Having a Prologic installed with ISDN-PRI T1 service from Verizon. This will be used like a Flex-path for my DID as well as outgoing. The question asked by Verizon is do I want Custon or National? I know this was talked about here on Tek-Tips before, but I can't for the life of me remember the answer.
Can anyone remember, or know the answer?
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