3CXPhone is a great VoIP phone for businesses. It’s easy to deploy and manage for network administrators. Users will love it for its cool look and intuitive interface. 3CXPhone can easily be configured as a remote extension, allowing users away from the office to easily connect to the corporate phone system. The unique tunnel feature proxies all SIP & RTP traffic over a single port and makes firewall and NAT configuration a breeze. It is also possible to configure it as a remote extension using ‘direct SIP’. The comapny has released 3CXPhone 4 a new version which has a pretty cool new interface with an iphone look and feel.
Download: 3CXPhone 4