I am working in a school and we use the phones as a safeguarding tool, We cant be used as a guinea pig, need a permanent fix, No if's but's or maybe's, Need it to be a solid solution. .
To be honest I have install firmware 124.86.0.159 and still having the same issue,
if your T33G's are still under warranty return them and swap them for T42s.
Still experiencing the same issue on t33g , but left a call on for about 2 hours yesterday it happened twice locking up, usually it would do it more then that, doing the same test Monday on a T46S, I think we are heading in the right direction.
Got this but from yealkink,
Hi Sir
I recommend you update the T33G to the latest firmware version and test it again:https://fileonline.yealink.com/?ShareToken=7C184EE1D5C8327A793C3BCAE90EF4C3600FA28F
@Ibby-WaveLengths http://forum.yealink.com/forum/showthread.php?tid=47655&pid=75864&highlight=t33g#pid75864
Please will you submit a ticket also, really need this issue resolved,
I am also having the same issues but I just swapped my topology with new Aruba 6200m switches with om3 fibre and still having the same issue as I thought it was a lan related not the handset .
please could someone help the yeallink t33g go back to the same cisco switch as T54, but only T33g casuing that error, swapped everything cleaned switches traced switch no loop, but t33 keeps flagging stp is then blocking phone?
is this an phone issues