Hi,
I got a N900 with power Kernel installed.

Since the phone is kind of dead on the development side I plan on using it as a SIP Phone.
The problem is now that I can not get it to work probably.
Even with Skype its just choppy and not really usable.
As a SIP Phone my voice sounds like I am Darth Vader.
When I get called the caller is also choppy.
If I call the called person hears Vader and I have no problem understanding the called person.

The Router is a AVM Fritzbox 7490.
My provider is T-Online.
My N9 works flawless but keeping the Wifi alive is not an option since it drains the battery.
The number I am using is a landline number hence switching the Wifi off is not really feasable.
With the N900 I would just leave it pluged in all the time.

I played around with jitsy as SIP software.
There the same problem arises.
From what I was able to find there seems to be a problem with the Codec (e.g. G722).
It seems that there is a compability issue how the Fritzbox handles the codecs. If the device or the software chooses the wrong one the phenomena I described surfaces.

Is there a way to influence which codec the N900 uses?
Did anyone manage to use the N900 as a SIP relaibly?

Thx

I am sure you know this thread? But not sure if it helps you.
My SIP experiences are also not that good [but never have been with any wlan device].

Hi,
thx. I missed that one.
Hmm they recommend a different Wifi driver.
+ fix the frequency of the cpu
+ some people use different codecs

I will play around alittle.
I hope the codec is the culprit.
Thats what messes up the SIP call with Jitsi.

Not sure if the driver is still save to use since its probably based on a outdatet kernel
http://david.gnedt.eu/blog/wl1251/

It is safe to use.
And if you already use power kernel (latest version kp53) you got thos wlan drivers included as extra modules. Just search kor kp53 and bleeding edge driver.