Enjoy superb sound quality when conducting business with this dual-mode conference phone. Utilizing analog and VoIP connections, the phone offers flexibility, while the Polycom HD Voice technology makes it so calls come through crystal clear. Dual-mode conference phone operates on analog and IP connections to ensure crystal-clear call quality. 2 lines provide flexibility for your business. Voicemail lets you receive messages when you're not available. Call waiting/caller ID displays the name and number of incoming calls. Call waiting/caller ID service required from your local telephone company. Polycom HD Voice technology and full-duplex audio boasts echo cancellation and resists cell phone interference to ensure high-quality calls. Easy to set up and use. Backed by the manufacturer's 1-year limited warranty.