Alarm systems - Alarm transmission systems and equipment - Part 2-3: Requirements for equipment used in systems with digital communicators using the public switched telephone network
This standard specifies the requirements for equipment used in digital communicator systems utilising the Public Switched Telephone Network which are in addition to those specified in EN 50136-2-1. The remote centre will normally be an alarm receiving centre but may be a satellite station with onward transmission using an alarm transmission system meeting the requirements of EN 50136-1-2.