[Bluez-users] Bridging bluetooth and a cellular modem

[Bluez-users] Bridging bluetooth and a cellular modem

[prem]

I am fairly new to telephony and need some help with understanding the transfer
of voice to and from a bluetooth headset.

I am developing a device which makes use of a GSM/GPRS cellular modem to
transfer data over the Internet using GPRS. But this same modem (Siemens MC35)
will also have to handle voice calls - that is, when a call comes in, the voice
must be captured and transferred over a bluetooth connection to a bluetooth
headset .. and conversely, the voice must be transferred from the bluetooth
headset down to the modem.

I have been trying to figure out how to use the BlueZ SCO APIs to do this - is
this possible at all and if so how is this done?

Also, does BlueZ work on the MIPS processor ? I am using AMD Alchemy Au1500
MIPS32 based processor.

Would appreciate any help on this.

Thank you,
Prem Kurian Philip





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Re: [Bluez-users] Bridging bluetooth and a cellular modem

[Marcel Holtmann]

Hi Prem,

> I am fairly new to telephony and need some help with understanding the transfer
> of voice to and from a bluetooth headset.
> 
> I am developing a device which makes use of a GSM/GPRS cellular modem to
> transfer data over the Internet using GPRS. But this same modem (Siemens MC35)
> will also have to handle voice calls - that is, when a call comes in, the voice
> must be captured and transferred over a bluetooth connection to a bluetooth
> headset .. and conversely, the voice must be transferred from the bluetooth
> headset down to the modem.
> 
> I have been trying to figure out how to use the BlueZ SCO APIs to do this - is
> this possible at all and if so how is this done?

it is possible if your Bluetooth module support SCO over HCI, but then
this is still not very easy to realize. If the MC35 has an external PCM
or so then use this and connect it to the PCM of your Bluetooth module.

> Also, does BlueZ work on the MIPS processor ? I am using AMD Alchemy Au1500
> MIPS32 based processor.

The general answer is yes. However I can't give you a 100% guarantee,
because I don't have access to any kind of this platforms for testing.

Regards

Marcel




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