Open Zoiper -> Go to Settings -> Accounts -> (your account) Double check that the setting for 'Host'is correct and does not contain any spaces. • There's an issue with your internet connectivity Please open your browser and check if you can visit a random website. If not, you have to fix your internet connectivity issue(s) first. If you are using a jailbroken iOS iPhone or iPad, please Disable any firewalls you might have installed. • A NAT router in between the softphone and the server is causing some packets to be dropped Zoiper has a few settings to trick the server into sending the packets to a different IP address or port. Please try different settings combinations of STUN (enabled or disabled) or rport for signalling (enabled or disabled). STUN ON - Rport OFF STUN ON - Rport ON STUN OFF - Rport OFF STUN OFF - Rport ON Please note that: A combination that works on one WiFi access point or 3G/4G network might not work on another.

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A combination that works one WiFi or cellular network for a specific VoIP server might not work for another one. If the above fails, please contact your provider or PBX administrator might be able to tweak a server side setting to make things work. • The PBX or SIP Provider you are trying to connect to is currently down. Please contact your provider for further assistance; • Your PBX is on an internal network, but Zoiper is not on the same network and no VPN is running.

Please make sure Zoiper and the PBX or on the same network or setup a VPN between the device running Zoiper and your PBX. Please consult with your system administrator for additional help.

Quick Start Installation instructions • After the download prompt appears, save the file and wait for it download successfully. • • • Next go to your downloads directory and find the Zoiper installer, then execute it. • A verification prompt will appear, click 'Yes'. • The Zoiper installer will start, click 'Next' on the first screen of the Setup wizard. • Read the license agreement and click 'Next' after accepting the agreement. • Select which components to be included.

• Select the version you would want to install. • Select an installation directory (Best to keep the default one). • Choose a start menu folder. • Select which users should be able to use the new Zoiper installation. • The setup is now ready to begin the installation. Click 'Next' to continue. • Wait while the Zoiper installation finishes.

• The install wizard will inform you for the Zoiper Biz Plugins which should be already installed. • The installation is complete. Click 'Finish' to launch Zoiper. Activating the Zoiper License: (Zoiper Business Edition Only) If you are using Zoiper Business Edition, an activation screen will appear on the first startup. Please fill in the email address you used to purchase Zoiper as the 'username field'. You can find the password in the mail that was sent to you directly after your purchase.

Activate online If your computer is connected to the Internet, you can activate your copy of Zoiper automatically by clicking on the Activate online button. Zoiper will contact our licensing server and download the needed license files.

If your computer requires the use of a manually configured proxy server, zoiper will automatically use the proxy settings used for internet explorer. Activate offline If your computer is not connected to the Internet or a firewall is blocking access to our licensing server, the “Activate offline” - button can be used. Clicking on the button will generate a file that contains some details that are unique for your computer and the version of Zoiper that you are trying to register. The filename contains the name of your computer.

It will look like this: ZoiperCOMPUTERNAME.certificate It can be found in the Zoiper Certificates folder. You can find it in: C: ProgramData Zoiper Zoiper.certificate is the file that should be sent to register4@shop.zoiper.com Please open your mail client and press the 'Compose new mail' button. Address the new mail to register4@shop.zoiper.com and attach the ZoiperCOMPUTERNAME.certificate file. You will receive a certificate file by mail in return. Please make sure that you are saving it named: certificate No file extension is needed.