dialling, it will usually hang up and automatically redial several minutes
later.
Since your fax may not be able to detect the transmitting fax’s calling tone until after
the outgoing message ends, it is important that the answering machine answers the
call within 4 rings and the outgoing message does not last too long. Otherwise, your
fax may not be able to establish communication with the transmitting fax before the
latter hangs up.
Manual dialling:
If the document is being sent by normal (manual) dialling, the transmitting fax machine
does not send a calling tone. Instead, the person faxing normally waits until they hear
a reception tone and then presses their Start key. In the case of an answering
machine connection, they will hear your outgoing message instead of a reception
tone, and then press their Start key.
However, this does not signal a fax transmission to your fax. Instead, it must use a
function called "Quiet Detect Time" to detect the transmission. This function causes
your fax to disconnect the answering machine and begin reception if it detects a
certain duration of silence.
Your fax is set to automatically begin fax reception if it detects a duration of silence of
4 seconds. When the person faxing presses their Start key, the line will go quiet, and
the transmitting fax machine will wait for a reception tone from your fax. Your fax will
therefore disconnect the answering machine 4 seconds after the key is pressed, and
send a reception tone to tell the other fax machine to begin transmission.
If your answering machine has a fast disconnect time and disconnects the line before
4 seconds elapses, fax reception will not be possible. In this case, you must shorten
the Quiet Detect Time setting as described on the following page. On the other hand,
if the Quiet Detect Time setting is too short, your fax may interrupt voice callers if they
pause during their message or if there is a period of silence in your outgoing message.
USING THE CONNECTION
4-4 ANSWERING MACHINE CONNECTION