Thank you all folks for the excellent feedback. Still working on details.

Paul:
Re: Power, that is a very important issue. But if there is no power, we have to close the office anyway and go home. (may be go to nursing home/hospital to see patients- they always seem to have some auxillary power). If power does not come for extended periods of time, patients seem to understand. Even with old telephone line, we have a switch box, which needs power, the battery back UPS will last for say 10 mins and then the phones are dead anyway. Can't do anything. Patients have shown patience so far in those extenuating circumstances.

One close by office have this cable phone. I am waiting for email reply from technical person at that multi doc office.

Somebody suggested calling telephone company and see if they will match this new service charges from their competitor. I personally doubt it, as it is 1/2 of what they are charging. But I will give them a call. Phone companies seem to have Bank hours, whereas cable companies are 24/7/365.

Somebody suggested: if I sign up for cable phone, if it does not work out for whatever reason from Cable company's side, I am not obligated to pay severance fee if I leave half way through. That is an excellent suggestion. But they seem to have boiler plate contracts.

Somebody suggested asking the cable company for a business reference. Cable company says they are searching for doctors office. They seem to have a lot of Churches with cable phones. I always believe God will save us.

I am strongly leaning towards this. May be I can be a early adopter per Geoffrey Moore- http://en.wikipedia.org/wiki/Crossing_the_Chasm

We got phone service from cable company at home a week ago to try it before I tried at office. So far it seems to be ok. Of course I have ordered a Back UPS to the phone modem, this is not VOIP again, it is separate from internet, they are independent of one another.

Cable company sent a contract. Longer the contract, lesser the price by about 100$ per year. But I will go for 1 yr to try it out.

Friends, now wish me best of luck.

Best wishes.