5.10.3.1. DTMF dialing configuration - Station basis 
To set a station to require DTMF signaling, the parameter DTMFCTRD
(AMO SBCSU) must be set to YES or the parameter DHPAR (AMO SCSU) must
be set to DTMFST.
To set a station to block local DTMF signaling while in conference,
the parameter DTMFBLK (AMOs SCSU and SBCSU) must be set to YES.
Both configurations can be done while creating a station, or if the
station is already created it can be done by the AMO action CHANGE. For
example:
- To set the station 3257 as requiring DTMF signaling and do not blocking DTMF signaling
while in
conference, the following AMO command can be used:
CHA-SBCSU:STNO=3257, DTMFCTRD=YES, DTMFBLK=NO;
- To set the analog station 2201 as requiring DTMF signaling and blocking local DTMF
signaling
while in conference, the following AMO command can be used:
CHA-SCSU:STNO=2201, SPEC=SUFDIAL(or SOD), DHPAR=DTMFST, DTMFBLK=YES;