text: crossover cable can be dual-used? can i use a crossover cable to connect a system directly to another system and/or use it to connect the system to the internet(router)? it depends on the kins of router you have. if your router has an 'uplink' button, then you can use cross over or straight through. chances are that you have a standard home router. in that case, you have to use a 'straight through' cable from the pc to the router. your crossover cable is mostly intended to conect pc to pc.