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555 Line Numbers - 1 David H. Bench – Nortel Networks CENTRAL OFFICE CODE 555 Author:David Bench, NCE Company:Nortel Networks Date:July 17, 2001 Contact:919.

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Presentation on theme: "555 Line Numbers - 1 David H. Bench – Nortel Networks CENTRAL OFFICE CODE 555 Author:David Bench, NCE Company:Nortel Networks Date:July 17, 2001 Contact:919."— Presentation transcript:

1 555 Line Numbers - 1 David H. Bench – Nortel Networks CENTRAL OFFICE CODE 555 Author:David Bench, NCE Company:Nortel Networks Date:July 17, 2001 Contact:919 991-7362 dbench@nortelnetworks.com Author:David Bench, NCE Company:Nortel Networks Date:July 17, 2001 Contact:919 991-7362 dbench@nortelnetworks.com Past participant of the ATIS/ICCF Past Moderator of the ATIS/ NIIF

2 555 Line Numbers - 2 David H. Bench – Nortel Networks Created by AT&T Network Planning Purpose for completion of Directory Assistance Used in US and Canada All US and Canadian Area Codes have 555 working - Code 555 assigned to Area Code DA Center - Area Code plus 555 has a defined CLLI, Rate Center & Wire Center Area Code plus 555 completes to DA - Trunk Side Access & DA Billing PURPOSE OF 555? No line side connections

3 555 Line Numbers - 3 David H. Bench – Nortel Networks OTHER USES OF 555 NUMBERS InterLATA Carrier check number: 1+700 555-4141 - 700 takes caller to IXC network Local Service Provider check number: 555-0055 - Cant be made to work Given to the Entertainment Industry for use in movies and television. (555-0100 – 555-0199) No other CO code has line numbers assigned by NANPA

4 555 Line Numbers - 4 David H. Bench – Nortel Networks Opening of the 555 numbering resource (Line Numbers) ICCF Issue in 1994 - by Telco Planning Number Assignment Guidelines developed 1996 - NANPA began assignment in 1996 Interconnection arrangements developed 1996 - Needs Technical Requirements & Development Area Code + 555 Cannot Complete to Multiple SPs INDUSTRY ISSUE ON 555

5 555 Line Numbers - 5 David H. Bench – Nortel Networks WHAT WENT WRONG? Classic case of the cart before the horse syndrome. Assignment guidelines and number assignment occurred before the technology was put into place. Holders of 555 Code would need to fund switch development.

6 555 Line Numbers - 6 David H. Bench – Nortel Networks Local Number Portability - Not universally deployed - Only deployed in certain Rate Centers - No geographic portability Advanced Intelligent Network (AIN) - Not universally deployed - Data base routing number would use another numbering resource. TECHNOLOGY CHANGES SINCE 1996

7 555 Line Numbers - 7 David H. Bench – Nortel Networks HOW CAN THE INDUSTRY MAKE IT WORK? It is technically possible to make it work Who develops the technical specifications? Who develops switch technology? Who pays for deployment of the capability? 555 Line Number advocates want someone else to pay the bills.


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