Thanks to the VoIP Phone service, an increasing number of companies and businesses are enjoying increased productivity and reduced phone bills. Regardless of the many benefits associated with this phone system, things may go wrong from time to time. In such times you may call the service provider to solve the issue or try the following tips to solve the issue on your own.
Dial Tone without Audio
The presence of a dial tone, but no audio is a problem that is normally related to the forwarding port within the router. If a tone is present, SIP signalling on port 5060 is successful. However, the ports, through which the real audio packets are carried, may be faulty. In most cases, ports 16384 to 16482 are the ones used for this purpose and may be configured appropriately to solve the issue.
If you experience an acoustic echo while using your VoIP Phone, your volume may be too high such that the sound is being picked by the microphone. Lowering the volume may solve this problem.
Absence of the Dial Tone
The absence of a dial tone is a serious issue that is mostly related to the phone. The following are the two main causes of this problem:
- Router Port Forwarding: In most cases, routers tend to forward UDP ports 5060 to 5090 and 16384 to 1648. This number may differ from one service provider to another. However, forwarding these ports may solve the no dial tone problem.
- IP Phone Provisioning: If you purchased the phone directly from your provider, it should be auto-provisioned. If this is not the case, you need to carry out manual provision. In this case, you need to apply the credentials provided by your service provider. After this, you should verify that the VoIP Phone is in registered state, an indication that the authentication was successful.
With the troubleshooting tips mentioned above, you should be able to identify and rectify the problem with your VoIP Phone. Otherwise, you should contact your service provider for assistance.