Avaya Vantage k175 certificate issues

[poclano]

The problem is the following: When we try to achieve the SIP user shows us the following error

"There is a problem with the security certificate requiered for VoIP phone service"

I do not know what certificate I need, you can help me please.

i have all certificates installed on http server

i have setting ntp server and already ther is problem the date and time is not working correctly

 

[jenalolo]

Set the time and date first then try to login.