I have 1
new Panasonic WJ-MP204C Data Multiplex Unit to trade for either a
used Uniden 296D or new 246T. I will also consider trading for a
new Panasonic WV-CU360C System Controller.
This unit is used in CCTV applications to setup/control 4 cameras (multiple units can be daisy chained if more cameras). With Panasonic cams (ie. WV-CP484), you can access the cam setup menus remotely w/o having to go outside and play with menu buttons on a ladder which is a pain. This data multiplexing feature is built into Panasonic DVR's and other Panasonic video multiplexers on the 1st 4 ports if not mistaken. This unit would normally be used if not using a Panasonic DVR, or an old VCR/Time Lapse system. See
Panasonic's site for more info.
PM if interested.