NEC SP5008A - Manual (Page 47)

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3.2.6 Phone Setting
Primary Ringing
Ringing Frequency Specify the Ringing frequency value.
ringing frequency : 15~100 (Unit : Hz)
Ringing ON Specify the Ringing ON value.
ringing ring ON : 0~8000 (Unit : ms)
Ringing OFF Specify the Ringing OFF value.
ringing ring OFF : 0~8000 (Unit : ms)
Ringing level Specify the ringing level.
ringing level : 0 ~ 94 (Unit : V)
Flash low Specify the value of the flash (low).
: 60~2000 (Unit : ms).
If the phone-set’s flash time is smaller than the Flash Low
setting, the flash will be ignored.
Flash high Specify the value of the flash (high).
: 60~2000 (Unit : ms)
If the phone-set’s flash time is larger than the Flash high
setting, the flash will be handled as hang-up.
Secondary Ringing (FXS only)
Note: The feature will be enabled automatically when the Min. Digit Count has been enabled and
specified. It is used to have different ring cadence when the incoming caller number is shorter than
the setting of “Min. Digit Count”