IEC 60839-7-12:2001
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
14-10-2022
English, English - French
09-03-2001
FOREWORD
1 Scope
2 Normative references
3 Definitions
4 Abbreviations
5 Layer 7 - Application functions
6 Layer 4 - Transport
7 Notification of transmission errors
8 Monitoring of the interface to the transmission
network
9 Layer 3 - Network
10 Layer 2 - Data link
11 Layer 1 - Physical
11.1 Transmitted octets
11.2 Signal levels
Important note : All end users must be registered with an Account prior to user licenses being assigned.Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.