Administrator’s Guide for W60P/W53P/W41P DECT Phones248Yealink IP phones support using FTP, TFTP, HTTP and HTTPS protocols to download configuration files or resourcefiles. You can use one of these protocols for provisioning.When provisioning your IP phone obtaining an IPv6 address, the provisioning server should support IPv6 and theformat of the access URL of the provisioning server can be “tftp://[IPv6 address or domain name]”. For example, if theprovisioning server address is “2001:250:1801::1”, the access URL of the provisioning server can be “tftp://[2001:250:1801::1]/”. For more information on provisioning, refer to Yealink_SIP_IP_Phones_Auto_Provisioning_Guide.Time and Date IssuesDisplay time and date incorrectlyCheck if the IP phone is configured to obtain the time and date from the NTP server automatically. If your phone isunable to access the NTP server, configure the time and date manually.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. A remote phonebook can be used by everyone that can access the server, while a local phone book can only be used on a specificphone. A remote phone book is always used as a central phone book for a company; each employee can load it toobtain 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 to adjust thevolume of the engaged audio device (speakerphone or headset) when there is an active call in progress.Get poor sound quality during a callIf you have poor sound quality/acoustics like intermittent voice, low volume, echo or other noises, the possible reasonscould be:l Users are seated too far out of recommended microphone range and sound faint, or are seated too close to sensitivemicrophones and cause echo.l Intermittent voice is mainly caused by packet loss, due to network congestion, and jitter, due to message recom-bination of transmission or receiving equipment (for example, timeout handling, retransmission mechanism, bufferunder run).l Noisy equipment, such as a computer or a fan, may cause voice interference. Turn off any noisy equipment.l Line issues can also cause this problem; disconnect the old line and redial the call to ensure another line mayprovide a better connection.There is no sound when the other party picks up the callIf the caller and receiver cannot hear anything - there is no sound at all when the other party picks up the call, the pos-sible reason could be: the phone cannot send the real-time transport protocol (RTP) streams, in which audio data istransmitted, to the connected call.Try to disable the 180 ring workaround feature.Related Topic
