BS 6556-2:1985

Foreword
Committees responsible
Specification
1 Scope
2 Definitions
3 General conventions
4 Data link configurations
5 Channel allocation
6 Data rate
7 Modulation parameters
8 Line spectrum
9 Modulator
10 Demodulator
11 System performance
12 Cable connections
13 Environment
14 Line circuit parameters
15 Marking
Appendix
A Cable parameters used for system performance test
Tables
1 Manner of modulator operation
2 Manner of demodulator operation
3 Performance tests
Figures
1 Simplex operation
2 Duplex point-to-point operation
3 Multi-drop operation
4 Resistive node
5 Frequency shift keying (FSK)
6 Originate channel spectrum limits
7 Answer channel spectrum limits
8 Modulator configuration
9 Demodulator configuration
10 Performance test configuration
11 Generator of 511 bit pseudo-random data
12 Core configuration of cable

Defines electrical input and output characteristics of intrinsically safe transmitting and receiving circuits forming a low speed digital data transmission link in which data is transmitted using frequency shift keying techniques

Withdrawn:This standard is no longer used