Hi David,

 

thanks for the follow up - the SPA-3102 has "DTMF Tx" configuration options under Voice for Line 1 and PSTN Line.

 

These are currently both set to the Default (Auto), the available options are :-

DTMF Tx Method

    Inband

    AVT

    INFO

    Inband+INFO

    AVT+INFO

 

I could change these as you might recommend, but I'm not sure why this would make a difference when the SPA seems to respond OK to phones (at least the one that I've tried) other than my cell phone correctly. Would the DTMF setting not affect everything equally ?

 

regards

Dave