![]() Please consult with your system administrator for additional help. Please make sure Zoiper and the PBX or on the same network or setup a VPN between the device running Zoiper and your PBX. Your PBX is on an internal network, but Zoiper is not on the same network and no VPN is running.Please contact your provider for further assistance The PBX or SIP Provider you are trying to connect to is currently down.If the above fails, please contact your provider or PBX administrator might be able to tweak a server side setting to make things work. Please try different settings combinations of STUN (enabled or disabled) or rport for signalling (enabled or disabled).Ī combination that works on one WiFi access point or 3G/4G network might not work on another.Ī combination that works one WiFi or cellular network for a specific VoIP server might not work for another one. Zoiper has a few settings to trick the server into sending the packets to a different IP address or port. A NAT router in between the softphone and the server is causing some packets to be dropped.If you are using a jailbroken iOS iPhone or iPad, please Disable any firewalls you might have installed. A firewall on your device is blocking the traffic.A list with problematic routers and solutions can be found here It means the request you made to the web server is taking too much. Your router is intercepting and changing the packets as they pass throughīe sure to Disable SIP ALG on the router. The 408 Request Timeout Error code occurs when a connection with the website is timed out. ![]() Use TLS encryption for the SIP signalling, especially when combined with a server running SIP on port 443.(this requires server side support for TLS).contact your internet provider and ask if they allow VoIP calls on their network.This results in a request timeout error, and the server responds with the HTTP status code 408. In essence, the server is ready to establish a connection, but the client fails to send a complete request message promptly. ![]()
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