Crane, Matthew wrote:
With a point to point link what would be the minimal software stack
needed? There's only so much CPU, might it be more appropriate to use a
relatively lightweight process to rx/tx+encrypt/decrypt the data?
In any case, the idea of an open encryption standard for cell
On Sat, 3 Feb 2007, Ian Stirling wrote:
Even a really anemic processor can manage AES or whatever at 8Kbit/sec, in
realtime.
However, as a near-zero CPU option, you could always use one-time-pads from
the SD.
Key management is substantially more annoying - you need 3M or so of pad per
call.
Conveniently enough, I think the device will have that capacity as
well.
On 2/2/07, Robert Michel [EMAIL PROTECTED] wrote:
Salve!
Does anybody has experiances/ideas about Voice over GPRS?
How long is the delay? It could maybe used for asyncron
voice communication Talk2Talk (instead
2007/2/2, Robert Michel [EMAIL PROTECTED]:
Salve!
Does anybody has experiances/ideas about Voice over GPRS?
How long is the delay?
I heard it could be pretty lond delay (like a second or more). It is hard
to use programs such as skype. Walkie-talkie like solution is very
interesting
* Robert Michel [EMAIL PROTECTED] [070202 17:06]:
Salve!
Does anybody has experiances/ideas about Voice over GPRS?
How long is the delay? It could maybe used for asyncron
voice communication Talk2Talk (instead of pushing a button)
The lag with E+ for GPRS/UMTS is at best in my experience
* Terrence Barr - Evangelist, Java Mobile Embedded [EMAIL PROTECTED]
[070202 17:56]:
VoIP calls typically require approx. 120 kbit/s *each*
direction, that's 240 kbit/s for a two-way conversation.
UMTS gives you 384 kbit/s if you're lucky. Most of the time
it's more like 150 kbit/s, so
On Fri, 2 Feb 2007, Robert Michel wrote:
Does anybody has experiances/ideas about Voice over GPRS?
See: http://www.cl.cam.ac.uk/~rc277/globe02.pdf
They discuss tcp as well as udp performance over GPRS.
How long is the delay? It could maybe used for asyncron
voice communication Talk2Talk
On Fri, 2 Feb 2007, Terrence Barr - Evangelist, Java Mobile Embedded wrote:
Also, most data plans specifically prohibit VoIP usage
and may even prevent it technically.
AFAIK, only T-Mobile did that, and they removed that clause a few months ago.
Paul
* Paul Wouters [EMAIL PROTECTED] [070202 18:18]:
On Fri, 2 Feb 2007, Terrence Barr - Evangelist, Java Mobile Embedded wrote:
Also, most data plans specifically prohibit VoIP usage
and may even prevent it technically.
AFAIK, only T-Mobile did that, and they removed that clause a few
be
lower
On 2/2/07, Robert Michel [EMAIL PROTECTED] wrote:
Salve!
Does anybody has experiances/ideas about Voice over GPRS?
How long is the delay? It could maybe used for asyncron
voice communication Talk2Talk (instead of pushing a button)
In Germany did three Prepaid Provider published
.
AFAIK, only T-Mobile did that, and they removed that clause a few months
ago.
Eplus does have that clause too.
Who cares? When the communication is asyncron we could store the
voice date in one file that even is encrypted...
.. when we talking about asycrone Voice over GPRS
- voice chat
On Fri, 2 Feb 2007, Andreas Kostyrka wrote:
AFAIK, only T-Mobile did that, and they removed that clause a few months
ago.
Eplus does have that clause too.
Ahh, not too familiar with the German markets.
Plus running standard VoIP protocols like SIP and friends over a NAT
firewall that
* Robert Michel [EMAIL PROTECTED] [070202 18:26]:
Incoming bandwidth: 14.5 Kbps
0.01 Mbps
1.81 KBps
0 MBps
Outgoing bandwidth: 14.5 Kibps
0.01 Mbps
1.81 KBps
0 MBps
Total bandwidth (incoming and outgoing): 29 Kbps
0.03 Mbps
3.63 KBps
0 MBps
29Kbps = 3.625 kByte/s
* Robert Michel [EMAIL PROTECTED] [070202 18:58]:
Salve Andreas!
Andreas Kostyrka schrieb am Freitag, den 02. Februar 2007 um 18:44h:
Looks nice, BUT you don't have always a 14400 bps uplink.
But even iax2 has a huge overhead - mybe still potential to
optimize the protocol?
So my
Salve Paul!
Paul Wouters schrieb am Freitag, den 02. Februar 2007 um 18:13h:
On Fri, 2 Feb 2007, Robert Michel wrote:
Does anybody has experiances/ideas about Voice over GPRS?
See: http://www.cl.cam.ac.uk/~rc277/globe02.pdf
Thank you, I direcly put this good source into our wiki
On Fri, 2 Feb 2007, Mikko Rauhala wrote:
Of course, you can make a GSM data call (I presume) and thus reserve
That's what www.cryptophone.de does to avoid latency issues. Some networks
block mobile to mobile data calls though.
Righto, so somebody's doing it already on free software.
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