VoIP gateways are potentially one of the weakest links in the chain. When VoIP is used on an external network, gateway technology converts the data package from the IP network into voice before sending them over a public telephone network. The concern is that at this point, VoIP can be hacked by unscrupulous users to gain access to free calls. The trick to prevent this lies, once again, through password protection and making sure that the gateway is configured in such a way as to ensure that only people with the correct access codes are permitted to make and receive VoIP calls.

going in and out of your network. As VoIP works by breaking voice messages into digital data, a standard firewall installed in your PC may not be enough to offer you full protection. VoIP providers have much more stringent firewalls installed on their main servers, which protects the entire network and all

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