[asterisk-users] DTMF tones mid conversation

[Andrew Thomas]

Hi helpers,

I seem to have a problem of intermittent DTMF tones being played during
a conversation.

Eg: Extn 100 takes an inbound call and all is fine.  Except, at an
undetermined time the person on extn 100 will here a DTMF tone for no
apparent reason (it's not the caller pressing buttons).  The caller
doesn't hear the tone - only the called person.  The call itself
progresses normally.

I am using PRI --> * --> various SIP hard phones.  But I have also heard
it on BRI as well.

Any ideas where to start looking to cure this?

Cheers
Andy