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CGETF10xx-1xx
24-hour Technical Support: 1-800-260-1312 International: 00-1-952-941-7600
Operation -- Continued
Remote-Fault Detect (RFD)
Remote-Fault Detect monitors the status of the fiber link. When enabled, remote
fault detection turns off the converter’s fiber transmission when the fiber receiver
goes down. RFD should only be enabled in the remote converter; if enabled in both,
a link pass-through event will cause an unrecoverable condition between the
converters.
Pause
The pause feature can improve network performance by allowing one end of the
link to signal the other to discontinue frame transmission for a set period of time to
relieve buffer congestion.
The pause feature can be set to one of four settings:
•
Disable
(i.e., no pause)
•
Symmetrical pause
•
Asymmetric TX (
transmit)
pause
•
Asymmetric RX
(receive)
pause
Enable the pause feature if it is present on ALL network devices attached to the
media converter(s); otherwise, disable this feature.
Link Pass-Through
The Link Pass-Through feature allows the media converter to monitor both the fiber
and copper RX
(receive)
ports for loss of signal. Refer to the illustration below. For
example, in the event of a loss of an RX signal (1), the media converter will
automatically disable the fiber TX
(transmit)
signal (2), thus, “passing through” the
link loss (3). The far-end device is automatically notified of the link loss (4), which
prevents the loss of valuable data unknowingly transmitted over an invalid link.
AutoCross
(always on)
The AutoCross feature allows either straight-through (MDI) or crossover (MDI-X)
cables to be used when connecting to 10Base-T, 100Base-TX, or 1000Base-T
devices, such as hubs, transceivers, or network interface cards (NICs). AutoCross
determines the characteristics of the cable connection and automatically configures
the unit to link up to its companion device regardless of the cable configuration.
4
1
Media
Converter A
Media
Converter B
Near-End
Device
Far-End
Device
original fault
on the copper link
media converter B
disables the copper link
media converter A
disables the fiber TX link
3
2
media converter B
loses the fiber RX link
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9
Operation -- Continued
Transparent Link Pass-Through
Transparent Link Pass-Through operates similar to Link Pass-Through with one
exception: the fiber link between the converters remains active. A signal is passed
through to the remote converter, causing it to shutdown the copper link, notifying
the end device of the link failure.
Auto-Negotiation
Auto-Negotiation enables automatic configuration to achieve the best possible
mode of operation over a link between devices. A device with this feature enabled
will broadcast its speed
(10Mbs, 100Mbs, etc.)
and duplex
(half/full)
capabilities to
another device with this feature, then negotiate the best mode of operation between
them—no user intervention required.
Fiber Auto-Negotiation
Fiber Auto-Negotiation allows the fiber interface to detect and then advertise the
support capabilities of the remote device. This only occurs when a fiber cable is
connected to a device with a negotiating port.
Loop Back
This diagnostic feature enables the media converter to loop back the signal from the
RX port to the TX port for testing and troubleshooting purposes. Test signals from a
bit-error test unit can then be inserted into either the copper or fiber link to test a
particular segment.
This type of diagnostic test can only be performed from the local to the remote
device with loop back enabled on the remote device.
SNMP
Use SNMP at an attached terminal or at a remote location to monitor the media
converter by monitoring:
•
Copper and fiber link/receive status
•
Hardware switch settings
•
Receive error count
Also, use SNMP to enter network commands that:
•
Enable/disable Remote Fault Fiber Detection
•
Enable/disable Link Pass-Through
•
Enable/disable Auto-Negotiation
•
Symmetric pause
•
Asymmetric TX
(transmit)
pause
•
Asymmetric RX
(receive)
pause
•
Disable pause
See the on-line documentation that comes with Transition Networks FocalPoint™
software for applicable commands and usage.
