CANOGA PERKINS 9119 Rack Mount 100BASE-TX/FX Media Converter - Manual (Page 18)

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Canoga Perkins 9119 Media Converter
This feature is equally supported on the following configurations:
•
9135/9140 & 9135/9140
•
9135/9140 & 9119
This feature is enabled by default on all 9119 converters and its functionality cannot be inactivated.
Link Loss Forwarding (LLF) - (There is no LED indicator associated with this functionality):
This feature is supported by the UTP 10 or 100Mbps Ethernet interface. Upon loss of link integrity on a fiber optic interface
port (possibly due to a loss of signal from a remote unit), the UTP interface port subsequently shuts off. The link loss status
is thereby forwarded to the downstream DTE device. This results in a forced failure on the downstream UTP port which also
loses link integrity. In the event the DTE device is an SNMP managed device, it will emit a TRAP to the NMS trap host
indicating that the UTP port is "down" or lost link integrity.
This feature has been added on all 8829 and 9119 devices and cannot be disabled.
LNK 100BASE-TX / Interface Integrity
(UTP) Indicator (Green)
When lit, LNK indicates that a modulated signal of sufficient amplitude is being received by the UTP interface.
3.2 Loss Budget
A Loss Budget reflects the difference between a transceiver's Average Transmit Power and its Average Receiver Sensitivity.
The loss budget for the 9119 Media Converter varies with its type as is shown below.
Loss Budgets (Guaranteed. Typically 2db greater)
•
100BASE-FX 1310nm Multimode (MM) LED (11dB loss budget)
•
100BASE-FX 1310nm Single Mode (SM) LP Laser (10dB loss budget)
•
100BASE-FX 1310nm Single Mode (SM) LD Laser (26dB loss budget)
•
100BASE-FX 1550nm Single Mode (SM) XD Laser (26dB loss budget)
3.2.1 100BASE-FX 1310nm Multimode (MM) LED
The 9119 100BASE-FX Media Converter features a minimum Average Transmit Power of -20dBm and a minimum Aver-
age Receiver Sensitivity of -31dBm, assuming 62.5
µ m core (Multimode) fiber. This yields a maximum loss budget of
11dB, per ANSI X3.166 and ISO/IEC 9314-3.
The general rule when figuring total link loss; allow 0.5dB per connector (devices and patch panel connections) plus 4dB
per km attenuation on 62.5/125 micron cable.