Description: The MIB for managing Signalling Points and its 
        associated messages transported over Signalling 
        System  No. 7 (SS7) Network via Cisco IP Transfer
        Point.  
        
        The Cisco IP Transfer Point (ITP) is a hardware 
        and software solution that transports SS7 traffic 
        using IP. Each ITP node provides function similar
        to SS7 Signalling point.   
        
        The relevant ITU documents describing this technology
        is the ITU Q series, including ITU Q.700: Introduction
        to CCITT Signalling System No. 7 and ITU Q.701 
        Functional description of the message transfer part
        (MTP) of Signalling System No. 7. 
        
        This MIB models the SP as follows:
        
        The SP is associated with one or more point codes.
        Each pointcode is associated with:
          an SS7 variant, timers, and linksets.
        
        Linksets contain:
          destination point code 
          linkset byte/packet statistics,
          accounting information per Destination Point 
          Code(DPC) and Originating Point Code (OPC) 
          violation accounting information per DPC and OPC
          links,  reference to incoming and outgoing ACL
          reference to a routing table for each SS7 packet type
        
        Links contain:
          timers, and byte/packet statistics.
        
        The figure below provides a diagrammatic representation
        of the relationships. Each box may be replicated
        providing multiple instances of the object. 
        
        '--->' indicates that the object to the left contains
        a reference to the object to the right.
        
        '###>' indicates that the object to the left contains
        an instance of the object to the right.
        
        The down arrow indicates that the object being pointed
        to contains snmp indices of the objects above it.
        
        
          ________________
         |                |
         |      Sp        |###> point code, timers
         |________________|
                 |
                 V
          ________________
         |                |
         |                |---> Accounting
         |    Linkset     |---> Violation Accounting
         |                |---> Incoming ACL
         |                |---> Outgoing ACL
         |________________|---> Routing Tables.
                 |
                 V
          ________________
         |     Link       |###> timers
         |________________|---> statistics


Abbreviations:
  AERM  - Alignment Error Rate Monitor
  CLLI  - Common Language Location Codes 
  HSL   - High Speed Link (ATM based)
  LLSC  - link set control 
  LSAC  - Signalling link activity control
  LSDA  - Signalling data link allocation 
  LSLA  - Signalling link activation 
  LSLD  - Signalling link deactivation 
  LSLR  - Signalling link restoration 
  LSSU  - Link Status Signal Unit
  LSTA  - Signalling terminal allocation 
  MTP   - Message Transport Protocol
  MTP2  - Layer 2 of Message Transport Protocol
  MTP3  - Layer 3 of Message Transport Protocol
  PC    - Point Code
  RTN   - RouteTableName
  SCTP  - Stream Transmission Protocol(RFC 2960)
  SIB   - Status Indicator Busy
  SP    - Signalling Point
  SS7   -  System  No. 7 (SS7) Network
  SUERM - Signal Unit Error Rate Monitor 
  TCBC  - Changeback control
  TCOC  - Changeover control
  TCRC  - Controlled rerouting control
  TFRC  - Forced rerouting control
  TLAC  - Link availability control
  TPRC  - Signalling point restart control
  TRCC  - Signalling route set congestion control
  TSFC  - Signalling traffic flow control
  TSRC  - Signalling routing control