Using IP and SIP telephones, you can gain access to the features of Communication Manager from multiple locations. Mobility is a major benefit of IP and SIP telephones. For example, you can move the telephones by plugging the telephones anywhere in the network. Similarly, another benefit of mobility in IP softphones is that after you install the softphones on a laptop computer, you can connect these softphones to Communication Manager from any remote location. Users can place calls and handle multiple calls on their computers.

IP telephones support the following features: Time-To-Service (TTS) capability, gratuitous ARP reply, and acceptance of incoming TCP connection from an active server.

See Telephones, endpoints, video devices, and software client for the list of supported endpoints.

For more information on the supported features, refer to Communication Manager feature description guide and the respective endpoints overview guide.