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• CCITT Rec. Q.713 (11/1988) – SCCP FORMATS AND CODES
• 1 General
  • 1.1 Routing label
  • 1.2 Message type code
  • 1.3 Formatting principles
  • 1.4 Mandatory fixed part
  • 1.5 Mandatory variable part
  • 1.6 Optional part
  • 1.7 End of optional parameters octet
  • 1.8 Order of transmission
  • 1.9 Coding of spare bits
  • 1.10 National message types and parameters
• 2 Coding of the general parts
  • 2.1 Coding of the message type
  • 2.2 Coding of the length indicator
  • 2.3 Coding of the pointers
• 3 SCCP parameters
  • 3.1 End of optional parameters
  • 3.2 Destination local reference
  • 3.3 Source local reference
  • 3.4 Called party address
    • 3.4.1 Address indicator
    • 3.4.2 Address
  • 3.5 Calling party address
  • 3.6 Protocol class
  • 3.7 Segmenting/reassembling
  • 3.8 Receive sequence number
  • 3.9 Sequencing/segmenting
  • 3.10 Credit
  • 3.11 Release cause
  • 3.12 Return cause
  • 3.13 Reset cause
  • 3.14 Error cause
  • 3.15 Refusal cause
  • 3.16 Data
• 4 SCCP messages and codes
  • 4.1 General
    • 4.1.1 In the following sections, the format and coding of the SCCP messages is specified.
    • 4.1.2 For each parameter the table also includes:
  • 4.2 Connection request (CR)
  • 4.3 Connection confirm (CC)
  • 4.4 Connection refused (CREF)
  • 4.5 Released (RLSD)
  • 4.6 Release complete (RLC)
  • 4.7 Data form 1 (DT1)
  • 4.8 Data form 2 (DT2)
  • 4.9 Data acknowledgement (AK)
  • 4.10 Unitdata (UDT)
  • 4.11 Unitdata service (UDTS)
  • 4.12 Expedited data (ED)
  • 4.13 Expedited data acknowledgement (EA)
  • 4.14 Reset request (RSR)
  • 4.15 Reset confirm (RSC)
  • 4.16 Protocol data unit error (ERR)
  • 4.17 Inactivity test (IT)
• 5 SCCP Management messages and codes
  • 5.1 General
    • 5.1.1 SCMG format identifier
    • 5.1.2 Formatting principles
  • 5.2 SCMG message parameters
    • 5.2.1 End of optional parameters
    • 5.2.2 Affected SSN
    • 5.2.3 Affected PC
    • 5.2.4 Subsystem multiplicity indicator
  • 5.3 SCMG messages
• ANNEX A (to Recommendation Q.713) – Mapping for cause parameter values
  • A.1 Introduction
  • A.2 Connection refusal
  • A.3 Connection release
  • A.4 Connection reset