It gets a whole lot more complicated when it comes to cables used with CISCO routers. Therefore, when buying a router, it is advisable to discuss with the seller the possibility of changing the supplied cables for different ones, if we find out that we need a different type.
There were no problems while connecting the LAN. I had got the cables from the building administrator who was in charge of structured cabling. I was interested in only two interface types—the WAN and console.
The most often used WAN port is the universal synchronous-asynchronous serial interface with the CISCO DB-60 connector. By choosing an appropriate cable, we will also choose a particular physical layer protocol that will be used by the router for communication. If you intend to use the V.35 protocol, you have to get a cable that has a DB-60 connector on the router side and a V.35 interface on the modem side.
The V.35 interface might be the DTE or the DCE (see Figure 3.3 in Chapter 3). The DTE is...