I am located in a rural area which does not have cellphone service to the house. But yesterday, using a signal booster and external antenna, I was able to get cellphone service working reliably, but at a shed located up on a hill. The shed does have a CAT6 cable to the house (about 80 meters distance). In the house I have several phones connected to my Gigaset C610A IP device, which includes both VOIP and analog phone capability.
What I would like to do is install some sort of box at the remote shed which has an cellphone antenna on it so it can connect to my Spark mobile service. The box would then plug into the CAT6 cable and 'look like' a VOIP service to the Gigaset box back at the house. The idea then is I can receive a call through my Spark mobile service and it will ring on the house phones. And likewise, when I make an outgoing call on my house phones I can select the 'VOIP' line and it will go out through my mobile service.
Is this possible? What box can I use to do this?