Struggling with BLF

[Yealink Support]

Hi Kjcsb,
For such issue, we need the log for analyzing.
1. What's the Yealink model and firmware are you using now?
2. Could you provide PCAP trace, syslog(level 6) and config.bin file to us, so we can analyze?
Before you export the syslog, please set log level as 6, and reboot the phone, then click Start,and reproduce the issue, then click Stop,and export the trace, syslog, config,bin to us.
(About where to export these files, please refer to attached screenshot.)
These three files are very important for us, hope you can kindly understand.
4. Is it possible also to provide Cisco trace for us reference?
Thanks.