Now that I have upgraded my DirecTV TiVo receivers with the Zipper, I no longer need my landline. Is there anything I need to know before calling DirecTV to tell them "My home phone has changed to 601-xxx-xxxx, but my address is the same"? Of course, I am not telling them that this new number is a cell phone number. I assume that they won't send a signal for the receivers to call home just because the phone number changed, right? I just want to be sure I switch the "home phone" number correctly PRIOR to actually disconnecting the landline and going with just DSL service only.