I signed up for triple play 8 business days ago with a ported number requested from verizon and the Comcast website lists that as the number, but the cable/voice modem (Netgear 1150, comcast approved) doesn't initialize for phone, and my number from Verizon is still alive and well.
I have the same questions as you and others. I don't know how to even know when the number will be active, how to get the voice modem to work, and nobody at 1800 can help. Frustrating.
So my story gets even more frustrating. At the advice of others on these forums, I called Xfinity/Comcast and asked for tier 2 support. At first, the automated voice lady told me to reboot the modem (which I had done repeatedly to no avail), and when I did that again, I finally made it thru to a person who absolutely would NOT put me thru to tier 2. She reluctantly, under my own forceful suggestions put me to a supervisor.
The supervisor was more than useless. She had me on hold for about 20 minutes then gave me a cocka-amamie story about how I have to accounts and they are trying to straighten it out (meantime, I have a phone line that Comcast now has but no way to connect to it, so anyone who calls to it goes to dead space. At least I was able to forward it on their app to my cell phone).
She hung up after 20 minutes with a promise to call back "in about 5 minutes". Well 5 minutes has turned into 10 hours or more. And still no phone line.
I feel as if Comcast has written a book a "how to lose a loyal decades old customer in 10 steps"