bijan wrote:
We used to have the router upstairs but it was moved to the first floor and apparently at the same time the cable that is in upstairs was disconnected ... I tried to connect the downstairs router upstairs to see if the cable was active but found out that the cable is no longer active ... how can I reactivate the upstairs cable so that I can run a second modem upstairs? ...
If you have Verizon come out to reconnect a coax cable or run a new cable somewhere, you will very likely find out that there's a charge, and probably not a small one. However you should be able to do the job on your own.
It should be easy to reconnect, but you must locate where the coax cables in your home terminate. I.e., it's likely that all the coax was at some time in the past run to one central location. Previous wiring arrangements used splitters of some sort to connect them together and then connect to the incoming signal. However it depends to some extent on how long ago your house was wired, because in the distant past variations on "daisy chain" wiring were used. In such schemes all of the coax may not terminate at a common location.
The common terminus for your coax will most likely be in the basement, or on an exterior wall of the building. If you know where the Verizon ONT is (that's the main Verizon box where the signal comes in and is distributed elsewhere), then that's probably where the splitters are and where the coax is terminated. Once you determine the common location, you will be able to locate the disconnected coax and reconnect it to whatever splitter is there. If there are insufficient terminals on the splitter, it's usually possible to get a larger splitter (more below).
From your description it sounds like the installer disconnected the upstairs coax because he/she did not have enough terminals. A larger splitter will fix this. Just be sure your new splitter meets the required specifications: bidirectional, passes 5 - 2000 Khz.