6 Dec
2000
6 Dec
'00
7:06 a.m.
5) Lots of phone lines (including conference and analog)
that can call in and out and internationally
Add to this, some mobile / cellular phones. If your phone lines go down, which can and DOES happen at times of crisis, these can be critical. Even if there is no crisis, but phone lines to your NOC go down for a few hours, you'll need these to communicate with the outside world.