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15
AXB-DTMF+ DTMF+ Interface
Distinctive Ring Patterns and Send_Commands
Distinctive ringing is a service provided by the local telephone company. Distinctive ring allows
additional phone numbers to be assigned to a single phone line. Then, depending upon the number
dialed, the ringing pattern is different.
The AXB-DTMF+ can identify up to four distinctive ring default patterns. Default time values for
each pattern are shown in FIG. 1. A pattern consists of five parts. Depending on the ring pattern, a
part is either high or low. The distinctive ring patterns shown illustrate the envelope of the incoming
ring with respect to time. The four default patterns are:
! Default Pattern 1: 1 long ring lasting 2 seconds followed by 4 seconds of silence.
! Default Pattern 2: 2 rings, in a 2 second period, followed by 4 seconds of silence.
! Default Pattern 3: 2 short rings and 1 long ring, in a 2 second period, followed by 4
seconds of silence.
! Default Pattern 4: 1 short, 1 long, and 1 short ring, within a 2 second period, followed
by 4 seconds of silence.
FIG. 1 DTMF+ distinctive ring default patterns and time values
Part
Default pattern 1
Default pattern 2
Default pattern 3
Default pattern 4
1
234 5
2000ms
2, 3, 4 and 5
0 ms
4 and 5Part
Part
Part
123
0 ms
1
800ms
400ms
800ms
400ms
200ms
400ms
200ms
800ms
23 451
300ms 300ms
200ms 200ms
2000ms
1000ms
Time values are in milliseconds (1000 ms equals 1 second). All 4 distinctive ring
patterns are within a 2-second period from start to end time, for most applications. If
you plan to change any of the distinctive ring patterns, it is advisable to stay within a 2
second time frame for each distinctive ring pattern.