I have experienced this same issue using a Grandstream GXP2200 on the local
FS voicemail.

Seems there should be a dtmf guard time or something to set to filter this.
The problem has happened a couple of times while in voicemail I delete the
current message and FS deletes the current and the next as well. I may have
bounced the button but if I did it was too short of a silence in between for
me to hear.

Jerry Allen

-----Original Message-----
From: freeswitch-users-bounces@lists.freeswitch.org
[mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Jason
Holden
Sent: Friday, October 31, 2014 8:25 AM
To: 'FreeSWITCH Users Help'
Subject: [Freeswitch-users] Duplicate DTMF using certain ip phones on fs 1.2
during outbound calls to IVRS

Any recommendations to resolves this?











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