You can share your regular house phone line with this device. It just takes a regular modular phone plugin just as if you were plugging in an answering machine or any other single line device to your existing phone system. All you would need to do is to run a phone line to your water pump shed and attach a standard modular phone receptacle. The Sensaphone will plug directly into the receptacle. With respect to sharing the phone line, that is what we do here. Now, if someone happened to be actually talking on the phone in the house when a parameter was triggered, the Sensaphone just couldn't dial out, but it would keep trying according to the dialout pattern you have set. In fact, I believe that you would hear it attempting to dial while you were talking. The only other situation that I could see occurring if you share your phone line, would be if you were at your place, had the Sensaphone on, and someone called you. If you don't pick up your telephone quickly enough, the Sensaphone would answer. This is the feature that allows you to call it from a remote site and check the status of the sensors you have connected. For instance, you can call this unit any time and it will report the temperature by voice on the sensor. However, the number of rings that occur before the Sensaphone picks up can be set as well and you could set that to a very high (10 or more) number, or just disable the Sensaphone while you are at your place. (There is a standby mode that can be activated quickly on the unit.) I thought of the name of the company where we bought our units. It was QC Supply at
www.qcsupply.com. I just checked their web site and the price on an 1104 is $339, so the price has come up a bit. You might do a search on Sensaphone and come up with a better price.
Good Luck.
