The device's screen displays “No Service” when a SIP account doesn't registers successfully. Submit a support ticket hereand we’ll look into the issue.
Make sure the Ethernet cable is plugged into the Internet port on the phone and the Ethernet cable is not loose. Make sure the switch or hub in your network is operational. If these steps don't resolve the issue, we’ll need to investigate further. ...
Trying to make an outgoing call and having issues connecting? Are you receiving a “call failed” error? In this guide, we put together all of the possible causes to help you diagnose and resolve. Possible reasons Connection issues As a VOIP phone, ...
SIP ALG (Application Layer Gateway) is a mechanism found in most routers that rewrites packets transmitted across the device. Certain protocols are processed by the application layer gateway (ALG) and rewritten to allow better flow through a firewall ...