IEC 60839-5-6 Ed. 1.0 b:1991
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Alarm systems – Part 5: Requirements for alarm transmission systems – Section 6: Requirements for voice communicator systems using the public switched telephone network
International Electrotechnical Commission , 05/03/1991
Pages: 15
Specifies the requirements for voice communicator systems using the public switched telephone network which are additional to those specified in IEC 60839-5-1 and IEC 60839-5-2. Covers switched connections providing event driven signalling between an alarm system and a remote centre.
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