Centrex OR Multi-Line Comaptible * Multiple Access Directory Numbers And Single Call Arrangment (MADN SCA) * CLASS/CMS Compatible *8 Programmable Line/Feature Keys * Group Intercom * Call Reason Display * Headset Compatible * Single Line Call Queuing * Larger Keypad Buttons * Music on Hold * Volume Control * Hold/Release Keys * On-Hook Dialing * Loop Powered * Message Waiting Indicator * Redial * Desk/Wall * Power