Just wanted to share my experience with everyone. I had home phone and DSL with Brand X. I signed up for freephoneline.ca , purchased ATA, purchased SIP configuration settings. I was able to get my ATA up and running and very impressed with quality. I tested for a few days....then decided time to port my home number to fongo (freephoneline). I followed instructions, not to contact Brand X, until I had a confirmation the porting was successful. I received a email stating porting went through..., checked my sip settings and saw my home number instead of the freephoneline.ca number . All good

In closing, just wanted to share my experience and if I did something wrong based on my explanation can somebody make suggestions so others do not go through this. I never expected a seamless transition because of all the variables so I'm not really surprised so to speak..... As for freephoneline.ca and fongo thus far I'm very impressed with their customer service, communications and the quality of their VOIP service.
Cheers all