Re: GPRS while ringing?

2007-05-07 Thread kenneth marken

Nils Faerber wrote:

Joel Newkirk schrieb:

Is it possible and feasible to establish a brief (3-5 seconds?) GPRS
connection when ringing an incoming call?

I've been thinking about callerid name lookups.


I guess not.
First of all GPRS connection setup can take longer than this - basically
the GPRS data connection is done using PPP.
Second, though not being a GSM expert, I think that voice call is not
possible during GPRS sessions. This would for me also mean that during
call signalling GPRS cannot be established - either the GPRS or teh
voice call will fail then.



on my SE Z710 the blue and green globe that indicates GPRS connection 
goes gray on a call or similar. as in, it maintains the connection 
internally, but no data can be be exchanged oveer it.


the data while talking is supposedly one of the benefits of the UMTS 
system as its needed to do video calls. funny thing is that if they 
instead went for transporting both the call and the video as a single 
data stream (IP anyone?) the problem would be gone, even without having 
a whole new phone system in place.


but then i guess it would be harder for the network operators to bill 
you for your use...


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Re: GPRS while ringing?

2007-05-07 Thread Andreas Kostyrka
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It's not as bad. It's not "modern" phones that can do, it's a
disappearing small number of phones, most new phones are class B.

Real class A phones are expensive, as they need two seperate radios :(

Andreas

Mikko Rauhala wrote:
> ma, 2007-05-07 kello 11:53 +0400, Nikita Melnikov kirjoitti:
>> Not really, as far as i _heard_. I got told that u can accept incoming
>> calls not dropping gprs connection on modern phones. Didn't test it
>> myself, tho, because i own some really oldschool Ericsson phone ;) 
> 
> That's spesified as GPRS class A, and I suppose some phones have it. Neo
> uses a class B GSM/GPRS chip (according to Sean's vague recollection at
> a seminar ;), which will have to suspend GPRS for voice/SMS, though.
> 
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Re: GPRS while ringing?

2007-05-07 Thread Nikita Melnikov
On Mon, May 07, 2007 at 12:26:58PM +0300, Mikko Rauhala wrote:

> ma, 2007-05-07 kello 11:53 +0400, Nikita Melnikov kirjoitti:
> > Not really, as far as i _heard_. I got told that u can accept incoming
> > calls not dropping gprs connection on modern phones. Didn't test it
> > myself, tho, because i own some really oldschool Ericsson phone ;) 
> 
> That's spesified as GPRS class A, and I suppose some phones have it. Neo
> uses a class B GSM/GPRS chip (according to Sean's vague recollection at
> a seminar ;), which will have to suspend GPRS for voice/SMS, though.

Ah, thanks for clearing the situation :)

> 
> -- 
> Mikko Rauhala   - [EMAIL PROTECTED] - http://www.iki.fi/mjr/>
> Transhumanist   - WTA member - http://www.transhumanism.org/>
> Singularitarian - SIAI supporter - http://www.singinst.org/>
> 
> 
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Re: GPRS while ringing?

2007-05-07 Thread Mikko Rauhala
ma, 2007-05-07 kello 11:53 +0400, Nikita Melnikov kirjoitti:
> Not really, as far as i _heard_. I got told that u can accept incoming
> calls not dropping gprs connection on modern phones. Didn't test it
> myself, tho, because i own some really oldschool Ericsson phone ;) 

That's spesified as GPRS class A, and I suppose some phones have it. Neo
uses a class B GSM/GPRS chip (according to Sean's vague recollection at
a seminar ;), which will have to suspend GPRS for voice/SMS, though.

-- 
Mikko Rauhala   - [EMAIL PROTECTED] - http://www.iki.fi/mjr/>
Transhumanist   - WTA member - http://www.transhumanism.org/>
Singularitarian - SIAI supporter - http://www.singinst.org/>


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Re: GPRS while ringing?

2007-05-07 Thread Nikita Melnikov
On Mon, May 07, 2007 at 09:38:59AM +0200, Nils Faerber wrote:
> Joel Newkirk schrieb:
> > Is it possible and feasible to establish a brief (3-5 seconds?) GPRS
> > connection when ringing an incoming call?
> > 
> > I've been thinking about callerid name lookups.
> 
> I guess not.
> First of all GPRS connection setup can take longer than this - basically
> the GPRS data connection is done using PPP.
> Second, though not being a GSM expert, I think that voice call is not
> possible during GPRS sessions. This would for me also mean that during
> call signalling GPRS cannot be established - either the GPRS or teh
> voice call will fail then.

Not really, as far as i _heard_. I got told that u can accept incoming
calls not dropping gprs connection on modern phones. Didn't test it
myself, tho, because i own some really oldschool Ericsson phone ;) 

> > j
> Cheers
>   nils faerber
> 
> -- 
> kernel concepts GbRTel: +49-271-771091-12
> Sieghuetter Hauptweg 48Fax: +49-271-771091-19
> D-57072 Siegen Mob: +49-176-21024535
> --
> 



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Re: GPRS while ringing?

2007-05-07 Thread Nils Faerber
Joel Newkirk schrieb:
> Is it possible and feasible to establish a brief (3-5 seconds?) GPRS
> connection when ringing an incoming call?
> 
> I've been thinking about callerid name lookups.

I guess not.
First of all GPRS connection setup can take longer than this - basically
the GPRS data connection is done using PPP.
Second, though not being a GSM expert, I think that voice call is not
possible during GPRS sessions. This would for me also mean that during
call signalling GPRS cannot be established - either the GPRS or teh
voice call will fail then.

> j
Cheers
  nils faerber

-- 
kernel concepts GbRTel: +49-271-771091-12
Sieghuetter Hauptweg 48Fax: +49-271-771091-19
D-57072 Siegen Mob: +49-176-21024535
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GPRS while ringing?

2007-05-06 Thread Joel Newkirk
Is it possible and feasible to establish a brief (3-5 seconds?) GPRS
connection when ringing an incoming call?

I've been thinking about callerid name lookups.

j

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