Hello,
Recently, I've bought a Conceptronic 200M BT dongle, which, as far as
I have learned, is also known as CBT100U V.2 USB. In contrary to its
CBT100U V1.1 predecessor which AFAIK used the CSR chipset, this one
has Broadcom chips.
I'm trying to connect to a Logitech headset (the one mentioned in
another article because of problems with the mic mixer). I don't get any
audio output at the headset. I didn't check if I can get mic audio
from it. What puzzles me is that the output mixer seems to work;
increasing/decreasing the output volume affects a very low noise which
can be heard at high mixer levels.
Telling from btsco's -v output, the Conceptronic connects just as the
other dongle does - I can't see any difference. I'd prefer to use the
Conceptronic because of its small antenna which I hope will give me
the 1..3 meters additional coverage I'm currently missing.
I'm using CVS btsco and the newest bluez software. Any idea what and
where to look for?
Thanks,
Heike
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"Heike C. Zimmerer" <[email protected]> wrote:
> Recently, I've bought a Conceptronic 200M BT dongle, which, as far as
> I have learned, is also known as CBT100U V.2 USB. In contrary to its
> CBT100U V1.1 predecessor which AFAIK used the CSR chipset, this one
> has Broadcom chips.
*grr* I hate it when vendors do this, but
> I'm trying to connect to a Logitech headset (the one mentioned in
> another article because of problems with the mic mixer). I don't get any
> audio output at the headset.
This is probably related to the chipset: If "hciconfig hci0 revision"
doesn't say "SCO mapping: HCI", you are probably out of luck with this
Chipset. See also the "Discussion" section on
http://bluetooth-alsa.sourceforge.net/.
> What puzzles me is that the output mixer seems to work;
> increasing/decreasing the output volume affects a very low noise which
> can be heard at high mixer levels.
This is probably normal, as there is a secondary (rfcomm serial) channel
to the headset that carries commands like Volume, Ringing (check that,
should also work) and button presses.
> Telling from btsco's -v output, the Conceptronic connects just as the
> other dongle does - I can't see any difference.
This is only this control connection, not the SCO voice data connection.
CU, Andy
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