164 Voice API Programming Guide — June 2005
Global Tone Detection and Generation, and Cadenced Tone Generation
Figure 21. Standard PBX Call Progress Signals (Part 2)
continuous
10 10
10 10
10
10
CP_RECALL_DIAL
350 + 440 Hz
-17 db
CP_INTERCEPT
a) 440 Hz + b) 620 Hz
-14 db
CP_CALLWAIT1
440 Hz
-23 db
CP_CALLWAIT2
440 Hz
-23 db
CP_BUSY_VERIFY_A
440 Hz
-14 db
CP_BUSY_VERIFY_B
440 Hz
-14 db
CP_EXEC_OVERRIDE
440 Hz
-14 db
CP_FEATURE_CONFIRM
350 + 440 Hz
-17 db
CP_MSG_WAIT_DIAL or
CP_STUTTER_DIAL
350 + 440 Hz
-17 db
25 25 25 25
440
Hz 620
Hz 440
Hz 620
Hz
25 25
440
Hz 620
Hz
25 25
440
Hz 620
Hz
20
20
1000
=
20
20
20
1000
=
20
20
20
175
60
900
=
300
=
10 10 10
10 10
125
=
25
125
=
25