telepathy-spec 0.19.6 adds:
* ignoring stream IDs and sending DTMF to all audio streams instead
* the MultipleTones method
* the CurrentlySendingTones property
* the InitialTones requestable property
* the SendingTones signal
* the StoppedTones signal
When telepathy-glib 0.11.6 is available with this spec later today, CMs should implement the new stuff.
wjt informs me that Gabble doesn't do DTMF at all.
Marking as a dup of bug 28413, where someone has provided a patch!
*** This bug has been marked as a duplicate of bug 28413 ***