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The Alliance for Telecommunications Industry Solutions, 04/01/2023
Publisher: ATIS
File Format: PDF
$103.00$207.20
Published:01/04/2023
File Size:1 file , 5.5 MB
This document specifies guidelines for the administration and assignment of Central Office (CO) Codes (NPA-NXX) and Thousands-Blocks (NPA-NXX-Xs) to Local Number Portability (LNP)-capable Service Provider (SPs) within geographic numbering plan areas (NPAs).
Reduced Reference Video Calibration Estimation Method
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Electrical Coordination of Primary and Secondary Surge Protection for Use in Telecommunications Circuits
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Availability - A Guide to Consistent Definitions
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Vertical Service Code Assignment Guidelines
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