On 23/11/10 14:17, Bob Camp wrote:
Hi
Most telecom systems are still a "timing monoculture". All of their sources
of time are duplicates of the same thing. There are multiple categories of
trouble that will affect all of their sources. Redundancy with multiple
types of timing is what would make a more robust system. That's the stuff
you rarely if ever see.
I've seen it. It is being deployed by operators wanting a stable setup.
There are operators which has multiple clock sources at multiple sites
and planned redundant paths in hierarchial fashion to their complete core.
I have also seen that multiple GPS receivers is being deployed in the
network for significant geographical redundancy (over the size of the
network).
But I do agree that many is more or less clue-less about the issue, one
way or another. It is just that there is those which have deployed
fairly extensive redundancy in their network.
Cheers,
Magnus
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