Just an update for the list to close the loop.  Anthony fixed this in https://freeswitch.org/jira/browse/FS-8975.

On Tue, Mar 22, 2016 at 10:35 PM, Oleg Stolyar <olegstolyar@gmail.com> wrote:
Hi guys,

is there some special trick to this?  I set <param name="dtmf-type" value="info"/> in my sip profile but when I call FS from a browser using JsSip on Chrome and execute 
uuid_send_dtmf <uuid> <some digit>, 

FS sends it as 2833 instead of INFO.

Interestingly, if instead I call into the same FS from another FS server and execute the same command, it uses INFO to send DTMF.

I made sure that the Allow headers in INVITES are identical in both cases.

What could be causing it?