This MIB module provides connectivity related
information for devices (e.g., 'connectivity between 
voice gateway, phones, gatekeepers and call processing 
agent').  The MIB can be used by network management 
applications to collect the information regarding voice 
connectivity among the devices in the network.  The MIB 
can also be used to retrieve the status of voice 
connectivity between the devices.    

*** ABBREVIATIONS, ACRONYMS, AND SYMBOLS ***

SCCP -  Skinny Client Control Protocol

SGCP -  Simple Gateway Control Protocol

MGCP -  Media Gateway Control Protocol

H323 -  H.323 protocol

SIP  -  Session Initiation Protocol


*** DEFINITIONS ***

CALL AGENT
A call processing agent component of a device in IP 
telephony and VoIP network.

PORT
A port on the device that is associated with call 
processing agent.

REGISTRATION
In an IP telephony network, there are typically keep-
alive messages or expected registration refresh timers
that are used to formulate the registration status of 
devices and/or users.  
Possible values of the registration status are as 
follows:
registered:   The port has successfully registered with
              the call agent

unregistered: The port is no longer registered with the
              call agent

rejected:     Registration request from the port was 
              rejected by the call agent.