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For most people, it won't be a problem because your network router, switches, printers, and VOIP phones will be capable of handling 10/100 connections at best. But many servers, pc's and all Macs support 10/100/1000 (gigabit ethernet). So if you have a data-heavy work environment (graphic designers, video editors, etc.) then you could potentially be slowing down your computer's data transfer rates if you daisy-chain the computer off the VOIP phone. In these cases you may consider running a second line for the phone kept separate from your computer's gigabit connection to the router/switch/server.