I run Elastix as my pbx, on a managed xen server. I have been experiencing problems with DTMF tones (for example when you call a helpdesk, and need to enter something). I use Polycom telephones. After some searching I found out that my problem was that I has set the “Asterisk Outbound Dial command options” to wW. This was to enable ondemand recording of calls. I’ve removed it, and I can now happily run through operator menus

Hopefully you won’t have to spend so much time on fixing this. I’d still like to know how to enable ondemand recording though. Also, I’d like to see a comparison between Elastix and a FreeSWITCH based solution such as sipx. My setup is 100% sip.