5.10.3.2. DTMF dialing configuration - Trunk (route) basis 
To set a route to require DTMF signaling, the parameter DTMFCNV (AMO
RICHT) must be set. The DTMFCNV (DTMF conversion) options are:
- FIX activate fixed dtmf conversion;
- SUFDIAL dtmfcnv activated through suffix dialing (AMO WABE:DAR=DTMFCONV);
- WITHOUT dtmfcnv or dtmfdisp not applicable.
The AMO parameters DTMFDISP, DTMFTEXT and DTMFPULS only indicate how the pressed digits
will
be shown, what is the text message shown after the connection and what is the DTMF
signaling
pulse/pause ration for outgoing trunks (routes).