On 22 Mar 2016, at 21:41, Neil J. McRae wrote:

At scale? I’m not so sure!

Well that rather depends how much you think your POTS plant costs you.

A wien bridge oscillator, to pick one of the many possibilities, is not a particularly expensive or difficult thing, but that misses the point somewhat.

A POTS facility isn’t technically required by many, but effectively it is not optional. It can be omitted by LLU and SLU operators, but that doesn’t work out well for non-technical reasons. A simple oscillator providing tone would be functionally equivalent for those who don’t need POTS, and should be cheaper, but should not be necessary either - it’s not a technical problem.

d.

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