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Recent Network Management News:

Updated Rules Regarding the Attachment of Devices to the Network

On May 20, 2011, we first posted about these rules. Those rules have now been updated to reflect that IPv6 is now required, that DOCSIS 1.1 and 2.0 modems are now or soon will be in end-of-life status, and that we are preparing for DOCSIS 3.1 modems. 

These rules pertain to the attachment of devices to our High-Speed Internet network by customers. You can find information concerning the devices approved for use on the network, and the tiers of our service that they are appropriate for at In order for a cable modem device to be approved for use on the network, it must pass CableLabs certification, UL certification, FCC certification, and Comcast DOCSIS certification testing. Comcast's current DOCSIS device testing requirements and the test scheduling process are described here.

Please also note that customers may purchase their own cable modem for use on the Comcast network. However, Comcast does not support all possible modems on its network because there may be compatibility issues with some devices.  The Comcast Agreement for Residential Services (Sections 6(b)(1)–(3)) makes clear that a device must meet Comcast’s minimum technical specifications in order to successfully install, access, operate or use a particular service. In addition to our full list of approved devices, a list of recommended retail devices can be found at 


Additional information