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RE: [bluetooth-dev] Interoperability..........



In the RFCOMM specification, part F:1 of the Bluetooth core specification 1.0B, section 5.3 table 5.1 System parameter values, the RFCOMM default MTU is defined to 127.

Best Regards

Mats Fridén
AXIS Communication

> -----Original Message-----
> From: Ben Walter [mailto:bwalter@xxxxxxx.com]
> Sent: Wednesday, November 01, 2000 4:20 AM
> To: Mats Fridén; 'Frank Meyering'; Mattias Ĺgren
> Cc: bluetooth-dev@xxxxxxx.com
> Subject: Re: [bluetooth-dev] Interoperability..........
> 
> 
> Hi Mats,
> 
> Which specification are you referring to?  In Section 6.1 of 
> the L2CAP spec
> the default MTU is defined to by 672 bytes.
> 
> Ben
> 
> ----- Original Message -----
> From: "Mats Fridén" <mats.friden@xxxxxxx.com>
> To: "'Frank Meyering'" <meyering@xxxxxxx.de>; "Mattias Ĺgren"
> <mattias.agren@xxxxxxx.com>
> Cc: <bluetooth-dev@xxxxxxx.com>
> Sent: Wednesday, November 01, 2000 12:37 AM
> Subject: RE: [bluetooth-dev] Interoperability..........
> 
> 
> > Hi,
> >
> > The default MTU is set to 127 bytes according to the 
> specification. If you
> want a larger MTU you need to negotiate it, by sending a PN 
> message. If you
> want a larger MTU you have to increase the MTU set in the PN 
> message sent in
> rfcomm_connect_req.
> >
> > Best Regards
> >
> > Mats Fridén
> > AXIS Communications
> >
> > > -----Original Message-----
> > > From: Frank Meyering [mailto:meyering@xxxxxxx.de]
> > > Sent: Tuesday, October 31, 2000 10:47 AM
> > > To: Mattias Ĺgren
> > > Cc: bluetooth-dev@xxxxxxx.com
> > > Subject: AW: [bluetooth-dev] Interoperability..........
> > >
> > >
> > > Hi
> > >
> > > Here is a patch for the original Axis bluetooth_20000814.tgz
> > > to support CSR
> > > Hardware. hci_reset and read_ericsson_rev_info are deleted in
> > > this version
> > > and the values of write_pagescan_activity are "hard coded".
> > > Also I found out, that the maximum RFCOMM MTU is 240 for CSR.
> > > Ericsson Kits
> > > are supporting even more then 240. Why is it set to 127? The
> > > link becomes
> > > faster with 240.
> > >
> > > best regards
> > >
> > > Frank Meyering
> > >
> > >
> > > -----Ursprüngliche Nachricht-----
> > > Von: Mattias Ĺgren [mailto:mattias.agren@xxxxxxx.com]
> > > Gesendet: Freitag, 27. Oktober 2000 12:18
> > > An: 'Frank Meyering'
> > > Betreff: RE: [bluetooth-dev] Interoperability..........
> > >
> > >
> > > Hi,
> > > I'm pleased to hear that you have successfully been able to
> > > use the stack on
> > > CSR hardware. We are about to release a new version of the
> > > stack today (at
> > > the latest on monday) which is a bit more general when
> > > setting the stack to
> > > use different hardware.
> > > Is it possible to get a diff on your code and see how much
> > > that easily could
> > > be included. If the changes easily code be included we might
> > > do this soon.
> > > However, since there has been quite a few changes since 
> last release
> > > (unfortunately our own product development has consumed most
> > > time which made
> > > the release-rate on external code suffer).
> > > The best would probably be for you to work on the new stack
> > > if it is not too
> > > much trouble. Is that ok ? Anyway, a diff on what there is
> > > now would be
> > > useful for us.
> > >
> > > Our system department has promised us a open cvs server any
> > > day now which
> > > hopefully will solve these issues.
> > >
> > > brgds
> > > Mattias
> > >
> > > -----Original Message-----
> > > From: Frank Meyering [mailto:meyering@xxxxxxx.de]
> > > Sent: den 27 oktober 2000 09:40
> > > To: Chervirala Srinivas
> > > Cc: bluetooth-dev@xxxxxxx.com
> > > Subject: AW: [bluetooth-dev] Interoperability..........
> > >
> > >
> > > Hi,
> > >
> > > I have no problems connecting Ericsson Bluetooth Starter Kits
> > > with CSR Kits
> > > (Firmware beta-7). But the connection is a little bit slower
> > > (about 10%).
> > > I'm using version 20000814 with the usermode patch (is able
> > > to run ppp with
> > > the usermode stack, you don't need a kernel module). But I
> > > had to do some
> > > changes in the stack for the csr module. Don't hesitate to
> > > contact me, if
> > > you have further questions or if you want to receive a copy
> > > of my stack.
> > >
> > > best regards
> > >
> > > Frank
> > >
> > > -----Ursprüngliche Nachricht-----
> > > Von: owner-bluetooth-dev@xxxxxxx.com
> > > [mailto:owner-bluetooth-dev@xxxxxxx.com]Im Auftrag von
> > > Chervirala Srinivas
> > > Gesendet: Freitag, 27. Oktober 2000 03:55
> > > An: bluetooth-dev@xxxxxxx.com
> > > Betreff: [bluetooth-dev] Interoperability..........
> > >
> > >
> > > Hi,
> > >
> > > I would like to know whether any body tested interoperability
> > > of AXIS Stack.
> > >
> > > When I tried to establish connection by using SPP with CSR
> > > and Ericsson
> > > modules using AXIS Stack, I am getting 'connection 
> failed' statement.
> > >
> > > Expecting an early reply...
> > >
> > > Thanks
> > > Srinivas Chervirala
> > > -
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