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INIERNEI I VDICF I 'I Ft FVISION 1 I RIFRNET I aeon <br />VI. Packet Loss/ Frame Loss Ratio <br />c TIME VVARP <br />Busine <br />Packet Loss of Frame Loss Hatia is defined as the percentage of frames that am not surcessfully , ocoived ran lioarerl to the total (tortes that are sent in <br />I Colonial nondt, except whew an; packel or frame loss is thu result of an Excluded Disruption. The percentage calculation is hosed on frames that are <br />transmitter) from a Ioiovvak origination point and received at a network dosnnation point JTWC network hub to TNlC network huh) <br />Packet toss /Rome Loss Ratm is calculated as follows <br />Packet Loss / Frame Loss ( ° / °) = 100 I °( °j — Frames Received <br />VII. Jitter/ Frame Delay Variation <br />Jitter or Frame Delay Variation is defined as the variation In delay for two consecutive frames that are transmitted (one way) from a network origination <br />point and received at a nntwork riestinatirm point (TWC nenoork hub 10 TWC network bull) . TVW measures a sample set of frames every 5 minutes during <br />a calendar month, unless measurement is not possible as a result of an Excluded Otsnfp tion, and determines the average delay between consecutive <br />frames within each sample set The monthly Jitter / Frame Delay Variation is calculated as the average of all of the frame delay vaunted measurements <br />during such calendar month and is expressed in milliseconds (ms) . <br />Sum of the Frame Delay Variation measurements for an On -Not Service <br />Jitter / Frame Delay Variation = -- -- <br />Total # of rneasarements for an On -Net Service <br />VIII, Network Maintenance <br />Maintenance Notice: <br />Customer understands that from time to time TN /C will perform ntowfu k maintenance for network fmprovenoc,Is anti prevent ve trafn:enarri ;. In some <br />oases. TWC will need to perform urgent network maintenance, which will usually be conducted wi lhm the routine maintenance. windows. TWC witf use <br />reasonahle affo is to pravide anyance notice of the approximate time, duration, and reason for any argent maintenance outside the routine <br />mantenance windows. <br />Maintenance Windows: <br />Routine meinteuarrce me, he performed Mondey - Friday 12 midnight 3 a.m. l ocal Timo. <br />r <br />