Patent ID: 9419862
Filing Date: 2016-08-16
CPC Classification: H04B,H04L

Claim Text:
1. A method for verifying a hybrid fiber-coaxial (“HFC”) topology map of a Cable Modem Termination System (“CMTS”) comprising a plurality of cable modems, the method comprising: evaluating the HFC topology map to identify frequencies associated with a selected one of the cable modems, wherein the HFC topology map is stored in a storage device of the CMTS; communicating a dynamic channel change request to the cable modem for each of the associated frequencies; receiving a response message from the cable modem for each of the channel change requests; and when any one of the response messages indicates a failed attempt by the cable modem to change to a requested channel, taking an action comprising one of sending an alert to an administrator, logging a possible topology error, and taking the cable modem off-line.