I have Verizon FIOS and I record television programs with a Panasonic DVR model DMR-EH75V that I purchased about 10 years ago. It is still working very well. The problem is that the DVR has to stay on one channel (3) in order to record off the cable box. The cable box is used to change channels. But my DVR has something called a G-Link. I will try to attach an image. It produces an IR (infra red) signal similar to the FIOS remote control.
I believe I can program the G-link to change channels on the cable box. But it is asking for a 3-digit code and that is what I need to know. This is not a Panasonic question – they would not know the answer because it is a Verizon issue. The cable box information label says model DCT700/US, Phase 2.7, Platform ID=176.