hai iam using type two modem,it has 4 ports,i
connect one to my system,& another connect to
another system,but problem is at a time two
systems are not connected only any one of the
system is connected what is the problem
What exactly are your trying to do? Is it to network between the two PCs; or are you trying to share the modem connection between the two PCs so as to get both on-line? And presumably you have a dsl/broadband service too?
im trying to share the modem connection between the two PCs
If this is just a modem then either you set one PC as the connection to your isp, and then setup ICS (InternetConnectionSharing) on that PC to allow/enable the other to access and use the modem and your isp... via that PC to which the modem is connected. Or...you get yourself a router and connect the modem to your isp service; connect the router to the cat-5 connection on your modem; set up the router correctly; connect PCs to the router - not the modem; then both PCs access and use the modem via the router.
Even easier is to get yourself an all-in-one access router; it has a built-in modem and is a router as well. That access-router approach is much simpler to set up overall...
This again presumes you have broadband or cable equivalent; not using straight dial-up (the "olde" way...)
You have ICS as part of XP OS; so as you already have the modem... you really have all that's needed to set up a basic share the modem system. However for the second PC to assess/share th modem (and the www) that first PC "must" be on and booted up etc. It is the gateway to the isp for the other PC...
With a router included - either a separate router linked/connected to the modem and the PCs into the router - NOT the modem, you can only have whichever PC on as you wish (or both); neither PC is controlling the access to the modem; it's all via the router
And similarly with an all-in-one (access-router). Only the PC you wish to go on-line with needs to be on...
The router path is by far the best...