Hi guys.I'm seeing some problems to transfer external calls after I received them. I press the transfer button, I can digit the destination number, but when I try transfer (pressing the transfer button again) return the message "reach maximum calls"....

Hi . We are getting some problems with VOIP call between IP phone 7821 to specifics numbers. When we change the device (from 7821 to IP Communicator for example) everything works fine.Can you help us to understanding what's going on?