how to set the server device to File Transfer mode

hallo, i'm newbie here. i want to ask you about file
transfer
protocol. i we want to sending file or other operations
using FTP, do
we have to set the server device to File Transfer Mode? or
we must not
to set it? if yes, how we can do it? Is there another
solution?. i
want to create bluetooth application.

----------------------------------------
Thanks in advance.


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      Anyone can explain to me, how its possible to read in
Trasmit Power Level command
by hcitool a valou of -20 dBm, if in power class definition
of bluetooth its defined
that the Minimum Output Power for Class 1 device is 0dBm !?!
Is it my device broken ? 
      

Sds,
   Alexandre


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Alexandre Coser Monteiro wrote:
>       Anyone can explain to me, how its possible to
read in Trasmit Power Level command
> by hcitool a valou of -20 dBm, if in power class
definition of bluetooth its defined
> that the Minimum Output Power for Class 1 device is
0dBm !?! Is it my device broken ? 

0 dBm is the minimum maximum power.

That is a device must be able to reach at least 0 dBm to be
able to call
itself class 1.

What you're reading is the current output power. Devices
are allowed to
power control below 0 dBm if they don't need the extra
power. This
reduces the interference on neighbouring networks.

There is an option in the HCI command to read the maximum
transmit
power that will be used.

The relevant section of the spec is, in the BT 2.0 spec,
volume 2,
part A, section 3, table 3.1 (particularly the footnotes) on
page 31:

         Maximum
         Output           Nominal  Minimum
  Power  Power            Output   Output        Power
  Class  (Pmax)           Power    Power [1]     Control

      1  100 mW (20 dBm)  N/A      1 mW (0 dBm)  Pmin<+4
dBm to Pmax
                                                 Optional:
                                                 Pmin [2] to
Pmax
  [...]

  [1] Minimum output power at maximum power setting.
  [2] The lower power limit Pmin<-30dBm is suggested but
is not
      mandatory, and may be chosen according to application
needs.

Note also, that class 1 devices must limit themselves to
class 2
maximum power (+4 dBm) if the remote side does not support
the
signalling required to control its peer's output power
(same page
of the spec).

	- Steven
-- 


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