TIA 232 : F1997(R2012)

Section one
1.0 Scope
1.1 Abstracts, sections two through seven
1.2 Interface configurations
1.3 Data signaling rates
1.4 Signal common
1.5 Synchronous/nonsynchronous communication
1.6 Classes of service
1.7 Allocation of functions
1.8 Modes of operation
Section two
2.0 Signal characteristics
2.1 Electrical characteristics
2.1.1 Equivalent circuit
2.1.2 Safety considerations
2.1.3 Definition of signal states on interchange
        circuits
2.1.4 Receiver impedance
2.1.5 "Fail safe" interchange circuits
2.1.6 Generator potentials and currents
2.1.7 Requirements in transition region
2.2 Protective ground (frame ground)
2.3 Shield
Section three
3.0 Interface mechanical characteristics
3.1 Definition of mechanical interface
3.2 Cable length
3.3 25-position interface connector
3.4 Alt A 26-position interface connector
3.5 Connector pin identification
Section four
4.0 Functional description of interchange circuits
4.1 General
4.2 Categories
4.3 Signal characteristics, general
4.4 Interchange circuits
4.4.1 Circuit AB Signal common
4.4.2 Circuit BA Transmitted data
4.4.3 Circuit BB Received data
4.4.4 Circuit CA Request to send
4.4.5 Circuit CB Clear to send
4.4.6 Circuit CC DCE ready
4.4.7 Circuit CD DTE ready
4.4.8 Circuit CE Ring indicator
4.4.9 Circuit CF Received line signal detector
4.4.10 Circuit CG Signal quality detector
4.4.11 Circuit CH Data signal rate selector (DTE
                     source)
4.4.12 Circuit CI Data signal rate selector (DCE
                     source)
4.4.13 Circuit CJ Ready for receiving
4.4.14 Circuit LL Local loopback
4.4.15 Circuit RL Remote loopback
4.4.16 Circuit TM Test mode
4.4.17 Circuit DA Transmitter signal element timing
                     (DTE source)
4.4.18 Circuit DB Transmitter signal element timing
                     (DCE source)
4.4.19 Circuit DD Receiver signal element timing
4.4.20 Circuit SBA Secondary transmitted data
4.4.21 Circuit SBB Secondary received data
4.4.22 Circuit SCA Secondary request to send
4.4.23 Circuit SCB Secondary clear to send
4.4.24 Circuit SCF Secondary received line signal
                     detector
Section five
5.0 Standard interfaces for selected communication
        system configurations
5.1 Abstract
5.2 Conditions
5.3 Configurations
5.4 Use of signal common
Section six
6.0 Recommendations and explanatory notes
6.1 Classes of service
6.2 Noise considerations
6.3 Use of relays
6.4 Circuit capacitance
6.5 Test receivers
6.6 Distortion
6.7 Line signals
6.8 Use of circuit LL for "busy out"
Section seven
7.0 Glossary
Appendix A
A.1 Interconnecting cable characteristics
A.2 Example
Appendix B - References

Defines the interconnection of data terminal equipment (DTE) and data circuit-terminating equipment (DCE) employing binary data interchange.