T7316E  Key Features: Modular design: Allows the T7316E to be deployed anywhere as a feature-rich standalone solution; or, by adding the T24 Key Indicator Module, as a Central Answering Position for efficient call routing. Integrated busy lamp field/Direct station select: Increases customer satisfaction while improving operator efficiency by utilizing multi-segment icons for accurate and efficient routing of customer inquiries. Audio control center: Simplifies telephone operation by clustering common audio features for fast and precise toggle action between handset, headset, and speaker. Built-in speaker: Improves communication by providing hands-free audio capability for multi-tasking and group participation. Menu-driven display with soft keys: Provides users with an intuitive interface for fast and accurate access to system features.   M7310  Key Features: Two-way speakerphone 10 programmable line / feature buttons. 12 dual-function memory buttons provide quick access to 24 additional frequently-used features or autodial numbers 2-line by 16-character LCD Window with soft-keys for system navigation