A VoIP phone system can be deployed with minimum security risk providing the implementation is well planned and designed, an IT security specialist has said.

More and more businesses are turning to VoIP because of the cost savings and functionality such systems offer.

However, as with all internet-based technologies there is a risk factor associated with VoIP usage.

Consultancy NTA Monitor pointed out that sub-standard security in remote access gateways and web applications can leave a VoIP phone system vulnerable.

Those problems can be avoided if sufficient care is taken during the configuration stage, the company said, but anyone attempting to take shortcuts may run into problems.

Roy Hills, technical director for NTA Monitor, said: "The route to a robust VoIP deployment and the efficiencies that an integrated network can provide is via careful configuration, particularly separation and encryption, and a considered view of the implications, policies and procedures associated with VoIP."

Meanwhile, a California-based voice and video communications firm has predicted that the number of VoIP applications aimed at mobile users will increase in the coming years.

Global IP Solutions said the growth in the smartphone sector offered opportunities for real-time VoIP developers.