Voice API Programming Guide — June 2005 185
R2/MF Signaling
Figure 25. Example of R2/MF Signals for 4-digit DDI Application
15.6 R2/MF Voice Library FunctionsThe R2/MF voice library functions are not supported on DM3 boards. For R2/MF signaling on
DM3 boards, see the Global Call documentation set.
The voice software support for R2/MF signaling is based on global tone detection and global tone
generation.
The following R2/MF functions allow you to define R2/MF tones for detecting the forward signals
and to play the backward signals in the correct timing sequence required by the compelled
signaling procedure:
r2_creatfsig()
create R2/MF Forward Signal Tone
r2_playbsig()
play R2/MF Backward Signal
See the Voice API Library Reference for a detailed description of these functions.
CO Forward Signal
Detected
Event
CPE Backward Signal
Response
Digit 3
Digit 9
Digit 6
Digit 0
B-6
A-3
A-1
A-1
A-1
1-3
1-9
1-6
1-0
Send Next Digit
Send Next Digit
Send Next Digit
Address Complete
Changeover to Group B
Subscriber Line Free
Charge on Answer
II-1
Category of Calling Party:
Subscriber w/o Priority-National