Thanks for everyone who has replied.

Seem like phone wires can be placed close to power line without any
problem as long as they are separated by a couple inches. This is good
to know that. This means I don't need to move the existing phone
wiring.

Also thanks for pointing out that the phone wiring need to be kept away
from floursecent ballasts. I am sure mine doesn't have this problem
because there are only three floursecent lighting fixtures in my house.
I will double check just to be in the safe side.

My home networking wiring book recommends keeping wiring at least 8
inches from the power line. I probably got the impression of the need
of separating phone wiring from power line from that book. Now, I read
the book again; I have a feeling that it is actually referring to data
network wiring, not phone wiring. Sorry for the misunderstanding.
Thanks again.

Jay Chan