ALARM SYSTEMS - PART 7-20: MESSAGE FORMATS AND PROTOCOLS FOR SERIAL DATA INTERFACES IN ALARM TRANSMISSION SYSTEMS - TERMINAL INTERFACES EMPLOYING ITU-T RECOMMENDATION V.24/V.28 SIGNALLING
International Electrotechnical Committee
FOREWORD<br>1 Scope<br>2 Normative references<br>3 Definitions<br>4 Abbreviations<br>5 Layer 7 - Application functions<br>6 Layer 4 - Transport<br>7 Layer 2 - Data link<br> 7.1 Configuration<br> 7.2 Transmission system failure<br> 7.3 Unsuccessful transmission<br> 7.4 Connection integrity<br>8 Layer 1 - Physical<br> 8.1 Transmitted octets<br> 8.2 Signal levels<br> 8.3 Transmission rate
Gives the requirements for standard interfaces between the terminal transceiver of an alarm transmission system and the annunciation equipment. It applies equally to the transmission of alarms and other messages to/from intrusion, fire, access control and social alarm systems, and to the transmission of information to/from other similar systems.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 79 |
