Troubleshooting579Display IssuesThe phone LCD screen blankDo one of the following: Ensure that the IP phone is properly plugged into a functional AC outlet. Ensure that the IP phone is plugged into a socket controlled by a switch that is on. If the IP phone is plugged into a power strip, try plugging it directly into a wall outlet. If your phone is PoE powered, ensure that you are using a PoE-compliant switch or hub.The phone displays “No Service”The LCD screen prompts “No Service” message when there is no available SIP account on the IP phone.Do one of the following: Ensure that an account is actively registered on the IP phone at the pathMenu->Status->More->Accounts. Ensure that the SIP account parameters have been configured correctly.Phone Book IssuesDifference between a remote phone book and a local phone bookA remote phone book is placed on a server, while a local phone book is placed on the IP phone flash. Aremote phone book can be used by everyone that can access the server, while a local phone book canonly be used on a specific phone. A remote phone book is always used as a central phone book for acompany; each employee can load it to obtain the real-time data from the same server.Audio IssuesIncreasing or decreasing the volumePress the volume key to increase or decrease the ringer volume when the IP phone is idle or ringing, or toadjust the volume of engaged audio device (handset, speakerphone or headset) when there is an activecall in progress.Get poor sound quality during a callIf you have poor sound quality/acoustics like intermittent voice, low volume, echo or other noises, thepossible reasons could be: Users are seated too far out of recommended microphone range and sound faint, or are seated tooclose to sensitive microphones and cause echo.
