IEC 60839-7-20:2001 

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


Do you need a multi-user copy?




Specifies the requirements for standard interfaces between the terminal transceiver of an alarm transmission system and the annunciation equipment. Employs signalling in accordance with ITU-T Recommendation V.24/V.28.

Look inside

Additional information

Publication typeInternational Standard
Publication date2001-03-09
Available language(s)English, English/French
TC/SCTC 79 - Alarm and electronic security systemsrss
ICS13.320 - Alarm and warning systems
Stability date  2020
File size937 KB

The following test report forms are related:

Share your publications

Learn how to share your publications with your colleagues, using networking options.

Payment information

Our prices are in Swiss francs (CHF). We accept all major credit cards (American Express, Mastercard and Visa), PayPal and bank transfers as form of payment.

Keep in touch

Keep up to date with new publication releases and announcements with our free IEC Just Published email newsletter.

Contact customer services

Please send your enquiry by email or call us on +41 22 919 02 11 between 09:00 – 17:00 CET Monday to Friday.