[Asterisk-Users] Unreliable DTMF detection with DISA on incoming Zap channel on bristuffed * and GSM gateway

[Robert Rozman]

Hi,

I'm getting unusable DTMF detection with DISA on incoming ZAP channel 
(bristuffed *) on quadbri from GSM gateway. DTMF detection works ok in 
normal ISDN incoming line.

How can I check what's going on ? What settings to check ?

Anyone with more experience on such scenarios ?

Thanks in advance,

regards,

Rob.