The original name of the new standard hints at one of the key differences between the 3.1 and 4.0 versionsĮvery prior version of DOCSIS has had asymmetrical upload and download, a limitation imposed by the separate upload/download channel scheme. The next iteration of DOCSIS is 4.0, previously called DOCSIS 3.1 Full Duplex was announced in 2017, and research, development, and deployment have been underway since. The DOCSIS progression doesn’t end at DOCSIS 3.1. RELATED: What Is DOCSIS, and Why Does It Matter When Modem Shopping? DOCSIS 4.0 vs. DOCSIS 3.1 modems are only required for cable internet subscribers with internet packages near or above gigabit speeds, though DOCSIS 3.0 modems are slowly being phased out. DOCSIS 3.1 has a theoretical maximum speed of 10 Gbps down and 1.5 Gbps up. Further, it brought changes to the channel width, numerous optimizations, and as a result, support for gigabit and multi-gigabit internet. DOCSIS 3.1, introduced in 2013, made the minimum default configuration 32×8 channels.
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