Yealink SIP-T2 Series Administrator's Manual page 22

Administrator's Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
The IP phone does not get an IP address
Solving the IP conflict problem
Specific format in configuring IPv6 on Yealink IP phones
Time and Date Issues
Display time and date incorrectly
Display Issues
The phone screen is blank
The phone displays "No Service"
Phone Book Issues
Difference between a remote phone book and a local phone book
Audio Issues
Increasing or decreasing the volume
Get poor sound quality during a call
There is no sound when the other party picks up the call
Play the local ringback tone instead of media when placing a long distance number without plus 0
Wi-Fi and Bluetooth Issues
The wireless signal strength is low
The phone cannot connect to Bluetooth devices all the time
The Bluetooth headset affects IP phone's voice quality
Firmware and Upgrading Issues
Fail to upgrade the phone firmware
Verifying the firmware version
The IP phone does not update the configurations
System Log Issues
Fail to export the system log to a provisioning server (FTP/TFTP server)
Fail to export the system log to a syslog server
Password Issues
Restore the administrator password
The web screen displays "Default password is in use. Please change!"
Logo Issues
Why does the IP phone use DOB format logo file instead of popular BMP, JPG and so on?
Power and Startup Issues
Both PoE cable and power adapter is connected to the phone
The IP phone has no power
The Phone screen is black
The IP phone always display the Yealink logo
Other Issues
The difference among user name, register name and display name
On code and off code
The difference between RFC 2543 Hold enabled and disabled
The difference between Shared Call Appearance (SCA) and Bridge Lines Appearance (BLA)
Appendix
RFC and Internet Draft Support
Reading Icons
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