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LINESHARE MASTER-4, LINESHARE RACK
[6] Call Hold Function
This function is an ON/OFF setting.
For best performance from the
system, we recommend leaving this
function ON. When ON, the unit
acts in the following manner:
The device connected to the
Lineshare Master-4 accesses the
phone line and dials a phone
number. Two seconds after the last
tone is dialed, the Time Before First
Tone register (see page 25) activates
its timer. When this timer expires,
the Lineshare Master-4 puts the
device on hold and transmits its
programmed tones. The calling
device will not be able to access the
phone line or produce any dialing
tones during this period.
Between each tone the Lineshare
Master-4 transmits, it listens for a
response signal from the called
device. If the Lineshare Master-4
detects this carrier tone, it stops
transmitting the tones, releases the
device on hold, and takes itself off-
line.
If the Lineshare Master-4 does not
detect the answer carrier from the
called device, it completes its tone
cycle and then releases the line to
the connected device.
If the Call Hold Function is turned
OFF, the device is able to detect the
activity on line. In this mode, the
dialing device can produce tones
after the phone number is dialed.
However, if the device receives a
busy tone and drops the line, the
Lineshare Master-4 will continue
with its tone cycle until complete.
This can cause a timing problem if
the connected device attempts to
redial while the Lineshare Master-4
is transmitting tones.
If the calling device can detect a
busy tone, it is also likely that it will
abort the call and reset for another
call. If so, the Lineshare Master-4
should have the Call Hold Function
turned ON. Then, if a call is placed
to a phone number that is busy, the
Lineshare Master-4 will not allow the
calling device to detect the busy tone
until the end of its time-out period.
This is necessary to maintain the
proper timing sequence between the
Lineshare Master-4 and the calling
device on a redial attempt.
For example, the Lineshare
Master-4 will not detect a modem
disconnecting 15 seconds into the
call because of a busy signal. The
Lineshare Master-4 will maintain the
connection with the telephone line
until its timing programs have
completed. Meanwhile, the modem
would continue attempting to access
the line and could not because the
Lineshare Master-4 is holding it
open, resulting in a non-polled
number.
