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other party releases the line.)
(Cause and Countermeasure)
As shown in the chart above, the total handshaking time must be reduced. Long distance
connection and linking of several stations means the line connection time cannot be reduced.
Accordingly, the following countermeasures should be attempted. / (A) The TEL/FAX DELAYED
RING count should be 1. (User parameter: code No. 78) / (B) As the 35 sec. count starts directly
after dialing or directly after the START button has been pressed for models with a START
button, the other party should be called manually, if possible. / Another possibility is entering
two pauses at the end of the auto dial number on the transmission side. Then the count start
time will be delayed for 2 pauses (about 10 sec.).
Cause 2:
Erroneous detection due to an echo or echo canceler.
(Echo/Echo Canceler)
The signal from FAX1 reaches FAX2 via the stations 1 and 2, but the reflection signal at station 2
also returns via station 1(echo). As the distance between station 1 and station 2 is far, the echo
returns to FAX 1 a max. of 600 msec after transmission. There is a possibility that this signal is
detected erroneously as the signal from FAX2. For a normal call, there is a possibility that the
echo of their own voice will make the call difficult to understand. For this reason, each station
(station 1, station 2) attaches echo cancellers (S1, S2) for international lines or long distance
lines. For the echo canceller, the level of the transmission signal from FAX 1 is compared with
the level of the reception signal from FAX2. When the S1 is closed and S2 is open, so that the
echo does not return to FAX1.
(Causes and Countermeasures)
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