As in, a toll free number, that others call to call you?
You should be able to do that.. now, i am not sure that rogers themselves offer it.. .but there are 3rd party ones out there.. where it really just does a re-direct/forward to your existing phone number.
Rogers directly may not without being a business Account.
There are 3rd party services which do offer this.
Just curious as to WHY you need it? If its for a home business.. may be worth talking to them about a business account, for base business services may not be that much a price difference.. and they usually have better service level agreements (for outages, etc) than household accounts.