The cucm version is 8.6.2 Business Edition. The phone load is SIP9.1.1SR3.
This phone load is currently prefered because the Admin Vlan change functions correctly. The phones are consists to Zyxel switches.
With the later phone loads the Admin Vlan can be set, but the Opperational Vlan then stays the same as the PC Vlan, then the phones are in the incorrect vlan. I have tested all later releases including the SIP184.108.40.206.
Internal and External calls have the same issue, when taking an incoming call offhook there is a delay of the audio and the first couple of words the caller says is not heard. The same Problem is experienced when the speaker is used.
The customer has a total of just over a 100 Cisco 6921 and 6941 devices.
There is only one other Cisco IP Phone device deployed, a Cisco 8961.
On this device the problem is not experienced.
Switch port settings are standardized and the same configuration is implimented for the Cisco 8961 device and the Cisco 69xx phones.
Any similar experience or is this known, I could not find information about such an issue...
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