GVP MCP:mpc:cpa-sit vacantcircuit

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Published Option

cpa.sit_vacantcircuit

Default Value: na_sit_vacantcircuit
Valid Values: Any combination of: "na_ringback", "na_busy", "na_fastbusy", "na_sit_nocircuit", "na_sit_vacantcircuit", "na_sit_operatorintercept", "na_sit_reorder", "standard_fax", "tone1", "tone2", "tone3", "tone4", "tone5", "tone6", "tone7", "tone8", "tone9" and "tone10". Or "none".
Changes Take Effect: At start/restart

Specifies tones for CPA's SIT vacant circuit pattern. Default tone value is builtin North American SIT vacant circuit (NA SIT vacantcircuit). Value "Disable" disables SIT vacant circuit detection. Valid tones include builtins and Custom tone 1 to Custom tone 10.

The builtin North American sit vacant circuit has three segments. Each segment is defined as follows:
Segment 1: f1=950-1020(Hz), f2=0-0(Hz), ontime=320-440(ms), offtime=0-60(ms)
Segment 2: f1=1310-1430(Hz), f2=0-0(Hz), ontime=160-300(ms), offtime=0-60(ms)
Segment 3: f1=1740-1850(Hz), f2=0-0(Hz), ontime=320-440(ms), offtime=0-100(ms)

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