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For 600 Mbps plans, uploads are 10 Mbps for 900 Mbps plans, uploads are 15 Mbps.
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If you have a Comcast Xfinity internet plan of 300 megabits per second or less, your upload speeds are a measly 5 Mbps. That’s because DOCSIS 3.1 has serious limitations, not the least of which is that upload speeds that are much slower than downloads.
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While the 3.1 standard can provide excellent bandwidth for common residential usage - web surfing, streaming video, teleconferencing, gaming, file downloads - it may be inadequate for what’s coming next. CableLabs has dubbed the technology 10G for its top speed of 10 Gbps, not to be confused with the wireless industry’s 5G, which stands for Fifth Generation. The standard is overseen by CableLabs, of which Comcast and other major cable providers are members. To put that in perspective, that’s 74 times the median download speed for fixed broadband service in the United States at 135.53 Mbps, according to the latest Speedtest Global Index survey from Ookla.ĭOCSIS stands for Data Over Cable Services Interface Specification, and the version in use by Comcast and most other cable companies is 3.1. In theory, it will allow for download and upload speeds of up to 10-Gbps. But late this year or early next, cable providers will begin to sell a much faster service thanks to a new cable-modem standard called DOCSIS 4.0. In Houston, Comcast’s mainstream residential service maxes out at 1.2-Gbps download speed.