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How do I configure the Voice over IP (VoIP) Telephony ports on my uBR900 cable modem?

April 26, 2017Cable modem configure ports Telephony ubr900 voice over ip voip

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How do I configure the Voice over IP (VoIP) Telephony ports on my uBR900 cable modem?

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A. First, it is important to note that VoIP on cable modems only works properly in a cable network if the service provider has set up the system to support it. For this reason, your service provider normally takes responsibility for setting up VoIP on your uBR900 cable modem. Secondly, the configuration of VoIP on a uBR900 cable modem is fundamentally the same as VoIP configuration on any other Cisco IOS Software-based router platform. This means that the documentation on cisco.com regarding voice configuration on Cisco routers also applies to uBR900 cable modems. Third, only the uBR924, uBR925, and the CVA120 cable modem series support VoIP. Note: The uBR904 and uBR905 cable modems do not have voice ports. If you need to configure VoIP yourself, then the first reference to use is the uBR924 Software Configuration Guide.