GVP MCP:mpc:cpa-sit nocircuit

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Published Option

cpa.sit_nocircuit

Default Value: na_sit_nocircuit
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 no circuit pattern. Default tone value is builtin North American SIT no circuit (NA SIT nocircuit). Value "Disable" disables SIT no circuit detection. Valid tones include builtins and Custom tone 1 to Custom tone 10.

The builtin North American sit no 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=1400-1450(Hz), f2=0-0(Hz), ontime=320-440(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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