This MIB is an extension to the 
CISCO-CDMA-PDSN-MIB.  A CDMA
network supports wireless data
communication through 3G CDMA radio 
access technology and 3G A10/A11
interface.  PDSN acts as a foreign  
agent that establishes, maintains
and terminates the link layer to a
mobile station.
        
The high level architecture of a third
generation CDMA network is shown below:
        
+========+=+           +====+        +=======+
| RAdio  |P|           |    | Data   |  Home |
| Network|C|==A10/A11==|PDSN|===Core=|Network|
|  (RAN) |F| Interface |    |Network |       |
+========+=+           +====+   (DCN)+=======+
  /|\              Foreign Agent    Home Agent
   |                  (FA)           (HA)
   |   Visited Access
   |  Provider Network
   |
  \|/
+========+
| Mobile |
| Station|
| (MS)   |
+========+
                                                          
The following diagram illustrates protocols
usage by the CDMA network elements:
        
MS=== RAN=== PDSN === DCN == Home Network
|        |  A10/A11   |               |
|        +=signaling==+               |
|                     |               |
|                     +...L2TP/L2F    |
                          tunnelling..+
|                     |               |
+======== PPP ========+               |
|                     |               |
|                     +..Mobile IP    |
                         tunnelling.. +
|                                     |
|                                     |
|                                     |
+=================Mobile IP===========+
|                                     |
|                                     |
+======================data===========+
        
        							
The CDMA PDSN EXTENSION MIB provides
operational information for a CDMA
PDSN implementation.
The following areas are managed:
        												
1) Global PDSN information.  This area contains 
  generic information such as the number of 
  auxiliary connections per session, PDSN
  IpAddress, system bandwidth etc.
        							
2) PDSN session information.  This area contains
  details about PPP sessions maintained by the
  PDSN router and other related information such
  as flows or PCF.
        
3) Failure notification.  This area contains 
  details of notifications sent to
  network management applications in case 
  of session creation failure.
        
        							                       
Acronyms and terms:
        
A10/A11          A10 interface is a virtual 
interface        interface used for
                transporting data between
                the RAN and the PDSN.
                A11 interface is the signaling
                protocol used for maintaining a
                logical connection between 
                the RAN and PDSN.
CAC              Call Admission Control
        
CDMA             Code Division Multiple Access
        
DCN              Data Core Network
        
DSCP             Differentiated Services Code Point
        
GRE              Generic Routing Encapsulation
        
HRPD             High Rate Packet Data
        
MN               Mobile Node
        
Mobile IP        Protocol enhancements that allow
                transparent routing of IP datagrams
                to mobile nodes.
                Refer to RFC 2002 for more details.
        
MS               Mobile Station
        
NVSE             Non Vendor Specific Extension
        
PCF              Packet Control Function
        
PDSN             Packet Data Serving Node
        
PPPoGRE          Point-to-Point over
                Generic Routing Encapsulation
        
PPPoHDLC         Point-to-Point over
                High Level Data Link Control
        
PDSN session     A PPP connection between a MS and
                the PDSN.  One session may contain
                one or multiple PDSN flows.
        
QOS              Quality of Service
        
RAN/RN           Radio Network
        
ROHC             Robust Header Compression. Refer to
                RFC 3095 for more details.
        
RP               Radio Packet
        
RSVP             Resource Reservation protocol
        
Simple IP        IP routing used by a MS when MoIP
                services are not needed
        
SO               Service Option
          
TFT              Traffic Flow Template.