All 3 telco share facility eg. fiber optic and cable. If main cable station down all 3 will affected.
Just like electricity all power station sharing same power cable to end user which is manage by SP.
M1 I have not tried, would not want to...Starhub is "broadbang"... ha ha ha used to be one of their tester..when people we surfing at at 64k, I was using mb..when they were known as CYBERWAY...it was good initially..then it went down hill
i know halon fire suppression systems in telco exchanges are banned in some cuntries, but what about other inert gas or "clean agent" systems such as fluorinated ketone and hfc fire suppression systems? does sing and tell use newer non-ozone-depleting systems?