The Cisco SPA 509G IP Phone includes the following features:

Audio for unsurpassed voice clarity and enhanced speaker quality
Full-duplex speakerphone, headset, message waiting indicator, and dynamic softkeys for phone functions
4-way navigation key
Dedicated buttons for Mute, Headset, Speakerphone, Volume, Hold, Menu settings and Voicemail access
Integrated Ethernet switch port
AUX port for up to two Cisco SPA500S expansion modules, adding up to 64 additional buttons in SIP deployments
12 Line
Monochrome backlit display
12 Programmable Keys
POE support

Cisco SPA 509G is a part of the Cisco Small Business Pro Series, and is geared towards supporting the productivity needs of business users by bringing in the full advantages of IP telephony to them. With programmable keys and service parameters that can be set to your preference, Cisco SPA 509G ensures you are ahead of the way

With over a hundred customisable features, Cisco SPA 509G can operate both in Session Initiation Protocol (SIP) mode and Smart Phone Control Protocol (SPCP) mode, especially when used with the Cisco Unified Communications 500 Series. For example, it features Cisco XML applications as well as VoiceView Express, both of which are available when operating in SPCP mode. With these features, office productivity is elevated to the next level, minus any complications. Other useful features include Network Address Translation (NAT) Traversal and the support for Simple Traversal of UDP through NATs

The Cisco SPA 509G is also made to be expandable in order to meet the demanding needs of an ever growing business enterprise. In fact, you can add optional devices such as the Cisco SPA500S Expansion Modules, which can provide you with up to 64 additional functional buttons when connecting 2 of these modules. Whether your business is located in a single compound or distributed across strategic locations, Cisco SPA 509G will allow its users to continuously collaborate with one another utilising features like shared line appearances and easy station moves

Installation and configuration of the Cisco SPA 509G is a painless process. The presence of menu-based and web-based configurations provide a user friendly means of dealing with most of the maintenance and updates. Highly secure remote provisioning is available for doing performance measurements as well as troubleshooting. Encryption protocols that conform to international standards are applied to ensure no security is compromised. Software upgrades and reconfiguration are also part of this process

With 12 voice lines that, the Cisco SPA 509G is ready to use when connected directly to an internet telephony service provider. It also works with no compatibility issues with an existing IP private branch exchange. Behind each call is a consistent high voice quality, thanks to Cisco HD voice enhancement features. You can operate the IP phone using the standard handset, or use the speakerphone for a complete hands-off communication experience, with all the benefits of voice clarity in every conversation you engage in