Question:  What is the best way to interface my Panasonic AG-HPX255 camcorder into an existing Encore party-line system?  Do you make an interface that would allow this to happen easily and cleanly?
Answer:  The specific camcorder mentioned doesn't have a intercom connector interface or a camera CCU to interface the party-line to, in this case the best way to go would be to let the camera operator use an RS-701 series party-line beltpack and connect the beltpack back to the existing party-line system via 3-pin XLR microphone cable as shown below.  This would provide exceptional audio quality back into the existing PL system and avoid the need for an expensive 2-wire / 4-wire interface module connecting unbalanced audio inputs and outputs from the camcorder.