NOKIA E62: Tools - Settings - Connection - "Internet Tel. Settings" option is missing

[kookadookalowe]

Did anyone try to configure and use SIP protocol stack which Nokia E62 has by default? (Tools -> Settings -> Connection -> "SIP Settings")

I've tried and confirmed that it can be configured and that the Nokia E62 can communicate with SIP gateway. But the next logical step is missing...

Check the phone screen shot picture on page #4 of the next Nokia’s document:

http://nds2.nokia.com/files/support/nam/phones/guides/Nokia_E62_Configuring_en_1.pdf



... the next logical step supposes to be configuring Nokia E62 to use SIP for Internet calls, but the option (Tools -> Settings -> Connection -> “Internet tel. settings” ) _IS_ missing.

I did try different firmware (Cingular, Rogers, several Brazilian operators and finally US_Unbranded firmware), but all of them have "Internet tel. settings" option disabled. Looks like Nokia (not operator, as I checked it on Unbranded firmware also) disabled this option for Nokia E62, but keep it enabled for Nokia E61.

For example... Several threads show that owners of Nokia E61 were able successfully use their phone as a SIP client. But they _HAVE_ "Internet tel. settings" option enabled. In Nokia E62 it is removed (I believe on a firmware level):

http://www.fonosip.com/english/nokiae61.html

http://support.gizmoproject.com/index.php?_a=knowledgebase&_j=questiondetails&_i=207

http://www.nokme.com/e61-voip-sip-setup-with-pbxes-and-gizmo-17.html

Your thoughts and comments are welcome,
l0h

 

[987654321]

perhaps because EDGE isn't fast enough for VOIP calls? The E61 has WiFi AND 3G, so it could handle them with ease. Just a thought.

 

[I LOVE MY MARINE]

Short version of the answer is that VOIP is a fairly ugly beast, and EDGE is not going to be fast enough.

Long version below:

Let's assume that the Nokia SIP client is doing PCM encoding for the VOIP calls. That's 64kbps before IP headers and encapsulation. Call it 80kbps with all the packet overhead. And this data rate is both for voice into the phone (downstream) and back out (upstream).

Then class 10 EDGE gets you 5 data channels in use at one time, up to 4 channels down and up to 2 channels upstream. Best case scenario is that you are standing next to a tower with less than 25% utilization. That would give each EDGE channel about 20kbps. So if you use 3 down and 2 upstream channels you would get 60kbps downstream (2/3 what VOIP would need) and 40kbps upstream (about half what would be needed).