The Cisco IP Phone 6900 Series is a new and innovative portfolio of endpoints that deliver affordable, business-grade, voice communication services to customers worldwide. Six models are available: the Cisco Unified IP Phone 6901 (trimline), Cisco Unified IP Phone 6911 (one -line), Cisco Unified IP Phone 6921 (two-line), Cisco Unified IP Phone 6941 (four-line) Cisco Unified IP Phone 6945 (four -line), and Cisco Unified IP Phone 6961 (twelve-line). Most of the models support full-duplex speakerphones for a more productive, more flexible, and easier-to-use endpoint experience. Some models introduce support for single-call per-line appearance, offering a traditional telephony-like interaction for customers who seek this type of call experience for their users. Fixed keys for hold, transfer, and conference, tri-color LED line and feature keys also make the phone simpler and easier to use.