How to select the network scenario for IP phones
80eSpace 7900 series IP phones support three network modes: UC1.1, UC2.0, and others.
eSpace 8850 supports only UC1.1 and UC2.0 network modes.
In UC1.1 mode, IP phones are connected to the U1900 gateway, and the SIP server address is set to the IP address of the U1900 gateway. UC2.0 mode matches the UC2.0 solution where the registration address is set to the IP address of the AA server. When the Others option is selected as the network mode, IP phones interwork with third-party softswitches.