SNMP (Simple Network Management Protocol)
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SNMP (Simple Network Management Protocol)
An SNMP agent is integrated into IP telephones. This allows you to access telephone
data via the SNMP protocol. These data are organised using the MIB (Management
Information Base) tree structure.
The SNMP agent from WindManage SNMP is integrated into the IP phone. This agent
•
implements the SNMP protocol completely
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saves and retrieves data from the MIB
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can signal incoming events to the manager
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receives packets from an NMS via the UDP level of a network connection
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accepts a received packet, decodes it and translates it from ASN.1 into a C
structure
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this structure is executed and a response generated. This response is coded
and packed in ASN.1
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the packet is then returned to the NMS via the UDP connection.
The definitions of the MIB correspond to the SMI standard RFC 1155. MIB-I and MIB-II
are defined in RFC 1156 and RFC 1213.
The IP phone does not however support the MIB II standard. Specific objects are
defined in a private Tenovis MIB and made available. These objects have read-only
access. They are listed in the following table. Limitations are due to chip hardware.
The SNMP agent in the telephone can be accessed using various tools (HP OpenView,
for example). Each tool has its own way of displaying the telephone data obtained.
Objects
Description
IP
telephone
LAN
port
PC
port
Phone
port
Access
systemUpTime
The time (in minutes) since
the network management
portion of the system was
last re-initialized
x
Read
SystemContact
The textual identification of
the contact person for this
managed node, together with
information on how to
contact this person
x
Read
systemName
An administratively-assigned
name for this managed node
x
Read
Summary of Contents for T3 Comfort
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