Audio latency in one side

nagu · 12-26-2010, 10:34 PM

Folks,
I am trying to configure voxalot to make calls from my mobile device through 3G. My Mobile provider blocks all ports except 80 and 443. Hence to circumvent this issue, I started configuring my device to make and receive calls. After a lot of trial and error, I am finally close to success. As of now I am able to receive and make calls. However, there is a latency problem in audio. Apparently the latency is only in oneway! While sending voice from my mobile device to the other side, there is some latency. But there is no latency in receiving audio to my device. This happens irrespective of the VSP.

My Voxalot Settings
Symmetric NAT Handling [Yes]
Optimise Audio in all VSPs [No]

Mobile Device settings
Protocol : TCP (Mainly for reducing the battery drain. Also helps circumventing port blocking)
Keep awake in background is set to off.
Proxy: EU.voxalot.com:443 (80 also has the same effect)

Other settings are as follows

Audio codecs

Nat Traversal

Appreciate any help.
Thanks,
Nagu

kurun · 12-30-2010, 04:58 PM

I ran into this one way latency some time ago.
IMHO, this is a limitation of the internet service for uploading packets, or a delay purposely introduced by the ISP to make VoIP calling virtually unusable.

12-26-2010, 10:34 PM	#1
nagu Junior Member Join Date: Dec 2010 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	Audio latency in one side Folks, I am trying to configure voxalot to make calls from my mobile device through 3G. My Mobile provider blocks all ports except 80 and 443. Hence to circumvent this issue, I started configuring my device to make and receive calls. After a lot of trial and error, I am finally close to success. As of now I am able to receive and make calls. However, there is a latency problem in audio. Apparently the latency is only in oneway! While sending voice from my mobile device to the other side, there is some latency. But there is no latency in receiving audio to my device. This happens irrespective of the VSP. My Voxalot Settings Symmetric NAT Handling [Yes] Optimise Audio in all VSPs [No] Mobile Device settings Protocol : TCP (Mainly for reducing the battery drain. Also helps circumventing port blocking) Keep awake in background is set to off. Proxy: EU.voxalot.com:443 (80 also has the same effect) Other settings are as follows Audio codecs Nat Traversal Appreciate any help. Thanks, Nagu

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12-30-2010, 04:58 PM	#2
kurun Join Date: Sep 2006 Location: Toronto, Canada Posts: 568 Thanks: 70 Thanked 147 Times in 115 Posts	I ran into this one way latency some time ago. IMHO, this is a limitation of the internet service for uploading packets, or a delay purposely introduced by the ISP to make VoIP calling virtually unusable.