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Subject: Re: [Bluez-users] packet types / speed (USB dongles)?
From: Marcel Holtmann <marcel@holtmann.org>
To: Lutz Pressler <Lutz.Pressler@SerNet.DE>
Cc: BlueZ Mailing List <bluez-users@lists.sourceforge.net>
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Date: Thu, 27 May 2004 21:49:30 +0200

Hi Lutz,

> I've got CSR based USB dongles, for which hciconfig -a
> gives "Packet type: DM1 DH1 HV1". Whatever HV1 is,
> for DH1 http://www.holtmann.org/lecture/bluetooth/bt_primer.pdf
> reports payload rates of around 180 kbit/s.
> Now when querying the phone (Nokia 6230) I get as feature
> <HV3 packets>.
> Does this mean, that I could use e.g. DH3 with that phone
> (390 kbit/s symmetric or 586 / 86 asymmetric)?
> Which USB dongles would support that?

every CSR based that I have seen so far supports every packet type from
the Bluetooth 1.1 specification. However you can set the used packet
types by yourself, but this makes no sense. Simply enable them all and
let the link manager decide what's the best to use. The HVx packets for
SCO audio links and don't matter for the data transfers over ACL.

Regards

Marcel




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