T48 Registration Failed &Headset Audio

[Yealink_Michael]

hi

please reset to factory after you upgrade to 35.80.0.70

for question one , please provide us the trace file for future analysis,trace file including pcap file, config bin and syslog file , and we need three of them provide at one time.

for how to get them , please refer to the FAQ below:
http://forum.yealink.com/forum/showthread.php?tid=1319

we need trace file both on the old and new firmware , totally 6 files, you can send trace file to support@yealink.com we will follow up .

for question 2, which headset you are use, please tell me the detailed model , reset to factory and test again , if issue still exist , also provide trace file to us , 3 files in total

TKS & BR