Hello, we have a T28P with three EXP38 attached.
Each time the phone is rebooted for any reason, EXP38s require
AT LEAST HALF HOUR to get fully and stable functionality.
After the reboot, some lights on the EXPs do turn on, and other off... and change their state (I'm not telling about switching between green and red as usual, I really mean ON and OFF). E.g. after five minutes you have all lights turned on, and after ten minutes you have a third of them off again, with no clear reason.
Trying to fix this problem (and other minor problems with the phone), today I updated T28 software from V60.x to V71 (2.71.0.165).
But this has not fixed the issue, maybe it's even worse now. E.g. some minutes after the reboot, calling an internal number (from the phone itself) sometimes may take many seconds, instead of just the couple of seconds it takes normally... some calls seem to "hang up" automatically with no apparent reason, etc. In short, the phone seems to be LESS stable than before. And EXP38s are still working strangely after half hour. Maybe after the EXPs will have become "stable", all the phone may become more stable... but how long can this require?
Any idea?
I'm going to send you an email with the systemlog .tar file...
Another thing: how to know if EXP38 requires a firmware update?
All our three EXP38 have hardware version 16.0.0.0 and firmware version 3.17.0.0.
Your EXP38 support page
http://www.yealink.com/SupportDownloadfi...4&flag=142
does not expressly mention a firmware version, but links a .zip file with instruction for updating them by using an apposite T28 firmware (in short: flash T28 with an apposite modified firmware, then connect EXP38 to it -ONE AT A TIME!- to flash EXP38, then flash T28 again with a standard firmware. Not comfortable at all.)... that does
not mention which one will be the resulting EXP38 firmware version (do I need it or not?), and how may do it someone who is using a T26 instead of a T28.
