1sourcesd 0 Posted July 8, 2013 so I have a customer that has an older spectra III ptz camera that he wants me to hook to his digital watch dog dvr but it has the tx+/tx- and rx+/rx- on the camera side and on the dvr side all it has is the rs 485 mot sure if it evan going to work just thought I would throw it out there and see if there is anyone that has a insight to these older cameras Share this post Link to post Share on other sites
Dontheo 0 Posted July 9, 2013 They made many different spectra models and accessories. Do you know what it was connected to before? I think it communicated in a pelco 422 format? I would go to the pelco site and see if you can find your model. If it is no longer made they usually post the manuals and you won't need a password. As transmission methods grew they seemed to come out with a new interface and I think got as far as some early cell phones. Nice camera though if it is in good shape. Share this post Link to post Share on other sites
