In our building, the demarc is on the complete opposite side from the network closet. So, the T1 is extended from the demarc with a CAT5E cable that runs across the building to the network closet and terminates at a RJ48X jack. From the RJ48X there is a thin, flat, network(? not labeled) cable that is run to the T1 modem/router.
We're switching to Comcast. Comcast installed the modem at the demarc. So, now I have to run from the modem all the way across the building with CAT5E. My question is, can I use the extender that is currently running from the T1 demarc to the RJ48X jack in the network closet to extend the cable modem?