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13
CGFEB1xxx-1xx
Diagnostic Monitoring Interface (DMI)
The following DMI port screen and explanation table contains brief definitions of the
DMI support offered on Transition Networks SFP optical interfaces. For further
information, please see the help option on the CPSMM-xxx SNMP agent or Focal
Point, Transition Networks' GUI.
Variable Name
Description
DMI Rx Power
Measured Receive optical power in microwatts and in
decibels relative to 1mW.
DMI Rx Power Alarm Alarm status of measured Receive optical power.
DMI Temp
Internally measured temperature of transceiver in degrees C
and degrees F.
DMI Temp Alarm
Alarm status for internally measured temperature of
transceiver.
DMI Bias Current
Measured transmit bias current in microamperes.
DMI Bias Alarm
Alarm status for measured transmit bias current for the
interface.
DMI Tx Power
Measured transmit power, in microwatts and in decibels
relative to 1mW..
DMI Tx Power Alarm Alarm status of measured transmit power.
Rx Power Intrusion
Threshold
Instructs the converter to stop passing traffic when the
receive power drops below the new threshold. This feature
is sometimes referred to as 'Intrusion Detection,' since
tapping into a fiber to intercept traffic leads to a reduction
in receive power. This value can be entered in microwatts
or in decibels relative to 1mW.
Note:
This feature is not available on all devices.
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CGFEB1xxx-1xx
24-Hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
Operations -- continued
Product features -- continued
Port-Based VLAN
Allows secure traffic forwarding in one direction only.
RMON Counter on each port
RMON statistics such as packet-size counters, collision errors, and packet type are
kept for each port.
Switch selectable speed
On UTP when Auto-Negotiation is disabled the speed can be set in either software
or hardware mode.
Automatic link restoration
The converter will automatically restore the link between networked devices after a
fault condition has been corrected. Competitors’ products, in contrast, require the
user to power down, then power up the converters after a fault condition has been
corrected.
Far-end fault
When a fault occurs on an incoming fiber link (1), the media converter transmits a
Far-End Fault signal on the outgoing fiber link (2). In addition, the Far-End Fault
signal also activates the Link Pass-Through, which, in turn, disables the link on the
copper portion of the network (3) and (4).
Far-End Fault
signal is sent
Media
Converter A
Media
Converter B
Near-End
Device
Far-End
Device
original fault
on the fiber link
media converter B
disables the copper link
media converter A
disables the copper link
3
4
2
1
