Broadband phone faults:

While the broadband phone system gets more advanced everyday there are still problems you should be aware of. Voice quality is one of the top issues when choosing broadband phones. Unfortunately, because the internet bandwidth varies disturbances can occur with conversations. The voice might drop out, you might experience lag in the conversation or even an echo. Another problem is compatibility. If someone isn't using the same platform for VoIP (Voice over Internet Protocol) calls there's probably a chance you won't be able to talk to each other. Though as broadband technology improves so to shall the VoIp call.