-Single-line guestroom telephone HAC/VC (ADA) handset volume boost with three distinct levels EasyAccess Data Port ExpressNet-Ready Raised red message waiting lamp MultiX Message Waiting Circuitry Advanced Microprocessor Technology Non-volatile EEPROM memory (requires no battery) Electronic ringer Supports full-length paper faceplate Desk or wall mountable Hidden programming button Textured finish resists smudges and scratches