Having had various scenarios where an existing configuration of the phone system cannot be overwritten or reconfigured. I found a simple solution to restore to factory settings and could reconfigure the telephone system and assign the right IP Address etc. to the phone.
Here are the very basic steps to have this done and this is applicable to the 3XX series. Press in the following order as shown below.
“*”, “Volume UP”, “*”, “Volume DOWN”, and then “#.”
If executed correctly, it will reboot and reset the telephone system.
Jitsi is a Secure and Simple Video Conferencing and Instant Messaging application that can be run on Windows, Linux, Mac and Android. Most importantly
This is a standalone application that supports instant messaging and telephony protocols (OTR and SIP etc.).
How to Install – Down the installer from this site https://jitsi.org/downloads/ Since our area of concentration is on Windows PC simply download the MSI from this link https://download.jitsi.org/jitsi/msi/ – Download the latest version of jitsi-latest-x64.msi (2017 installer) – Run the Installer
– Click on next and accept the license
Click through the setup and additionally check “Auto start when the computer restarts or reboots and continue with the installation process by clicking on next
Finally click on Install as shown below
Click on finish
This will prompt the windows security Alert window as shown below, (Simply allow the Firewall Access)
Step 2:Configuring Jitsi
– Close every other Open Window except this below
Click on Tools and Select Option Now lets configure Jitsi to work with our telephone system