[RichG]

Hi Ron,
I'll have to open the junction box to check on how it's wired. The other pair may be connected but is no longer in use. I guess I could check the Tip and Ring voltages.  The series capacitor would block any DC.  All utilities in my area are underground.  Though at some point, the phone lines probably go up a utility pole.  There is a huge telephone line splice box just outside my house, but there are no overhead lines going to the box, it's all underground.  Still, it's worth a try.  

Thanks,
Rich