From: Marcel Holtmann <marcel@holtmann.org>
To: ubaldo <ubaldo@eja.it>
Cc: BlueZ Mailing List <bluez-devel@lists.sourceforge.net>
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Subject: [Bluez-devel] Re: multi rfcomm/sco connection
Sender: bluez-devel-admin@lists.sourceforge.net
Errors-To: bluez-devel-admin@lists.sourceforge.net
Date: Fri, 16 Jul 2004 17:29:35 +0200

Hi,

> > actually I don't see why you need more than one SCO link in a connection
> > between two devices. However take a look at the kernel source code of
> > Linux 2.6.x and especially at net/bluetooth/hci_conn.c
> 
> I explain you a bit more my situation... 
> 
> I need to be able with a single usb-bt-dongle to play/capture audio for 
> several bt-handsfree, I tried with one and there are no problems, but if I 
> try to connect another one then I get something like "sco channel busy". 
> 
> I studied the net/bluetooth directory but I cannot find any good way to 
> achieve what I need! :) 
> 
> Am I wrong in something or is this feature really missing?

as I said, between two devices BlueZ supports only one ACL link and one
SCO link. These links a bi-directional so you can play and capture audio
data at the same time. The limit to one SCO link is only a per ACL link
limitation. If you open a second ACL to another device you can also have
a second SCO link bound to that connection.

Regards

Marcel


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