Figure C-9/Q.714 - T1115320-88

                                Figure C-10/Q.714 (sheet 1 of 4) - T1115330-88

                                Figure C-10/Q.714 (sheet 2 of 4) - T1115340-88

                                Figure C-10/Q.714 (sheet 3 of 4) - T1115350-88

                                Figure C-10/Q.714 (sheet 4 of 4) - T1115360-88

                                        Figure C-11/Q.714 - T1115370-88

                                        Figure C-12/Q.714 - T1115380-88
























































                                                         Fascicle VI.7 - Rec. Q.714  PAGE79

                                                   ANNEX D
                                     (to Recommendation Q.714)
             State transition diagrams (STD) for SCCP management control
         D.1    General
               This Annex contains the description of the SCCP management (SCMG)  function
         according to the CCITT Specification and Description Language (SDL).
               For  the  SCCP  management  function,  Figure   D-1/Q.714   illustrates   a
         subdivision into functional blocks, showing their functional interactions as well
         as the  functional  interactions  with  the  other  major  functions  (e.g.  SCCP
         connectionless  control  (SCLC)).  This  is  followed  by  Figures  D-2/Q.714  to
         D-10/Q.714 showing state transition diagrams for each of the functional blocks.
               The detailed functional  breakdown  shown  in  the  following  diagrams  is
         intended to illustrate a reference model, and to  assist  interpretation  of  the
         text of the  SCCP  management  procedures.  The  state  transition  diagrams  are
         intended to show precisely the behaviour of the signalling  system  under  normal
         and abnormal conditions as viewed from a remote location. It must  be  emphasized
         that the functional partitioning shown in the following diagrams is used only  to
         facilitate understanding of the system behaviour, and is not intended to  specify
         the functional partitioning to be adopted in a practical  implementation  of  the
         signalling system.
         D.2    Drafting conventions
               Each major function  is  designated  by  its  acronym  (e.g.  SCMG  =  SCCP
         management).
               Each functional block is also designated by an acronym which identifies  it
         (e.g. SSAC = Sub-System Allowed Control).
               External inputs and outputs are used  for  interactions  between  different
         functional blocks. Included within each input and  output  symbol  in  the  state
         transition diagrams are acronyms which identify the functional blocks  which  are
         the source and the destination of the message, e.g.:
               SSAC ® SSTC indicates that the message  is  sent  from  Sub-System  Allowed
         Control to Sub-System Test Control.
               Internal inputs and outputs are only used to indicate control of timers.
         D.3    Figures
               Figure D-1/Q.714 shows  a  subdivision  of  the  SCCP  management  function
         (SCMG) into smaller functional blocks, and also shows the functional interactions
         between them. Each of these functional blocks is described in detail in  a  state
         transition diagram as follows:
               a)   Signalling  Point  Prohibited  Control  (SPPC)  is  shown  in  Figure
                  D-2/Q.714;
               b)  Signalling Point Allowed Control (SPAC) is shown in Figure D-3/Q.714;
               c)  Signalling Point Congested Control (SPCC) is shown in Figure D-4/Q.714;
               d)  Sub-System Prohibited Control (SSPC) is shown in Figure D-5/Q.714;
               e)  Sub-System Allowed Control (SSAC) is shown in Figure D-6/Q.714;
               f)  Sub-System Status Test Control (SSTC) is shown in Figure D-7/Q.714;
               g)  Coordinated State Change Control (CSCC) is shown in Figure D-8/Q.714;
               h)  Local Broadcast (LBCS) is shown in Figure D-9/Q.714;
               i)  Broadcast (BCST) is shown in Figure D-10/Q.714.






















         PAGE96  Fascicle VI.7 - Rec. Q.714

                 D.4    Abbreviations and timers
                Abbreviations and timers  used  in  Figures  D-1/Q.714  to  D-10/Q.714  are
          listed below.
                Abbreviations
                 BCST   Broadcast
                 CSCC   Cooordinated State Change Control
                 DPC     Destination Point Code
                 LBCS   Local Broadcast
                 MSG Message
                 MTP Message Transfer Part
                 SCCP   Signalling Connection Control Part
                 SCLC   SCCP Connectionless Control
                 SCMG   SCCP Management
                 SCOC   SCCP Connection-Oriented Control
                 SCRC   SCCP Routing Control
                 SOG Sub-System Out of Service Grant
                 SOR     Sub-System Out of Service Request
                 SP      Signalling Point
                 SPAC   Signalling Point Allowed Control
                 SPCC   Signalling Point Congested Control
                 SPPC   Signalling Point Prohibited Control
                 SS      Sub-System
                 SSA     Sub-System Allowed
                 SSAC   Sub-System Allowed Control
                 SSP     Sub-System Prohibited
                 SSPC   Sub-System Prohibited Control
                 SST     Sub-System Status Test
                 SSTC   Sub-System Status Test Control
                 UIS     User In Service
                 UOS User Out of Service
                Timers
                 T(stat. info.)           Delay  between  requests  for  sub-system  status
                     information
                 T(coord. chg.)          Waiting for grant for  sub-system  to  go  out  of
                     service
                 T(ignore SST)           Delay for sub-system between receiving grant to go
                              out of service and actually going out of service
































                                                         Fascicle VI.7 - Rec. Q.714  PAGE79

                                       Figure D-1/Q.714 - T1115390-88

                                       Figure D-2/Q.714 - T1115400-88

                                       Figure D-3/Q.714 - T1115410-88

                                       Figure D-4/Q.714 - T1115420-88

                                Figure D-5/Q.714 (sheet 1 of 2) - T1115430-88

                                Figure D-5/Q.714 (sheet 2 of 2) - T1115440-88

                                Figure D-6/Q.714 (sheet 1 of 2) - T1115450-88

                                Figure D-6/Q.714 (sheet 2 of 2) - T1115460-88

                                       Figure D-7/Q.714 - T1115470-88

                                Figure D-8/Q.714 (sheet 1 of 2) - T1115480-88

                                Figure D-8/Q.714 (sheet 2 of 2) - T1115490-88

                                Figure D-9/Q.714 (sheet 1 of 2) - T1115500-88

                                Figure D-9/Q.714 (sheet 2 of 2) - T1115510-88

                                       Figure D-10/Q.714 - T1115520-88










































         PAGE96  Fascicle VI.7 - Rec. Q.714