I am new user of ptcl dsl,
I connected my ptcl dsl 1 mb with two pc's,
And if you want to divide your connection then but switch Rs-500 to Rs-1000 depend on quantity, i am using tp-link switch price Rs-1100,
Connect you ethernet cable from modem to switch in post 1 and then buy 2 cable wires and connect in both pc's, then on second pc in which you are going to share your internet use these settings to make internet connection work,
Go network connections, local area network properties, tcp/ip settings, select obtain automatically ip, dont select obtain auto dns use manual and put prefered dns: 188.8.131.52 and in alternate use : 184.108.40.206 then press ok
and start browsing
This means if you want to connect two pc's then router is not required because dhcp assign ip automatically.
If you having any problem discuss here,