VOIP and data only

ccoager · 03-16-2010, 08:42 PM

I am interested in the Nexus One particularly for VOIP on a data only plan. I'm planning on using this with Asterisk which I have experience with so I know a bit about voip, codecs and such. I have read some mixed results on Nexus One VOIP over 3g. Is the issue poor latency on 3g? Is it because G.711 is too much bandwidth for 3g? Would a codec like G.729 or GSM work well? Is the VOIP carrier the issue? Is it a hardware/software issue with the phone? Would qos/dscp resolve the issue? Is the issue the sip/iax application?

Looking for some feedback, thanks!

davidalow44 · 03-17-2010, 07:13 AM

I don't think the issues of VOIP over cellular towers on N1 have been rigorously characterized. Mostly anecdotal, e.g:

I have tried using Sipdroid (G711 - this software does not incorporate G729) through SipGate over AT&T 2G and it was dismal. High percentage of dropped packets. Over WiFi this combination worked satisfactorily.

Skype (G729, I believe) will allegedly be releasing a mobile version for Android soon, and the fact that they are touting a partnership with Verizon seems a good sign.

03-16-2010, 08:42 PM	#1
ccoager Junior Member Member #4851 Join Date: Mar 2010 Posts: 6 Phone: Not Listed Carrier: Not Listed	VOIP and data only I am interested in the Nexus One particularly for VOIP on a data only plan. I'm planning on using this with Asterisk which I have experience with so I know a bit about voip, codecs and such. I have read some mixed results on Nexus One VOIP over 3g. Is the issue poor latency on 3g? Is it because G.711 is too much bandwidth for 3g? Would a codec like G.729 or GSM work well? Is the VOIP carrier the issue? Is it a hardware/software issue with the phone? Would qos/dscp resolve the issue? Is the issue the sip/iax application? Looking for some feedback, thanks!

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03-17-2010, 07:13 AM	#2
davidalow44 Senior Member Member #1536 Join Date: Jan 2010 Location: Massachusetts Posts: 125 Carrier: T-mobile	I don't think the issues of VOIP over cellular towers on N1 have been rigorously characterized. Mostly anecdotal, e.g: I have tried using Sipdroid (G711 - this software does not incorporate G729) through SipGate over AT&T 2G and it was dismal. High percentage of dropped packets. Over WiFi this combination worked satisfactorily. Skype (G729, I believe) will allegedly be releasing a mobile version for Android soon, and the fact that they are touting a partnership with Verizon seems a good sign.

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