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Parameter # Description Units
85 Call progress tone frequency 2. The center frequency for the second component of
the call progress tone.
Country Default
United States 480
Australia 0
France 460
Germany 450
Netherlands 415
United Kingdom 450
India 480
Korea 480
China 480
1 Hz (0 Hz
to 1200 Hz)
86 Call progress tone frequency 3. The center frequency for the third component of
the call progress tone.
Country Default
United States 350
Australia 0
France 0
Germany 395
Netherlands 475
United Kingdom 0
India 350
Korea 350
China 350
1 Hz (0 Hz
to 1200 Hz)
87 Call progress tone frequency 4. The center frequency for the fourth component of
the call progress tone.
Country Default
United States 440
Australia 0
France 0
Germany 475
Netherlands 535
United Kingdom 0
India 440
Korea 440
China 440
1 Hz (0 Hz
to 1200 Hz)
88 Disconnect if busy detected. Specifies the duration a busy sequence must be
detected. If a valid busy sequence is detected the call is aborted.
Country
Default
United States 5000
Australia 5000
France 5000
Germany 5000
Netherlands 5000
United Kingdom 10000
India 5000
Korea 5000
China 5000
1 ms
(1000 ms
to 30000 ms)