MS48IP Programming Guide
60
Notes
1. DTMF telephone set is required in order to dial extension numbers for making
calls through DISA/ ACD line.
2. If no extension number is dialed within 15-second period during calls through
DISA line, then the caller is transferred to the operator or to the ringing
extension. If that transferred call is not answered within programmable period of
time, then the line is automatically released.
3. A DISA-line caller
-
Can refresh special DISA dial tone by pressing “*” key, so that s/he can
call another extension in case the called extension is busy or does not
answer.
-
Can drop the line by pressing “#” key.
4. If an extension called through DISA line is busy or does not answer, the system
gives another 15 seconds to the caller to call another extension. 9 such attempts
can be done. If no connection has been established after the 9
th
try, the call is
transferred to the operator or to the ringing extension. If, furthermore, that
transferred call is not answered within 5 ringing periods, then the line is
automatically released.
5. The ringing duration of the calls which are automatically transferred to the
operator can be set by programming.
6. If the operator does not activate the ACD, then the ACD lines function as normal
lines.
7. If polarity reversal facility has not been set by CO in a line defined as DISA /
ACD, even if caller hangs up during dialing step, then the call rings at the
operator and the operator receives CO tone when s/he answers the call. (3.11K
or better) However, if CO has set polarity changing property in that line, then, in
that case, when the caller party hangs up, the polarity of the line will change and
the exchange, which detects this, will drop that line. Hence, invalid call requests
to the operator will be blocked.
8. “C” parameter can be activated only for ACD lines. After the defined period by
the parameter “C” the Entry Message is listened to the caller side.
