I recently installed 3cx. The soft phones seem to be working well. I got an Aastra 57i. i entered the MAC address and other info into the Provisioning tab of the Extensions section in 3cx. I followed the instructions for setting up a 57i with 3cx. The phone still does not operate. I looked and saw that it had old firmware. I can't get this firmware to update. How can I update it manuall? it doesn't seem to pull any new firmware from the 3cx server. Thanks.