Hi,
Sorry for "rude" style of post
It will be very helpful if everyone, who will "need something", will provide some description of requested implementation("use case" will be almost enough but after discussion

) of features like a "pause", "force", "understand", or "fuzzy input" like "I need *95 to make something" ("conference", "transfer", "park" or any "suitable nouns"...

)
Too much things are delayed in time without your comments...
Few word about proposed feature:
First, I think this feature is not related to PBX, it is a phoner feature. Why phoners don't support it? Probably, we will try to implement this feature in our new phone

.
Ok,
Lets assume that comma separated number is delivered to PBX.
1. Should PBX use first part as number for routing and then send other parts as DTMFs? (input "999,100,100#" will have a chance to work)
2. If destination is not internal for PBX, should PBX send whole string with comma to device or to use dial+DTMFs style? In other words, Should PBX interpret this number or interpretation should be delegated to next router(PSTN, VoIP provider etc.)? (input like "00357000000,100,100#")
3. How to force initiator of such call to send DTMFs? (RTP stream is internal affair of device and, in most of cases, PBX doesn't handle it)
Any comments?
Thanks