TAILIEUCHUNG - Maintaining Service Continuity

A universal truth in network design is that all active equipment will require upgrades and replacement. Software patches can be required as soon as 30 days after installation. Upgrades to an existing platform, changes often required to maintain vendor support, will certainly follow over the years. Complete replacement due to new technologies or discontinued support can occur within 10 years of commissioning. | white paper A universal truth in network design is that all active equipment will require upgrades and replacement. Software patches can be required as soon as 30 days after installation. Upgrades to an existing platform changes often required to maintain vendor support will certainly follow over the years. Complete replacement due to new technologies or discontinued support can occur within 10 years of commissioning. Every project for active equipment includes a detailed installation plan. Yet given the certainty of replacement for all active equipment and given the prospects for service disruption in a forklift upgrade an exit plan for active equipment is just as important as the installation plan. The latest example illustrating the importance of planning for the entire life cycle of active equipment is seen with digital cross-connect systems or DCS. Due to manufacturer discontinued DCS and new DCS platforms required to support advanced network capabilities service providers face wholesale replacement of DCS equipment. Video OC-N Fiber Distribution Frame 3 3 DCS 3 1 DCS I 3 1 0 DCS 3 1 0 DCS 1 0 DCS 1 0 DCS Digital Distribution Frame Twisted Pair ATM Data Services ASYNC FAA SONET DS3 edical Sevice ISDN B-ISDN Government Services Collocation 911 Emergency Internet Services Services Switched a J s g g J g J g 3 3 OC-192 OC-48 OC-12 OC-3 GB GB 560 MB 180 MB 90 MB 45 MB M13 Digital Distribution Frame Coaxial Migrating Hard-Wired DCS Will Disrupt Service Considering that a single DCS grooms and intertwines thousands of circuits DCS replacement is not a trivial undertaking. Embedded in each DS3 are 28 DS1 circuits. In turn each DS1 carries 24 DS0 circuits. This equates to 672 sub-channels on one DS3 - each of which may be destined for a different path in the network through the DCS matrix. Some current DCS models claim to handle up to 2 048 DS3s in the matrix. This can mean over million DSO-equivalent circuits intertwined in one DCS. Fortunately for .

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