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Comment A and B systems (Score 4, Interesting) 26

Back in the last quarter of the 20th century, many POTS telephone switches had an A side and a B side.

During software upgrades - and yes those were a thing - they would route all new calls to the A side and wait until the last call on the B side ended before they would take the B side down for the upgrade.

Then they would do some testing before bringing up the B side.

Only after they were confident that the B side was working would they upgrade the A side.

This worked in part because they could schedule upgrades when the load was low enough to be handled only by half of the switch's capacity.

Comment IPO price probably set too low (Score 2) 24

I don't know how IPOs work in China but if this happened in the US, it would indicate the IPO price was set way too low.

The idea "IPO spike" is about 0 or maybe a little bit above 0.

If it drops on the first day that's obviously bad.

If it's goes up it means the company left money on the table. Sometimes its good to leave a little money on the table to give the IPO underwriters an others a reason to stay excited about your company.

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