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