Chapter Summary
The following list summarizes the key points that were discussed in this chapter:
■ CUCM supports SIP, SCCP, and H.323 protocols for endpoints.
■ Feature differences exist between SIP, SCCP, and H.323 endpoints and between different IP phone models.
■ Cisco IP Phones follow a process during the boot cycle. The Cisco IP Phone learns its voice VLAN ID and IP configuration, and a configuration is downloaded from the TFTP server.
■ Third-party H.323 phones are configured on both CUCM and in the phone-configuration interface.
■ Third-party SIP phones register by their directory number and a username, provided by digest authentication.
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