Telephone Number (TN)

A Telephone Number (TN) is historically associated with a copper path or circuit, today we tend to use this term synonymously with DID. We use DID's instead of telephone numbers as we can virtually assign them to a Call Path instead of tying them to specific physical infrastructure to allow functionality such as using the same TN for all outbound calls at a business. 

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Firm Order Confirmation (FOC)

This is the date provided by the losing carrier during a number port that the phone provider will...

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This is the carrier or service provider which is losing a telephone number(s) during a port request.

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