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?