Hi,We have recently changed a phone (CP 8821) and worked for few weeks. Then suddenly stooped because it could not turn on without connecting to the charger. we have also changed the battery but problem looks same. Active load was sip8821.11-0-3SR6-1...

Hi,We have about 70 APs with one WLC. About 4 SSID's configured with 2.4 and 5Ghz radios. Used to lose connection constently specially for guest network and corporate network  in only one area. Two Ap's are installed within 10m distance in a corridor...