What Voip quality did you experience?
 

Hello,

I got to say I'm disappointed by the voip quality. Someone wrote, that the quality of voip is as good as normal cellular calls.

That's far from the trooth for me.

I got to say on wifi everything's fine. Skype and sipgate, but on 3G even on HSDPA it's unusuable.

But why? HSDPA support up to 7,2 Mbit/s. Shut be far enough for voip-calling.

Is the uploading the problem? It can't - because both directions are horrible.

What are your experiences on skype or voip on 3G?

Can I change something on the codeces?

Would be happy about some tricks. I thought having a sip-account would be an easy for for people to call me everywhere for free....but it doesn't work, even not when connectet via hsdpa.

By the way, using my SIM vis USB on my PC the connection is quite quick.

Thanks for tips.

Bye
MPW

Re: What Voip quality did you experience?
 

it could be your provider throttling voip/skype

Re: What Voip quality did you experience?
 

voip is good on N900.

however, check:
-Router settings
-Codecs chosen by other side or gateway
- bandwiidth

Have to confirm voip is well implemented and pretty robust on N900.

Re: What Voip quality did you experience?
 

I have observed no issues using both Skype and Google Talk using 3G even though my download/upload speeds are limited to 900 kbps and 400 kbps respectively. They are as good as cellular calls, sometimes better.

Re: What Voip quality did you experience?
 

I have some problems with voip over 3G, it works fabulous with WiFi. It worked fine before but i think i messed something up by loading a lot of dev stuff for testing. The other party hears me fine, I however only hear some voiceblubish noise... I think reflashing will solve this, but anyone has any idea what may be causing this? IT happens on skype and gtalk.

Re: What Voip quality did you experience?
 

On my n900 skype works fine, but the sip-quality (operator: sigate germany) is quite bad using 3G. so it might be the a matter of the codec. Sip seams to cause more traffic.

Using voip with sip over wifi my nokia 6300i has a better quality (6300i has no 3G so I can't compare that). So when I'm at home I still prefer my 6300i for sip-calls, because of the bad implementation of sip on the n900.

I really like to see nokia to implement the same sip functionality on the n900 as they did on the 6300i!

PS: Offtopic, but I hate the way the n900 displays sip calls. E.g it shows numbers like sip:01234567890@sipgate.de instead of showing the contact from the address book.

Re: What Voip quality did you experience?
 

Don't forget that low latency is very important for VOIP. All the bandwidth in the world will not help, if the bearer (i.e. your cellular network) has a high latency.

Re: What Voip quality did you experience?
 

Sure, but skype works and sip doesn't. So it's not a matter of my cellular network, isn't it?
And when I compare my two nokia phones the n900 stays behind.

Re: What Voip quality did you experience?
 

Bad news.

It's T-Mobile's fault! What the ****, that pinky company really slows the connection down when you're using Skype! Unbelievable.

Ok - they say it doesn't work. But saying that and manipulating the connection are two things.

I did the following test:

Connected the N900 via wifi.

Connected the pc via umts-stick.

Went online via skype with two accounts.

Calling one from the other worked for about 3 seconds, than the connection slowed down and you couldn't understand anything anymore.

Then I connected the notebook via vpn with the server of my university - and then calling via skype worked great!

I use T-Mobile Germany with the Combi Flat M tariff.

I will probably have to find a vpn client that works for the n900. Gonna search...

Bye
MPW

Re: What Voip quality did you experience?
 

Your usage of VOIP over their Flat-M tariff appears to be outside the terms of the tariff - so their curtailing of such usage could hardly be described as being: "T-Mobiles fault".

I use T-Mobile Mobile-Broadband-Plus (in the UK) which specifically prohibits VOIP usage - if you want VOIP then their Mobile-Broadband-Max tariff accommodates such usage.

Don't get me wrong - I think the Service providers are taking the p*ss - For example if an account is sold as "UNLIMITED" but there is a little * which says "Max 3GB a month Fair usage applies" then it is NOT UNLIMITED. Be that as it may, if I pay T-Mobile for a 3GB per month data pipe, then it should be up to me how I use that 3GB - browsing, email or VOIP.

Also - as you have found, if your VOIP traffic doesn't look like VOIP traffic because its inside a VPN pipe then you don't get penalised. :rolleyes:

Re: What Voip quality did you experience?
 

I'll second that - Last Thursday I ran an 90-minute conference call using my Sipgate account, with the N900 setup as a speakerphone and four of us talking to two overseas offices.

My boss almost canceled the call beforehand, because we couldn't get one of the meeting rooms which have a conference phone - He wants an N900 now :p

Re: What Voip quality did you experience?
 

Hello,

in my opinion the point is, surfing on youtube causes MUCH MORE traffic than voiping.

Youtube is okay - but the litte bit of voip not, because they want to make money!

I can confirm that voip via VPN works great! (on 3G of course!)

I just got to find a way, to enable VPN for 3g connection automatically.

see here aswell: http://talk.maemo.org/showthread.php...highlight=vpnc

Bye
MPW

Re: What Voip quality did you experience?
 

I have been doing a bit of testing and changed the codecs. I am using the G729 codec and have disabled the iLBC codec.

VoIP calls over 3G are now fine. Not perfect, but more than acceptable and a big improvement over calls made before I changed them.

Calls over WiFi are fine too. Well, at least the test calls to mobiles I made.

To edit the codecs file, you can follow these instructions(credit to Jakiman on the Whirlpool Forums:

1. Install an app called Leafpad
2. Install an app called rootsh
3. Now go to xterminal then type:
root
4. Make a backup of the gstcodecs.conf file using following command:
cp /etc/stream-engine/gstcodecs.conf /etc/stream-engine/gstcodecs.conf.orig
5. Now run following command:
leafpad /etc/stream-engine/gstcodecs.conf
6. Leafpad app will open the file.
7. You can now edit that fie then save it. Done.

To restore the settings to their original settings, you can do the following:

cp /etc/stream-engine/gstcodecs.conf.orig /etc/stream-engine/gstcodecs.conf

Re: What Voip quality did you experience?
 

hello

for what is worth I just tested VOIP with skype and quality was the same as a normal voice call over 3g and over WIFI.

I am happy to post any settings if you know what I should look for!

Cheers!

Re: What Voip quality did you experience?
 

I just did a 2.5 hour call via gtalk/jabber and it was perfect the whole time.

Re: What Voip quality did you experience?
 

VOIP over O2's 3G was very good for me in Germany.
You could look at O2's plan. They have a monthly flat of 25 euros or so I think.

Re: What Voip quality did you experience?
 

Tested on wifi with voipcheap: works great even better than on my N95 8gb!

Re: What Voip quality did you experience?
 

https://bugs.maemo.org/show_bug.cgi?id=6936

it might be related to this bug which is apparently nearly fixed, i hope they just push it before PR1.2 ...