Hi Georg, On Thu, May 11, 2017 at 1:51 PM, Georg Chini <georg at chini.tk> wrote: > On 11.05.2017 11:55, Tanu Kaskinen wrote: >> >> On Mon, 2017-05-08 at 13:09 +0300, Luiz Augusto von Dentz wrote: >>> >>> Hi Tanu, >>> >>> On Mon, May 8, 2017 at 11:53 AM, Tanu Kaskinen <tanuk at iki.fi> wrote: >>>> >>>> On Mon, 2017-05-08 at 11:26 +0300, Luiz Augusto von Dentz wrote: >>>>> >>>>> Hi Tanu, >>>>> >>>>> On Sat, May 6, 2017 at 7:20 PM, Tanu Kaskinen <tanuk at iki.fi> wrote: >>>>>> >>>>>> On Fri, 2017-05-05 at 16:41 +0300, Luiz Augusto von Dentz wrote: >>>>>>> >>>>>>> Hi Tanu, >>>>>>> >>>>>>> On Thu, May 4, 2017 at 3:29 PM, Tanu Kaskinen <tanuk at iki.fi> wrote: >>>>>>>> >>>>>>>> On Thu, 2017-05-04 at 12:58 +0300, Luiz Augusto von Dentz wrote: >>>>>>>>> >>>>>>>>> From: Luiz Augusto von Dentz <luiz.von.dentz at intel.com> >>>>>>>>> >>> Here there something that perhaps is not clear, both A2DP and HFP are >>> symmetric in terms of audio control, both sides can suspend and resume >>> the stream regardless of their role. > > If you read the HFP 1.7 specification, it says, that the audio connection > may be initiated from both sides. That does however not mean, that a > SCO connection can be set up from both sides. If you take a look at the > diagrams 4.19 to 4.21 in the section 4.11 you can see that the actual > SCO connection is always initiated from the AG side. That is only valid for starting at 1.6 where AT+BCC was introduced, still that is symmetric in a sense that either side case initiates an audio connection it just happens that the command sequence is different. Previous to 1.6 any side could open SCO at will. -- Luiz Augusto von Dentz
