narwhal,
Hope you will never have to dial 9-1-1 from your office. If one of your employees got hurt and the EMS can't get there on time to help, I am afraid the law suite will be far greater than the savings of your monthly phone bills.

You need to look into that in depth before you make such move. Remember....you get what you pay for.

__________________
95 R129
04 Infiniti G35.5 BS
10 X204