We have the issue on 6 units of SPA525G,experiencing the issues with the phones locking up during a call. The display is still lit and call appears to be active (timer) but the call is disconnected and then do dial tone. The only way to get the phones back up is to reboot them.
setting of the system
a. Firmware on phones:
b. Phones are connected to UC520(UC520W-8U-4FXO-K9) and Cisco SG300-28P POE switches.
c. System image file is UC500 Software (UC500-ADVIPSERVICESK9-M), Version 15.1(2)T2, RELEASE SOFTWARE (fc1)
Kindly advice any workaround on this case, appreciate on it.
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