I'll help explain how this works. Each cabinet has a limited number of ports, these are physical ports. Each subscriber gets 1 port physically routed to them and in some cases even 2. So if there are no extra ports you wont get a port until they add more. Both TM and Maxis share the same cabinets (maxis using TM infrastructure).

Cable on the other hand uses a shared topology allowing for many subscribers and the stereotypical Cable ISPs are bad thing but theres no cable in malaysia, only DSL and fiber for wired.