Meets ADA requirements for Emergency Phones:Can automatically light the Call Connected LED for the hearing impairedTransmits a unique location I.D. code or voice announcementGrade 2 Braille label for the visually impairedNon-volatile digital voice announcer with 16 seconds of voice memoryAdvanced call progress detectionHandsfree operationPhone line poweredNon-volatile E2 memory (no batteries required)Touch Tone or pulse dialingDials up to 5 emergency numbersE-1600-20A and E-1600-52A dial up to 3 non-emergency quotInfoquot numbersCycles through backup emergency and non-emergency numbers on busy or no-answerHangs up on CPC silence busy signal dial tone time-out or Touch Tone commandProgrammable to auto-answer on incoming callsRemotely programmableCentral Station Monitoring capability (dials 2 numbers)Separate central station voice speed dial numberOptional PB-100 Polling System availablePower: Telephone line powered 24V DC talk battery with 20mA loop current minimum Dimensions: 133mm x 102mm x 51mm (5.25 x 4.0 x 2.0)Power: Telephone line powered 24V DC talk battery with 20mA loop current minimumHumidity - Standard Products: 5% to 95% non-condensingHumidity - EWP Products: Up to 100%