. This flexible SIP-based conference phone delivers clear natural sound from OmniSound 2.0 Avaya\'s patented wideband audio technology. The phone is packed with intelligent features for more efficient conference calls. Use the conference guide to call pre-programmed groups. Import and export contact details conveniently via the web interface. Create your own phone book with the personal user profile feature. The Avaya B179 accommodates expansion microphones an external wireless headset and a PA system making it ideal for large conferences..