Agenda - 10-21-1986 - Laserfiche WebLink

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" . .W. ----- -- • • ___________ _____ • ________ , .. - • _.._ .. .---- - • 1 , .. 4 , . - Attached are diagrams of the long distance network delign today and nn plaed for 1937 - included is information about the components of the network, the programs, systems, and t_ohnical centers utiliz . by AT&T to monitor and manage y• the quality and reliability of the network; and escalation guiCelinas for correcting 2STP problems were given to the Technical Task Force. This information addresses network structure, management, and pnrformanea. - AT&T contracts with Gsnral Telephone of thz .South (GTS) whereby GTS provides interi, TA switching to AT&T through toll center at rnlrhn - CTS is responsible for the planning, engineing, xu:-intnnnen, Lnd mace :-: n-rn .Jary for providing and onrating senviceL; and facilities provided to AT&T. AT&T contracts for guaranteed switching capacity mPam2red by equivalent voice circuit terminations required to provide for the intorLATA demand. Each party is responsible for raintaining tIlat portio-;-i of the into.rtoll massage trunk and switching ecuipmcInt which it provides. The cc vary operating the office which first recognize'.7, a . trunk failure is responsibl for isolating, reliring, and/or referring the trouble as approoriate. • GTS nay institute network controls to eliminate network con ,ntnn. . caused by failure or malfunction of AT&T facilities an aust notify AT&T immediately of such action. In the case cn' the interLATA network failure in April, the AT&T STPs "tol '' the Durham switch to stop handling signaling traffic on both sets of "A" links . While this was not a network coninnol instituted by GTS, there was immediate communication between the. Companies. - Back--up plans and emergency plans to ensure reliable, continuous service are requirements of the design and evolution of the network. The diagrams of the currant network design (attached) provide a graphic presentation of the diversity in the network through both CCS and multifreguency trunking. The CCS Network is supported by the it2SCCS Support System and the following support centers: RWC (Remote Work Center) , NESAC. (National • Electronic Switching Assistance Center) , Bell Labs, and CNAC' (CCS Network Advainistrtion Center) . . - Redundancy and diversity are network design requirements. The AT&T CCS Network has rc7fIndancy throughout the country. The CCS Network is dividd into regions with two 2STP5 each. • The 2STPs within a region are mate offices, each with internal backup capabity (i.e. , duplicate processors) , in case of a total machine failure. Each 2STP is connected to its regional mate 2STP and all other 2STPs. via one or more • layers of diverse Signal Links (SLK) . Depending on the • • ' volume of long distance traffic, the. switch office is able to increase the signal link capacity and/or build additional links to meet its switching needs. In addition, the Atlanta and Birmingham 2STPs each have one signal. link to the Durham switch office. Each signal link has two diverse facilities, for a -total of four diverse routes to the Durham office. - 14 -