Hello,

I have been using the KWS300 successfully for a long time now with version 
3.10. 

I upgraded the KWS300 firmware to address a problem with TCP invites.

This created another problem.  When the phone calls a trunk, the pbx sends a 
407.  The dect inserts a proxy authorization header in response.  When it comes 
time for the dect phone that called the trunk to re-register, it fails.  The 
proxy authorization header from the previous call is included in the 
registration along with the authorization header and the request is being 
ignored by the pbx.  If I don't call any trunks, the phone continues to 
register no problem.  I have to physically reboot the KWS300 to get it to 
register again.

Has anyone seen anything like this?  

Handsets are 5020 & 4040
Firmware versions starting from PCS05 all the way up to current.

Thanks,

Audrey
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