User's Manual

Table Of Contents
184 Voice API Programming Guide — June 2005
R2/MF Signaling
As soon as the CO recognizes the CPE acknowledging signal, it stops sending the forward
signal.
As soon as the CPE recognizes the end of the forward signal, it stops sending the backward
signal.
As soon as the CO recognizes the CPE end of the backward signal, it may start to send the next
forward signal.
The CPE responds to a tone-on with a tone-on and to a tone-off with a tone-off. The CO responds
to a tone-on with a tone-off and to a tone-off with a tone-on. See Figure 24 and Figure 25 for more
information.
Figure 24. R2/MF Compelled Signaling Cycle
A) CO: Turns Forward Signal ON
B) CPE: Detects Forward Signal ON
Turns Backward SIgnal ON
C) CO: Detects Backward Signal ON
Turns Forward Signal OFF
D) CPE: Detects Forward Signal OFF
Turns Backward SIgnal OFF
E) CO: Detects Backward Signal OFF
Begins Next Signal Cycle
Detected Event
Response
Time
CO
Forward
Signal
CO
Backward
Signal
A
B
C
D
OFF
OFF
ON
ON
OFF
OFF
ON
ON
E