OPTION
Address Function Unit Remarks
68050E PSTN wait interval (HIGH)
68050F
PSTN ring-back tone detection
time
20 ms
Detection is disabled if this
contains FF.
680510
PSTN ring-back tone off
detection time
20 ms -
680511
PSTN detection time for silent
period after ring-back tone
detected (LOW)
20 ms -
680512
PSTN detection time for silent
period after ring-back tone
detected (HIGH)
20 ms -
680513
PSTN busy tone frequency
upper limit (high byte)
Hz (BCD)
If both addresses contain
FF (H), tone detection is
disabled.
680514
PSTN busy tone frequency
upper limit (low byte)
680515
PSTN busy tone frequency
lower limit (high byte)
Hz (BCD)
If both addresses contain
FF (H), tone detection is
disabled.
680516
PSTN busy tone frequency
lower limit (low byte)
680517
PABX dial tone frequency upper
limit (high byte)
Hz (BCD)
If both addresses contain
FF (H), tone detection is
disabled.
680518
PABX dial tone frequency upper
limit (low byte)
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