Maybe this is an easy question...if the ISDN line is a two wire connection, why i should use a cable with more than two wires. i have a ISDN line with a rj11 jack box that the a company in Mexico installed me and a 2600 router with a WIC-1B-U that include a NT1 and that has a rj45 port, i saw the documentation for the WIC-1B-U installation and it said to use a rj48c-rj48c cable from the WIC-1B-U port to the wall jack...but i cant connect it that way due to my wall jack is a rj11, What is the specific cable i need??...i guess that only a pair of wires go across the cable no matter the ending connectors (i mean rj11-rj45 o rj45-rj45) BUT im not sure, is it ok to use a single 2 or 4 wires cable to do this work??
