Voice-over-IP (VoIP) refers to the ability to make voice telephone calls over the Internet. This differs from
traditional phone calls that use the Public Switched Telephone Network (PSTN). VoIP calls use an Inter-
net protocol, Session Initiation Protocol (SIP), to transmit sound over a network or the Internet in the
form of data packets. Certain Motorola Netopia
Gateway models have two separate voice ports for
connecting telephone handsets. These models support VoIP. If your Gateway is a VoIP model, you can
conﬁgure the VoIP features.
link, the VoIP SIP Lines page appears.
When you click the
To enable a VoIP line, select one of the lines from the SIP Line Entry menu that corresponds to the port
on the Gateway to which your phone is connected.
button. In the resulting screen, check the Enable SIP checkbox.
The screen expands to display the features that you can enable for that line.