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• CCITT Recommendation X.28 (11/1988) – DTE/DCE INTERFACE FOR A START-STOP MODE DATA TERMINAL EQUIPMENT ACCESSING THE PACKET ASSEMBLY/DISASSEMBLY FACILITY ...
• CONTENTS
• Preface
• 1 Procedures for the establishment of a national access information path between a start-stop mode DTE and a PAD
  • 1.1 Access via a public switched telephone network or leased lines with V-Series interfaces
  • 1.2 Access via a public switched data network or via leased lines with X-Series interfaces
• 2 Procedures for character interchange and service initialization between a start-stop mode DTE and a PAD
  • 2.1 Format of characters used in the exchange of control information between start-stop mode DTE and a PAD
  • 2.2 Procedures for initialization
• 3 Procedures for the exchange of control information between a start-stop mode DTE and a PAD
  • 3.1 General
  • 3.2 Procedures for virtual call control
  • 3.3 Procedures for setting or changing the values of PAD parameters
  • 3.4 Procedures for reading the values of one or several parameters by the start-stop mode DTE
  • 3.5 Formats of PAD command signals and PAD service signals
  • 3.6 Editing functions in the PAD
  • 3.7 Procedure for request of status of the virtual call
• 4 Procedures for the exchange of user data between a start-stop mode DTE and a PAD
  • 4.1 Data transfer state
  • 4.2 Data from the start-stop mode DTE received by the PAD
  • 4.3 Delivery of user data to the start-stop mode DTE
  • 4.4 Data forwarding conditions
  • 4.5 Procedure for the PAD to indicate to the start-stop mode DTE, by means of a PAD service signal, a temporary ...
  • 4.6 Procedures for transmission of X-ON and X-OFF by the PAD
  • 4.7 Procedures for reset
  • 4.8 Procedure for indication of break
  • 4.9 Escape from the data transfer state
  • 4.10 Echo
  • 4.11 Selection of the procedure on receipt of the break signal from the start-stop mode DTE
  • 4.12 Selection of padding characters to be inserted after the character 0/13 (CR)
  • 4.13 Selection of line folding
  • 4.14 Procedure for the start-stop mode DTE to indicate to the PAD a temporary inability to accept additional information
  • 4.15 Selection of linefeed insertion after carriage return
  • 4.16 Selection of padding characters to be inserted after the character 0/10 (LF)
  • 4.17 Editing of user data
  • 4.18 Page wait
  • 4.19 Interleaving of echo and output
• 5 Formats of additional PAD command signals and PAD service signals available in the extended dialogue mode
  • 5.1 Format of the break PAD command signal
  • 5.2 Format of the NUI ON and NUI OFF PAD command signals
  • 5.3 Format of the language PAD command signal
  • 5.4 Format of the help PAD command signal
  • 5.5 Standard format of the help PAD service signal
• ANNEX A – PAD command signals and PAD service signals
• ANNEX B – PAD Time-outs
• ANNEX C – PAD service signals for extended dialogue mode