What to do if PTCL Broadband Connection slow downs or stop to work completely?

I moved from Wateen Broadband [Wireless] Internet Connection to PTCL Broadband. I am extremely happy by this move: as PTCL is providing an excellent internet service these days. I am glad to have bought PTCL DSL.

Anyway, I have personally experienced a small problem [with PTCL] which is not a very big issue.

I also have seen different people complaining about the same thing. This problem is the slowing down of the internet speed or sometimes, the internet completely stops to work.

The solution for this problem is not permanent and is not official solution. But this simple trick does the required work.

Simply turn off your PTCL Internet/DSL/Broadband device and then turn it on after few seconds [wait for like: 20 or so seconds].

Do this whenever you find the internet speed slowing down or if the internet completely stops to work.

Is there any logic to this solution: which can prove that this trick will always work?

Actually, there is no guarantee that this solution will work. For me, it has worked around 98% of the time. Occasionally, the internet [for me] stopped to work because of a problem at PTCL end. That does not happen very often. Your PTCL phone line can also cause the internet to stop working.

I saw some people saying that: internet service providers [like Wateen, PTCL etc], use a method of sharing one internet connection [at ISP end] among 4-5 people. I do not know the details: all I saw was some information about ISP sharing one connection among different users, which makes the internet speed slow if maximum numbers of users are using one internet connection at ISP end.

So may be restarting the device put our line to another connection where fewer people are using the internet? This is just a thought that came in my mind and I am not sure if even 1% of what I just said is true [or not].