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Originally posted by JBean3329:
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but we'll probably never know why it could only be called within the CO.
We usually have the reverse problem when we port a number away from the local LEC- they 'forget' to remove the number from their switch programming, and after the number ports, their equipment sees it as a disconnected/NLIS number so anyone on that switch can't make a call to that number. I'll bet VZ had their ducks in a row on this port, so anyone on the same switch could call the number, but the outside world was still under the sway of the forwarded number.
Yup, intra-switch calls didn’t have to hit the SS7 network to get mussed up in the confusion. It just connected port –to-port within itself.

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Bryan
LEC Provisioning Engineer
Cars -n- Guitars Racin' (retired racer Oct.'07)