Orange County NC Website
Browse       Search
1 _ <br /> 1 <br /> economics, etc. Durham may remain a System 6 software <br /> location without affecting any service currently available. <br /> AT&T could not convert back to System 6 software because <br /> that system had been replaced by the• installation of 2STP . <br /> computer hardware and System 7 software. <br /> - System 7 software -; s not being "debugged" on line. The <br /> software was tw and debugged in its development <br /> process. AT&T waz; ins Calling and testing. high capacity <br /> circuits (4!fl links) between 2STP: that used System 7 <br /> software which, when c o mb _ e 1 with the i comp<... vil) .e software <br /> protocol int.f._fric': and l-h..- ...c!.ib• •-ter' _ Cdr `.!.'.'_eci. .: .. ..�:... _ -� ti.. <br /> Durham switch to the CCS network, resulted in th:: tpril <br /> network failure. - <br /> - There were only two types of breakdowns in AT&T's network, <br /> one software and the other hardwar e, both of which have not <br /> occurred since they were: corrected on. April 21. The network <br /> failures during the week of April 6 through April 13 , and on <br /> April 21, affected Hillsborough and twelve,: other offices - <br /> whose interL?TA calls were connected to AT&T ' s network <br /> through the Durham office. Calls originating from cities in <br /> other Lr TAs (e.g. , Charlotte or Rocky Mount) to these <br /> thirteen offices would not have been .co 7 leted. Calls <br /> between Charlotte and Rocky Mount were not affected by this <br /> network problem. Cooperation, communication, and <br /> coordinated action between AT&T, General, and Centel existed <br /> at all times through the identification and correction of <br /> the network failure. - <br /> -- During the period of trouble, alternative options and fixes <br /> were investigated. Action was taken• to reduce service <br /> • interruption while trying to isolate the problem. General <br /> Telephone and AT&T converted 720 CCS trunks to Multi- <br /> . Frequency (MF) type signaling. The MF trunks are not <br /> affected by CCS troubles. It was decided to leave these - <br /> trunks as MF to provide additional network diversity and - <br /> redundancy. <br /> . -- The design of the network changed, again in July and will <br /> change again in June of 1987 as part of our e fort4 to . <br /> provide quality, reliable service. Diagrams of the current <br /> and future network configurations are included in the next <br /> section of this report. AT&T is willing to work with the <br /> Local Telephone Companies to evaluate any 'additional net.c•york • <br /> configurations that will improve service to its customers. <br /> -- As a result of the August 13 meeting between AT&T and the <br /> Orange County Technical Task Force, AT&T is studying the <br /> feasibility of providing additional facility diversity from <br /> Greensboro to Durham. The conclusion of this study will be <br /> shared with the orange County Technical Task Force. <br /> - 9 - <br />