Your issue sounds similar to this one: https://community.cisco.com/t5/ip-telephony-and-phones/cisco-...

That's strange, what you're describing is the classic "Electronic Hookswitch Control" issue but you ...

There's a number of unknown variables here to be able to offer a lot of help. Getting the logs and i...

Could you paste your jabber-config.xml file please. Also note that I have found that Jabber doesn't ...

How far are the clients from the access points? I'm curious about the signal power issue you mention...

The Network Busy issue is a known defect on the 8821 handset. TAC told me to disable ACM on the WLC ...

Highly recommend updating to firmware 11.0.3 at a minimum. I'm on 11.0.3ES1 currently due to a long-...

You seem to be denying your Gi0/1 interface's subnet (192.168.200.0/24) from being NAT'ed to the Int...

Good find. It's not something I have come across but i've been working with Cisco for almost 3 weeks...

No I haven't had this issue myself. If you are running firmware prior to 11.0(3) then the phone will...

What is the source and destination addresses you are using? I'm just trying to understand your inter...

So looks like it's constantly failing to send (tx) packets and drops into standalone mode. Is this t...