[AsteriskBrasil] Asterisk com chan_mobile

[Alexandre Cavalcante Alencar]

Olá,

Fiz testes com a versão trunk (asterisk, zaptel, libpri, libss7,
asterisk-addons) com celulares Sony Erricsion e funcionou bem originar
chamadas pelos celules (via chan_mobile). Já capturar uma chamada
realizada para o celular não funcionou... via no console a chegada da
ligação, mas o áudio não fechava e o celular continuava tocando...

Com relação às 'antenas', basicamente, é importante observar a que
classe ela pertence (isso também é válido para o dispositivo celular
ou headset). Veja o texto abaixo, ele foi tirado de [1].

Ats,

--------------------------------------------------------------------------------

Bluetooth Basics

Bluetooth wireless technology is a short-range communications
technology intended to replace the cables connecting portable and/or
fixed devices while maintaining high levels of security. The key
features of Bluetooth technology are robustness, low power, and low
cost. The Bluetooth specification defines a uniform structure for a
wide range of devices to connect and communicate with each other.

Bluetooth technology has achieved global acceptance such that any
Bluetooth enabled device, almost everywhere in the world, can connect
to other Bluetooth enabled devices in proximity. Bluetooth enabled
electronic devices connect and communicate wirelessly through
short-range, ad hoc networks known as piconets. Each device can
simultaneously communicate with up to seven other devices within a
single piconet. Each device can also belong to several piconets
simultaneously. Piconets are established dynamically and automatically
as Bluetooth enabled devices enter and leave radio proximity.

A fundamental Bluetooth wireless technology strength is the ability to
simultaneously handle both data and voice transmissions. This enables
users to enjoy variety of innovative solutions such as a hands-free
headset for voice calls, printing and fax capabilities, and
synchronizing PDA, laptop, and mobile phone applications to name a
few.
	

Core Specification Versions

    * Version 2.0 + Enhanced Data Rate (EDR), adopted November, 2004
    * Version 1.2, adopted November, 2003

Specification Make-Up
Unlike many other wireless standards, the Bluetooth wireless
specification gives product developers both link layer and application
layer definitions, which supports data and voice applications.

Spectrum
Bluetooth technology operates in the unlicensed industrial, scientific
and medical (ISM) band at 2.4 to 2.485 GHz, using a spread spectrum,
frequency hopping, full-duplex signal at a nominal rate of 1600
hops/sec. The 2.4 GHz ISM band is available and unlicensed in most
countries.

Interference
Bluetooth technology's adaptive frequency hopping (AFH) capability was
designed to reduce interference between wireless technologies sharing
the 2.4 GHz spectrum. AFH works within the spectrum to take advantage
of the available frequency. This is done by detecting other devices in
the spectrum and avoiding the frequencies they are using. This
adaptive hopping allows for more efficient transmission within the
spectrum, providing users with greater performance even if using other
technologies along with Bluetooth technology. The signal hops among 79
frequencies at 1 MHz intervals to give a high degree of interference
immunity.

Range
The operating range depends on the device class:

    * Class 3 radios – have a range of up to 1 meter or 3 feet
    * Class 2 radios – most commonly found in mobile devices – have a
range of 10 meters or 30 feet
    * Class 1 radios – used primarily in industrial use cases – have a
range of 100 meters or 300 feet

Power
The most commonly used radio is Class 2 and uses 2.5 mW of power.
Bluetooth technology is designed to have very low power consumption.
This is reinforced in the specification by allowing radios to be
powered down when inactive.

Data Rate
1 Mbps for Version 1.2; Up to 3 Mbps supported for Version 2.0 + EDR

--------------------------------------------------------------------------------

[1] http://www.bluetooth.com/Bluetooth/Learn/


On 6/28/07, Diego Zuaneti Arruda <diego em fasternet.com.br> wrote:
>
>
>   Pessoal, consegui fazer funcionar o Asterisk com o chan_module que se
> encontra na versão trunk do asterisk-addons.
>
>   A versão do Asterisk que estou utilizando é o 1.4.5, e estou testando com
> o aparelho Motorola V3.
>
>   Funcionou tudo certinho, porém quando tento utilizar chamada simultanea
> (com 2 aparelhos), a ligação cai.
>
>   Tentei outro modelo de adaptador bluetooth, e conseguir realizar as 2
> chamadas simultaneas, porém as 2 chamadas começam a ficar robotizada e com
> delay e não da pra entender mais nada (parece que é falta de banda).
>
>   Gostaria de saber de vocês se alguém utiliza com chamadas simultaneas, e
> qual adaptador bluetooth está usando, pois estou achando que pode ser o
> adaptador bluetooth que não está suportando.
>
>
>
>
> Obrigado,
> Diego Zuaneti Arruda
>
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>
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> http://www.asteriskbrasil.org
>


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