Firmware: sip8821.11-0-4SR2-15 Finally, the problem was "tkip". It seems like this phones do not support TKIP encryption. So, I create a new ssid with WPA2 with AES and with this configuration I have no problem (later I follow the cisco deployment gu...

I finally tried converting my SSID (wpa/wpa2 - tkip- PSK) to OPEN for testing, and my 8821 caught signal and registrered with CUCM12.5. Then, the phone got updated firmware from TFTP. Later, I rollback the SSID settings and tried the 8821 again with ...

Hello, I´m having the same issue. My 8821 was in a box unopened for a year or so, waiting for a migration of CUCM from 8 to 12.5.Now, I want to connect 8821 to my wifi networks (7925 working fine actually) but I cannot connect 8821 using PSK with tki...