Sabrina Kilian wrote:

> Compare the cost of having and maintaining a telephone exchange. I can't
> imagine the phone companies sell/rent those very cheap, when you want to
> have different numbers for each phone, instead of just extensions.

They do when they're selling it to an entire business park. ;-)

> Keep one telephone in the network control room. You won't need to keep
> the whole PBX just to keep one line active. What it also means is that
> when the network does go down inside, you don't have everyone calling to
> tell you.

No - they'll use SneakerNet. :-S

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