MT9092
Generate DTMF tones
Description
select B-Channel of operation
Address
15h
DATA
bits 2 or 3 (as required)
reset DSP
1Eh
1Dh
20h
21h
23h
24h
1Eh
00h
set Rx DTMF gain (ie -20 dBm0)
set Tx audio gain (ie 0dB)
set Tx DTMF gain (ie -4dBm0)
write tone coefficient 1
write tone coefficient 2
start DTMF program
22h (or as required)
30h (or as required)
2Eh (or as required)
as required
as required
41h
select transducers and filter/CODEC
(PuFC)
0Eh
as required
and turn off sidetone
optional:
set CODEC Rx gain
0Ah
1Eh
as required (0dB default)
as required
send tones in only Rx or Tx by
disabling
RxMUTE or TxMUTE appropriately
New Call Tone
Description
Address
DATA
Assume that a B-Channel of operation has already been selected for the concurrent handset
conversation.
If this is not true select one.
select B-Channel of operation
reset DSP
15h
1Eh
bits 2 or 3 (as required)
00h
**********************************************************************************
set Rx gain (ie 0 dB with Tx autonull)
set Tx gain (ie 0dB)
1Dh
20h
70h (or as required)
30h (or as required)
Note: these two steps a required for the concurrent conversation only and do not affect new
call tone generation. See Standard Full-duplex handset call for required programming.
**********************************************************************************
write tone coefficient 1
write tone coefficient 2
write warble rate coefficient
start new call tone ringer program
23h
24h
26h
1Eh
as required
as required
as required
71h
set new call tone gain
select speaker
0Bh
0Eh
NCTG2-1 (as required)
02h
9Bh (assuming a concurrent handset
call)
enable new call tone
0Fh
1Eh
01h (assuming all other bits are µ-Law
control ringer cadence by toggling
between gain control and tone ringer
with gain control programs
71h (on)
31h (off)
71h (on) etc...
7-36
MITEL [ MITEL NETWORKS CORPORATION ]
