Configuring Advanced Features255Parameters Permitted Values DefaultNonedialplan.emergency.X.server_priority(X ranges from 1 to 255)a combination ofdigits 1, 2 and 3 1, 2, 3Description:Configures the priority for the emergency servers to be used.The digits are separated by commas. The servers to be used in the order listed (left to right).The IP phone tries to send the INVITE request to the emergency server with higher priority. Ifthe emergency server with higher priority does not respond correctly to the INVITE, then thephone tries to make the call using the emergency server with lower priority, and so forth.The IP phone tries to send the INVITE request to each emergency server for three times.Example:dialplan.emergency.1.server_priority = 2, 1, 3It means the IP phone sends the INVITE request to the emergency server 2 first. If theemergency server 2 does not respond correctly to the INVITE, then tries to make the callusing the emergency server 1. If the emergency server 1 does not respond correctly to theINVITE, then tries to make the call using the emergency server 3. The IP phone tries to sendthe INVITE request to each emergency server for three times.Note: If the IP address of the emergency server with higher priority has not been configured,the emergency server with lower priority will be used. If the account is registeredsuccessfully or failed (the account information has been configured), the emergency calls willbe dialed using the following priority: SIP server>emergency server; if the account is notregistered, the emergency server will be used.Web User Interface:NonePhone User Interface:NoneHotlineHotline, sometimes referred to as hot dialing, is a point-to-point communication link in which acall is automatically directed to the preset hotline number. The IP phone automatically dials outthe hotline number using the first available line after a specified time interval when you lift thehandset, press the Speakerphone key or tap the line key. IP phones only support one hotlinenumber.
