CANOGA PERKINS 9120 Gigabit Ethernet Media Converter - Manual (Page 15)

Canoga Perkins
9120 Gigabit Ethernet Media Converter 3-1
Chapter 3
Operation
3.1 LED Indicators
The 9120 Media Converter has eight LED indicators on the front panel (Reference Figure 10).
Figure 11. LED Indicators.
Table 1. LED Descriptions.
LED Indicator Description
PWR Power Indicator - when illuminated green, the 9120 is receiving power.
Extension Port LED Indicators
LNK Extension Port Link - illuminates green when the Extension Port link is good.
When the LED is off, the link is bad. *
Rx Receive data - when illuminated green, the Extension Port is receiving data. ***
Tx Transmit data - when illuminated green, the Extension Port is transmitting data.
When illuminated red, the Extension Port transmitter is is not transmitting (may
be shut down as in a LLF condition). ***
RMTF Remote Fault - This function applies only to the extension port. Upon loss of link
on the extension port, the remote device transmits an RMTF pulse from its Tx
port (the RMTF LED illuminates red on the local device) to the local device
indicating its link loss condition. **
User Port LED Indicators
LNK User Port Link - illuminates green when the User Port link is good. When the
LED is off, the link is bad.
Rx Receive data - when illuminated green, the User Port is receiving data. ***
Tx Transmit data - when illuminated green, the User Port is transmitting data. When
illuminated red, the User Port transmitter is is not transmitting (may be shut
down as in a LLF condition). ***
* When the LNK LED on the Extension Port is off a RMTF signal is forwarded to the remote unit and via a LLF signal
will disable its Extension Port transmitter causing a loss of link integrity at the local device.
** Upon receipt of the RMTF signal, the local unit will illuminate the RMTF indicator and invoke LLF on the local
interface if LLF is enabled and the direction is set to Extension Port to User Port.
*** The 9120 is a transparent device which will detect the presence of any type of packets, data or otherwise, coming
across the data link. This feature may cause the Rx and Tx indicators to illuminate green when data packets are not
transmitted, yet other monitoring information is (e.g., auto negotiation - if this feature is enabled on the equipment
interfacing with the 9120, the Rx and Tx indicators will illuminate green, even when data packets are not transmitted).