Talkit.ca works good for me
I have recently made the switch to Talkit by taking advantage of the WagJag offer. In reading several other posts, I took the advice to use the Talkit system with the provided number for at least a couple weeks prior to porting my POTS landline number (the goal was to stop paying B...hell). I am using this with DSL internet at 5Mbps down and 0.5Mbps up speed, with a Netgear WNR3500L router flashed with the latest Tomato by Toastman firmware. So the setup is DSL modem (bridged) - router (PPPoE) - Talkit device (Grandstream HT286). I experienced some initial problems with quality with symptoms of "one-way" conversations (only one person could talk at a time, with other cutting out), and at times simply dropping out the phone call. I decided to do some research on the problem and found that VOIP ATA devices (eg. Talkit box) must have dedicated bandwidth to function properly and issues are usually resolved by enabling the "Quality of Service" (QoS) feature available on some routers. As a side, I must say that Tomato's QoS (especially with the Toastman version I'm using) feature is amazing and does not appear to compromise my surfing bandwidth at all (though I realize technically it does). I began by configuring my router to assign the Talkit device a static IP (can be configured on the Talkit box, though I recommend NOT doing this as re-connection is a big issue on power resets), then prioritized traffic to that IP in the QoS settings. I also added entries in the QoS settings to prioritize traffic on typical VOIP ports, namely UDP/TCP 5060-5070 and UDP/TCP 10000-20000 (a little too much leeway here, but I wanted to make sure it would work and I will narrow this as I gain experience on what the device uses). Since applying these settings, I can honestly say I have not had any problems with the Talkit device, and proceeded with the porting of my regular POTS landline number. I requested porting Monday of last week, and received an e-mail last night (Tuesday - 8 days later) saying the porting would be completed today. True to their word, my POTS line was down when I woke up this morning and the porting was completed by 1pm (I recommend planning on doing without a phone for a day if you intend to port a number with Talkit). This was well within the company's stated two-week time period, and I am very pleased with the service.
Obviously, incorporating a money-saving VOIP system into a household is not for the faint-of-heart and will require some effort and investigation to make it work properly. My system is working fantastic and I encourage the technically-oriented individual to take advantage of this great service.