Invalid Line

[Aishion_Yealink]

(10-24-2017 01:12 PM)Jen Wrote:  Good afternoon,

We have 2 W52P's at our site. We frequently have the message 'invalid line' come up on the phone and we are unable to make or receive calls. A reboot of the router appears to resolve the problem but we need to determine why it is happening in the first place so we can stop it happening in future as it wastes a lot of our time.

Can you please advise?

many thanks

Hi Jen,

For this issue, could you please kindly help me confirm about firmware please(both base and handset)? Please kindly try with latest firmware in below link and test again.

   

Can I kindly know how often did you face this issue? Maybe 3 times a day? Do you mean 2 handset connect to one base?

It seems that phone are in "register fail" status when the issue happened, could you please help to check the register status on Web UI. And probably the port being used that caused this issue.

   

To locate this issue, would you please help me gather config.bin file, level 6 syslog and trace?

About how to get these files, please refer below FAQ:

http://support.yealink.com/faq/faqInfo?id=313

Note: Please remember export log to system before the issue happened for this probabilistic issue, you can also refer attached guide.

Any update, please feel free to let us know.