You must be having a bad day, this is not like you. Are you not up to your usual sharpness?
is your friend.
I guess that the connection is possibly wireless due to a wired infrastructure limitation. Doubtless the setup is proprietry and probably wireless. PTCL is Pakistan Telephone Company Limited (guessing of course) and TCS is Tata Consultancy Services. Tata is a company BIG in Indian steel and launched the worlds cheapest(?) family motor car during 2007 or 2008.
I'm maxed out at this point, but hope it's enough of a thread for someone to grasp. I don't suppose that Forculate has considered moving telephone zones?
A retrospective look at Google maps puts Khanewal, Pakistan pretty much on the Pakistan/Afghan border. I exagerate somewhat of course, nearer 400 miles, but a little over 100 miles from the escarpment, on THE main road in the area. Local industry may well major in hard rock quarrying for the whole continent. Another exageration!
Relocation is definitely a high priority to get a choice of ISP not using wet string as a communication medium.
Don't know that I've been a lot of help to you indirectly Forculate, but Tink is surely up on his geography and knows a little more about your local situation already.
I don't suppose that it's an ADSL type of connection. The phrase "This ISP doesn't support *Linux* usually means that they don't answer questions about it", usually due to lack of appropriate technically competent staff. If the protocol in use is TCP/IP then the protocol is standard open source anyway and not a problem.
Do you run software that runs the connection protocol to your ISP? Is that software necessary. I ask this question because a friend of mine was going to load ISP provided connection software until challenged why. He is broadband connected, so doesn't need it. Ubuntu would connect for him with a couple of clicks. I imagine that your connection is dial-up, perhaps you can help us understand that part. A lot of us have largely forgotten about dial-up because in the west it has been eclipsed for some time now.