When calling into from an external Phone line (Cell phone,etc) the DTMF works great, every time.
From my office using a ROLM phone dialing out into the Gateway it picks up fine, but the DTMF tones are not recognized but sometimes it is. It is intermittent. I suspect an IOS level related issue. If this is the fix, can you informed me of what IOS level is required to fix the DTMF problem using a PBX.
See attachments for version and running-config.