Now, with the introduction out of the way, let’s begin.The first component of the system will obviously be the Asterisk IP PBX server.For the sake of this guide I’m going to assume that this has been installed on a server with default settings.If assistance is required in getting an Asterisk server setup or configured with defaults, please consult one of the several sites on Asterisk assistance.I am unable to do a “Conference” over the Cisco 7942 ie Joining 2 calls.I make a call, press conf, this places the call on hold I dial another call, the other party answers. Can you confirm if its working with the above load? This is one that stumped the heck out of me until I found someone else griping about the same. Symptom: Asterisk sip set debug [ip-of-phone] will report e.g.here is how I got my Cisco IP Phone 7942 provisioned with Asterisk.
This is because the default is US ( i dont know why cisco dont want to share the other jars for customization, if you need it you need to have a contract or sort of ). I have also faced same kind of issue which Akhil faced.The system that was used for the making of this guide is a turn-key installation package as distributed by Asterisk NOW.The Asterisk NOW install is a complete installation package available for free that runs off of the Cent OS Linux distribution.This specific problem has to do with the codec which is used.Change the codec to for example: g722 and make sure that this codec is enabled in Asterisk as well. Hello, I am struggling since few days with the Error “ Protocol Application Invalid” on my Cisco 7940, just bought on the web . : C:\Users\%User Name%\App Data\Local\Temp\Disk1\ISTeleport\Russian_Russian_Federation\PROGRA~1\Cisco\TFTPPath, ( Russian_Russian_Federation) TFTP, .