01-29-2020 12:07 PM
Hello, cisco 8821 wireless phone not registering with the CUCM.
When powering off and then bring it back it works (registering ) sometimes but not all times that kind of restarting helps.
When changing to connect another SSID and the connecting back former SSID it works.
ALL of these attempts not fixing the registering problem after 1 or 2 days or 1-2 hours it beeing unregister.
CUCM System version: 12.5.1.10000-22
Can anyone encounter this kind of problem?
Solved! Go to Solution.
02-05-2020 04:46 AM
After changing wifi ap from 2.4 GHz to 5ghz problem has been solved.
01-29-2020 01:08 PM
01-30-2020 02:25 AM
01-30-2020 03:13 AM
01-30-2020 03:43 AM
01-30-2020 04:59 AM
I am trying to look logs from 8821 but only it shows only logs when it was registered state. After losing registration it won`t show logs .
01-30-2020 01:21 PM
01-30-2020 10:20 PM
01-31-2020 12:24 AM - edited 01-31-2020 12:25 AM
OK, so the phone is still connected to WiFi when this issue occurs.
Have you checked the phone and CUCM logs and see if there are anything unusual?
What QoS is the SSID the phone is connected to?
02-02-2020 08:31 AM - edited 02-02-2020 08:32 AM
When the phone got an unregistered state I can`t log into the phone to saw logs.
we don`t use a wireless connection in our environment but only we bought an Ap for only cisco 8821.
So that Ap has a very basic setting not have a QoS setting.
02-05-2020 04:46 AM
After changing wifi ap from 2.4 GHz to 5ghz problem has been solved.
08-29-2023 03:02 AM
Same issue with sip8821.11-0-6SR5-5.
Configuring my basic AP like this : "Voice QoS", 5GHz, beacon 1, dtime 2, proxy ARP and removing 802.11k . It is much more better.
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