Troubleshooting145TroubleshootingThis chapter provides general troubleshooting information to help you solve the problems youmight encounter when using your CP920 IP conference phone.If you require additional information or assistance with your new phone, contact your systemadministrator.General IssuesHow do I find the basic information of the IP phone?Tap the OK key when the IP phone is idle to check the basic information of the IP phone, suchas IP address and firmware version. For more basic information, refer to Phone Statuson page 15.How to obtain the MAC address of a phone when the phone is not powered on?Three ways to obtain the MAC address of a phone: You can ask your supplier for the shipping information sheet which includes MACaddresses according to the corresponding PO (Purchase Order). You can find the MAC address on the label of the carton box. You can also find the MAC address from the phone’s bar code on the back of the phone.What is the difference between user name, register name and display name?Both user name and register name are defined by the server. A user name is used to identifythe account, while a register name matched with a password is used for authentication if theserver requires. Display name is the caller ID that will be displayed on the callee’s LCD screen.Server configuration may override the local configuration.Display IssuesWhy is the LCD screen blank? Ensure that the phone is properly plugged into a functional AC outlet. Ensure that the phone is plugged into a socket controlled by a switch that is on. If the phone is plugged into a power strip, try to plug it directly into a wall outlet instead. If your CP920 IP conference phone is powered from PoE, ensure that you use a PoE-compliant switch or hub.
