[Asterisk-Users] GSM ISDN gateway to quadbri NT port under bristuffed Asterisk - where to set gain (I have unreliable inband dtmf recognition )?

[Robert Rozman]

Hi,

I'm getting unreliable dtmf recognition (it works fine for 4-5 digits, 
errors (duplicates) on more), when transferred inband from gsm gateway to NT 
port of quadbri under bristuffed Asterisk.....

Since Asterisk is claimed to have good dtmf recognizer, I suspect there are 
some settings to workarouned... I've tried dtmf relax, but didn't help, so I 
suspect gain settings....

Is there any other possible cause of unreliable dtmf inband recognition ? 
Where can I set gain on voice channel (I guess majority of settings under 
bristuff in zaptel.conf are dummy) ?

Any other advice on this problem or similar experience ?

Thanks in advance,

regards,

Rob.