ALARM SYSTEMS - PART 7-12: MESSAGE FORMATS AND PROTOCOLS FOR SERIAL DATA INTERFACES IN ALARM TRANSMISSION SYSTEMS - PTT INTERFACES FOR DEDICATED COMMUNICATIONS CHANNELS USING ITU-T RECOMMENDATION V.23 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 Notification of transmission errors<br>8 Monitoring of the interface to the transmission <br> network<br>9 Layer 3 - Network<br>10 Layer 2 - Data link<br>11 Layer 1 - Physical<br> 11.1 Transmitted octets<br> 11.2 Signal levels
Provides the requirements for standard interfaces between the alarm system transceivers and transmission network where both form part of a dedicated channel alarm transmission system as defined in IEC 60839-5-4. It applies equally to the interface between an alarm system and the transmission where the alarm system transceiver functions are integrated into the control and indicating equipment (CIE). It also applies to the interface to the transmission network from the terminal receiver at the alarm receiving centre.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 79 |
