Telephone Signalling Transceiver / Least Cost Router
CMX860
Rx Modem Mode:
In Rx Modem mode b0 will show the output of the frequency demodulator, updated at 8 times the
nominal data rate.
Rx Tones Detect Mode:
Figure 8b Operation of Status Register for DTMF Rx
b3 b2 b1 b0 Low frequency (Hz) High frequency (Hz)
Keypad symbol
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
941
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
1633
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
D
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
Received DTMF Code: b3-0 of Status Register
ã 2002 Consumer Microcircuits Limited
32
D/860/5
CMLMICRO [ CML MICROCIRCUITS ]
