2007-02-09 10:45:07

by Mikael Lindqvist

Subject: [Bluez-devel] phone model and link manager version

Hello,

I wonder if there is you think there is any correlation between the
Link Manager Protocol
(LMP) Subversion and the model of a bluetooth phone. I mean, if I find
out the LMP subversion of a remote device with for example hcitool,
like this:

sudo hcitool info <bdaddr>

Requesting information ...
...
LMP Version: 1.2 (0x2) LMP Subversion: 0x41c

Can this subversion be used to identify the model of the phone?

If not, can it be used to suggest that the phone is any of a small set
of models?

If firmware updates are being made on the phone, will that affect the
LMP subversion?

What process inside a phone manufacturer company decide that a
Bluetooth chip with a certain LMP subversion ends up in a specific
model? Is it just related to when the phone happened to be produced or
is it somehow related to the model?

Thanks in advance!

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2007-02-12 19:42:38

by Marcel Holtmann

Subject: Re: [Bluez-devel] phone model and link manager version

Hi Mikael,

> I wonder if there is you think there is any correlation between the
> Link Manager Protocol
> (LMP) Subversion and the model of a bluetooth phone. I mean, if I find
> out the LMP subversion of a remote device with for example hcitool,
> like this:
>
> sudo hcitool info <bdaddr>
>
> Requesting information ...
> ...
> LMP Version: 1.2 (0x2) LMP Subversion: 0x41c
>
> Can this subversion be used to identify the model of the phone?
>
> If not, can it be used to suggest that the phone is any of a small set
> of models?
>
> If firmware updates are being made on the phone, will that affect the
> LMP subversion?
>
> What process inside a phone manufacturer company decide that a
> Bluetooth chip with a certain LMP subversion ends up in a specific
> model? Is it just related to when the phone happened to be produced or
> is it somehow related to the model?

on some phones yes, on others no. The value is Bluetooth chip
manufacturer specific and nowadays doesn't tell you any details about
the phone.

Regards

Marcel



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