Operation - Continued
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.
| | | media converter A | | | media converter B | | |
| | disables the fiber TX link | loses the fiber RX link | | |
| Near-End | | | Media | | | 2 | 3 | | Media | | | Far-End | |
| | | | | | | | | |
| Device | 1 | | Converter A | | | | | | Converter B | 4 | | Device | |
| | | | | | | | | | | | |
| original fault | | | | | | | media converter B |
| on the copper link | | | | disables the copper link |
| | | | | | | | | | | | | | |
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 abilities of the remote device. It is supported only when the fiber 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
Note: SNMP is not supported in the MC-1.
Cable Specifications
The physical characteristics must meet or exceed IEEE 802.3™ specifications.
Fiber cable
Bit Error Rate: | <10-9 | |
Single mode fiber (recommended): | 9 µm | |
Multimode fiber (recommended): | 62.5/125 µm | |
Multimode fiber (optional): | 100/140, 85/140, 50/125 µm |
BSS Audio MC-1 | 1310 nm single mode |
Fiber-optic Transmitter Power: | min: -9.5 dBm | max: -3.0 dBm |
Fiber-optic Receiver Sensitivity: | min: -20.0 dBm | max: -3.0 dBm |
Link Budget: | 10.5 dB | |
Copper cable (Category 5 -- minimum requirement)
•Gauge = 24 to 22 AWG; Attenuation = 22.0 dB /100m @ 100 MHz
•Straight-through OR crossover cable may be used.
•Shielded twisted-pair (STP) OR unshielded twisted-pair (UTP) may be used
•All pin pairs (1&2, 3&6, 4&5, 7&8) are active in a gigabit network.
•Use only dedicated wire pairs for the active pins; e.g., blue/white & white/blue, orange/white & white/orange, etc.
•Do not use flat or silver satin wire.
