Rec. ITU-T Q.713 (03/1993) SIGNALLING SYSTEM No. 7 - SCCP FORMATS AND CODES
FOREWORD
CONTENTS
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
    3.5 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
    3.17 Segmentation
    3.18 Hop counter
4 SCCP messages and codes
    4.1 General
    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)
    4.18 Extended unitdata (XUDT)
    4.19 Extended unitdata service (XUDTS)
5 SCCP Management messages and codes
    5.1 General
    5.2 SCMG message parameters
    5.3 SCMG messages
Annex A Mapping for cause parameter values
A.1 Introduction
A.2 Connection refusal
A.3 Connection release
A.4 Connection reset