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ADCP-75-192 • Issue 2 • June 2007
Page 5
© 2007, ADC Telecommunications, Inc.
These databases are provided through Management Information Bases (MIBs) and an SNMP
proxy agent embedded in the system software. SNMP (Simple Network Management Protocol)
is an internet standard protocol enabling online devices to be queried and controlled remotely
using an IP interface. A MIB is a table-like set of “objects” conforming to SNMP specifications.
Each object represents an individual alarm (such as RF overdrive in the Digivance system) or an
individual object (such as Forward Skew). Via the SNMP proxy agent (which functions as a
portal to the MIBs), a user is able to receive alarm indications, query for current object values,
and set some object values. To do this, the user requires either a generic SNMP manager called
a Network Management System (NMS) or the ADC Element Management System (EMS), both
of which, in their underlying functions, conform to SNMP specifications. EMS is described in
the next topic.
Figure 5 shows the MIBs used in the Digivance system, and indicates which node type each
MIB is used in and how the MIBs are related to one other. Within the Digivance network, there
are four node types: Hub Node, RAN Node, Location Services Equipment (LSE) node, and
Hubmaster Node. “Node” is simply shorthand for “network node”.
Figure 5. Digivance MIB Structure
In understanding the structure of nodes in the Digivance system, it is important to note that the
Hubmaster node is a regular Hub node with additional functionality that is particular to the one
and only Hubmaster node in the network.
HUBMASTER SNMP AGENT RAN SNMP AGENT
HUB NODE SNMP AGENT
BTS CONNECTION MIB NETWORK NODE MIB
HUB NODE MIB
RAN NODE MIB
TENENT OAM MIB
HUB RF
CONNECTION
MIB
NETWORK
NODE
MIB
NODE
PATH
MIB
NODE
PATH
MIB
EQUIPMENT
MIB
EQUIPMENT
MIB
PATHTRACE
MIB
NODE
PATH
MIB
BIM
MIB
HDC
MIB
HUC
MIB
FSC
MIB
RSC
MIB
SIF/
FIC
MIB
STF
MIB
HRM
MIB
MUC
MIB
*
STF
MIB
GPS
MIB
RDC
MIB
RUC
MIB
GPS
MIB
BACK-
PLANE
MIB
BACK-
PLANE
MIB
POWER
ENTRY
MIB
21026-C
SIF/
FIC
MIB
*
NXD
ONLY