Issue

IP phones or Softphones fail to register with the VoIP Service.

Possible Causes and Solutions

The issues with IP phones or softphones failing to register with the VoIP service can have several reasons:

Reason 1. Incorrect Credentials

Ensure that your username and password are entered correctly on the device.

Reason 2. Network Blocks

Ensure that firewalls or routers are not blocking SIP registration packets.

Refer to this page for the IP addresses and port ranges required to configure firewall settings.

Reason 3. Incorrect Credentials

Verify that the extension credentials are defined correctly.

You can check this page for detailed instructions on setting up VoIP services.