The 1600A Series phones can be programmed to automatically deliver a digital announcement to identify the location of the emergency call. Alternatively, a DTMF Touch Tone code may also be delivered. A ?Call Connected? LED can be initiated manually or automatically. All programming parameters, including phone numbers and location numbers, are stored in non-volatile E2 memory. All units are phone line powered, requiring no batteries or external power and are compatible with common Central Station Monitoring equipment.