Operation
-- Continued
Full-duplex network
In a full-duplex network, maximum cable lengths are determined by the type
of cables that are used. See page 1
(front cover)
for the cable specifications
for the different CFETF1029-2xx models.
The 512-Bit Rule does not apply in a full-duplex network.
Pause control frame
The pause control 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.
Note:
If the pause control feature is present on ALL network devices attached
to the media converter(s), enable the pause control feature on the media
converter(s). Otherwise, disable the pause control feature
(see page 2).
Link Pass-Through
When the Link Pass-Through feature is activated
(see page 2),
it allows the
media converter to monitor both the fiber and copper RX
(receive)
ports for
loss of signal. In the event of a loss of an RX signal (1), the media converter
will automatically disable the 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.
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).
CFETF1029-2xx
6
24-hour Technical Support: 1-800-260-1312 International: 00-1-952-941-7600
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
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
[email protected] -- Click the “Transition Now” link for a live Web chat.
7
Cable Specifications
Copper cable
Category 5:
(
minimum requirement)
Gauge
24 to 22 AWG
Attenuation
22.0 dB /100m @ 100 MHz
Maximum Cable Distance
100 meters
• Straight-through OR crossover twisted-pair cable may be used.
• Shielded twisted-pair OR unshielded twisted-pair may be used
• Pins 1&2 and 3&6 are the two active pairs in an Ethernet 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.
Crossover Cable
1
2
3
6
Straight-Through Cable
Twisted Pair #1
Twisted Pair #1
Twisted Pair #2
Twisted Pair #2
1
2
3
6
1
2
3
6
1
2
3
6
Operation
-- Continued
SNMP
See the on-line documentation that comes with Transition Networks
FocalPoint™ software for applicable commands and usage.
Use SNMP at an attached terminal or at a remote location to monitor the media
converter by monitoring:
•
Media converter power
•
Copper link and fiber link status
•
Twisted-pair cable length
•
Hardware switch settings
•
Fault condition
Also, use SNMP to enter network commands that:
•
Enable/disable full- / half-duplex
•
Enable/disable Link Pass-Through (LPT)
•
Enable/disable Far-End Fault (FEF)
•
Enable/disable pause
•
Enable/disable AutoCross
•
Power down the media converter
