1 Introduction and scope
1.1 Facsimile terminals
1.2 Facsimile DCE
1.3 Scope
1.4 Overview
1.4.1 Service Class 1
1.4.2 Service Class 2
2
Normative references
3
Definitions
4
Abbreviations
5
Facsimile DTE-DCE interchange circuits
5.1 Communication link data rates
5.2 Asynchronous to synchronous conversion
5.3 Flow control
5.4 Serial data interchange circuits
5.4.1 Mandatory circuits
5.4.2 Optional circuits
5.4.3 Optional circuit behaviour
6
Autodialler services
6.1 Command syntax
6.1.1 Character set and format
6.1.2 DTE command lines
6.1.3 Basic command syntax
6.1.4 Extended command syntax
6.1.5 Extended command parameter values
6.1.6 Issuing commands
6.2 Command execution
6.2.1 Command execution time
6.2.2 Aborting commands
6.3 DCE response syntax
6.3.1 Information text responses
6.3.2 Result
code responses
6.4 Capabilities identification and control
6.5 Call answering
6.6 Call origination
6.7 Call termination
6.8 DCE autodialler result codes
6.9 Serial port flow control
6.10 Serial port rate control
6.10.1 Autobaud operation, +IPR=0
6.10.2 Fixed rate operation, +IPR>0
6.11 Data stream transparent commands
6.11.1 DTE to DCE streams
6.11.2 DCE to DTE streams
7
Facsimile Class 2 services
7.1 Connection
7.1.1 Answer connection
7.1.2 Originate connection
7.2 Configuration
7.2.1
Configuration and identification of T.30 options
7.2.2 Configuration and identification of T.30
procedure parameters
7.2.3 Configuration of answer behaviour
7.3 Session status reporting
7.4 Phase C data transfer
7.5 Phase C error checking
7.6 Phase C data conversion
7.7 T.30 error correction mode
7.8 Non-standard facilities
7.9 Transition to Service Class 1
7.10 Procedure
interrupt negotiation
7.11 2400 bit/s negotiation
7.12 Packet protocol
8
Service Class 2 commands and responses
8.1 Summary of commands and responses
8.1.1 Service Class 2 action commands
8.1.2 Service Class 2 DCE responses
8.1.3 Service Class 2 parameters
8.1.4 Service Class 2 optional parameters
8.1.5 Service Class 2 transparent data commands
8.1.6 Single character commands
8.2 Service class identification and selection
8.2.1 Service class indication, +FCLASS?
8.2.2 Service class capabilities, +FCLASS=?
8.2.3
Service class selection, +FCLASS=<value>
8.3 Facsimile Service Class 2 action commands
8.3.1 Originate command, ATD
8.3.2 Answer command, ATA
8.3.3 Data transmission, +FDT
8.3.4 Data reception, +FDR
8.3.5 Session termination, +FKS
8.3.6 Initialize facsimile parameters, +FIP
8.4 Facsimile service Class 2 DCE responses
8.4.1
T.30 phase A responses
8.4.2 T.30 phase B negotiation responses
8.4.5 Call termination status, +FHS:
8.5 Facsimile service Class 2 parameters
8.5.1 T.30 session parameters
8.5.2 T.30 procedure control parameters
8.5.3 DTE-DCE interface parameters
8.6 Session message report responses
8.6.1 Report transmit HDLC frames, +FHT:
8.6.2 Report received HDLC frames, +FHR:
9
DCE-DTE packet protocol
9.1 Message types
9.1.1 Facsimile DCE response lines
9.1.2 Received Phase C data
9.1.3 Single control characters
9.2 DCE packet sender procedure
9.3 DTE packet receiver procedure
9.4 Packet protocol example transfers
9.5 DC1 and DC3 characters
9.6 SOH and ETB characters
9.7 Octet count
9.8 Early detection of data loss
Annex A – Interworking with existing facsimile DTE
Annex B – Service Class 1 and Service Class 2 interworking
B.1 Transitions from Class 2 to Class 1
B.2 Transitions from Class 1 to Class 2
Appendix I – Service Class 2 parameter and subparameter values
Appendix II – Service Class 2 example sessions
II.1 Send two pages, 1‑D data, no errors
II.3 Send two complex documents
II.4 Receive two documents
II.5 Polling: dial, send and poll receive
II.6 Polling: answer, receive and poll send
II.8 Receive one page with line errors and retransmission
II.11 Send two documents with procedure interrupts
II.12 Receive two documents with procedure interrupts
II.14 Receive one page with packet protocol
Appendix III – Alphabetic index of commands, parameters and responses
III.1 Action commands
III.2 Responses
III.3 Parameters