SNMP MIB Objects
E-16 3166-A2-GB20-10November 1998
General Port Table – “rs232PortType” Object (rs232PortEntry 2)
This object is used to identify the port’s hardware type. Only the following values
are supported by the DSU/CSU.
rs422(3) – Used to identify a synchronous data port that is configured as
EIA-530A or RS-449.
V35(5) – Used to identify a synchronous data port that is configured as V.35.
General Port Table – “rs232PortInSigNumber” Object (rs232PortEntry 3)
This object contains the number of input signals contained in the input signal
table. This is the number of signals that can be detected. This number is 2 for the
synchronous data port.
General Port Table – “rs232PortOutSigNumber” Object (rs232PortEntry 4)
This object contains the number of output signals contained in the output signal
table. This is the number of signals that can be asserted. This number is 2 for the
synchronous data port.
General Port Table – “rs232PortInSpeed” Object (rs232PortEntry 5)
This object contains the port’s input speed in bits per second. For the DSU/CSU,
the rs232PortInSpeed object has the same value as the rs232PortOutSpeed
object. The input speed of the synchronous data port is determined by the
channel configuration and cannot be changed through this object. Thus, for the
synchronous data ports, this object is read-only.
General Port Table – “rs232PortOutSpeed” Object (rs232PortEntry 6)
This object contains the port’s output speed in bits per second. For the
DSU/CSU, the rs232PortInSpeed object has the same value as the
rs232PortOutSpeed object. The input speed of a synchronous data port is
determined by the channel configuration and cannot be changed through this
object. Thus, for the synchronous data port, this object is read-only.
Asynchronous Port Table, RS-232-like MIB
The asynchronous port table contains an entry for the COM port when the port is
configured for asynchronous operation. For the DSU/CSU, the entries in the table
that are counters (rs232AsyncPortEntry 6–8) are used to collect statistics and are
not supported.
Asynchronous Port Table, “rs232AsyncPortBits” (rs232AsyncPortEntry 2)
This object specifies the number of bits in a character. Only the following values
are supported by the DSU/CSU.
7 – 7-bit characters.
8 – 8-bit characters.