"Don Schmidt" <Don
Engineer@PNB.Retired_1987> wrote in
news:Ta6dnUMjj-JVT0XXnZ2dnUVZ_sSdnZ2d@posted.palinacquisition:
> When having a BT unit in use with a cell phone is some sort of setting
> needed before the unit becomes active? In other words can I have the
> speaker/mike clipped on my visor, walk out to the car with my cell in
> my pocket and after starting the car all is working? And when I park
> the car and turn the ignition off, the speaker/mike no longer works
> with the cell phone? Or, do I have to turn BT on and off each time?
>
When you get it, you must "pair" the car to the phone. It's how
Bluetooth knows it's really you, not just anyone off the street. To do
this, for security reasons, you set the car to be "visible" so it
transmits on Bluetooth, then tell the Bluetooth in the phone to go
looking for visible gadgets. Click on the car's name of its bluetooth
device and the phone will pair with the car.
From that point on, every time the phone approaches the car, the phone
will be looking for the car's bluetooth audio device as soon as you turn
it on and automatically connect to it for use...unless you tell the
phone not to, of course. Set automatically to connect to the car, you
do nothing but turn the car's bluetooth device on.....probably with the
ignition key. The phone will beep at you to say it's connected to the
car so you'll know that's what you use to answer/make calls from that
point until you disconnect it, by shutting the car off. You don't have
to turn BT on and off, but if you're not going to use it for long
periods, shutting BT completely off on the phone reduces the loading on
your battery as it is a receiver/transmitter that draws some power, even
just listening for devices so it can autoconnect to them. Of course,
once shut off, it won't hear the car and won't connect until you turn it
back on so it can listen and hear the car calling it....driving you
crazy wondering why the car doesn't connect as you'll forget you shut it
off, of course....(c;]
When BT connects to the car, the speaker/mic in the phone is shut down
so the phone doesn't add to the background noise by its mic picking up
the car noises and bouncing around in the plastic drink holder you
dropped it into. Your callers appreciate this feature...
There are basically two audio "profiles" and the cellphone control
profile that interests you in the car. The audio connecting the
cellphone functions to the speaker and mic in the car to make/take phone
calls is one "profile". It's normally called "handsfree". The car may
have some buttons to control the phone, itself, and that control
"profile" is how the car controls connect to the phone controls. The
third is called A2DP or "Stereo". This audio profile is how the phone's
MP3 player connects to the car radio so you can play the music in the
phone through the nice car stereo they overcharged you for. Most new
car radios are "Bluetooth Ready". This means they have a jack to plug
the SEPARATELY SOLD bluetooth radio into so the car radio can chat with
the phone and get stereo data to play. Unlike FM transmitters which
don't work very well, especially in a crowded FM band of a major city,
the BT stereo link is totally "digital" and noise free, making this a
great way to play the phone's music in the car. This stereo function is
completely separate from the phone connection for calls. Most phones
can connect to a car radio at the same time as a separate handsfree
device because the profiles used are different. Only one device can
connect to any one profile at a time. The range of Bluetooth is only 10
meters so lots more people can use bluetooth in congested areas,
compared to 60 meters for a wifi router, for instance. Your bluetooth
audio will balk if used in a very crowded bluetooth environment....like
inside a big electronics store with 200 bluetooth printers all calling
for users making the band very crowded, indeed.
Hope this helps you. The phone and devices all have easy to follow,
step-by-step instructions to use them. Bluetooth is a standardized
system so this manufacturer's stuff can connect to that manufacturer's
stuff. However, many cellphone carriers shut down all but the basic
audio profile, even if it has an MP3 player, so they can "sell you an
added feature" by just turning back on what you should have had in the
first place....a fraud to be sure.
--
Larry
Bluetooth information request 
Linear Mode
