Making the PC behave like a headset

Hi,

I'm trying to make my PC behave like a bluetooth headset. I already read
through the HSP specification and some code implementing its headset
part.  (namely a bluetooth plugin for Asterisk and the
"ProjectBluezHandfree" [1]).

Here's what I did, in order:
 * Create a RFComm listener socket for the control connection
 * Register at local SDP server (according to the specs: L2CAP, RFCOMM,
  generic audio and headset profile, headset service class)
 * Create a SCO listener socket for the audio connection
  (SOCK_SEQPACKET & BTPROTO_SCO - bind, listen & accept like with other
  sockets)
 * A RFComm handler responds to incoming RINGs.

I also changed my dongle's (CSR chipset) service class to audio and told
my mobile to use the "headset".

The RFcomm part seems to work: The mobile connects to the PC on incoming
calls. The PC responds. The mobile accepts the call.

As far as I understand the specification, the mobile should establish a
SCO link to my PC at that point.  This, however, does not happen.

What do I do wrong?

Thanks in advance,
Phillip Berndt

Ps. I do not subscribe the ML, please cc to my address

[1]
http://wall4.soft.uni-linz.ac.at/_wiki/tiki-index.php?page=ProjectBluezHandsfree

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