Cable Specifications; Copper Cable; Fiber Cable - Transition Networks CFETF1011-110 User Manual

CFETF10xx-110
Operation
-- Continued
Link Pass-Through
When the Link Pass-Through feature is activated (see page 2), the media converter
monitors 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.
local converter sends a
loss signal over the fiber link
Local
Near-End
Media
Device
Converter
1
original fault on the
Ethernet copper link
fiber link is still valid
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
CFETF10xx-110 models.
The 512-Bit Rule does not apply in a full-duplex network.
Half-Duplex Network (512-Bit Rule)
In a half-duplex network, the maximum cable lengths are determined by the round trip
delay limitations of each Fast Ethernet™ collision domain. (A collision domain is the
longest path between any two terminal devices, e.g. a terminal, switch, or router.)
The 512-Bit Rule determines the maximum length of cable permitted by calculating
the round-trip delay in bit-times (BT) of a particular collision domain. If the result is
less than or equal to 512 BT, the path is good.
For more information on the 512-Bit Rule, see the white paper titled "Collision
Domains" on the Transition Networks website at: www.transition.com.
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24-Hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
Remote
2
Far-End
Media
Device
Converter
3
4
remote converter disables
the Ethernet copper link
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
• Hardware switch settings
• Fault condition
Also, use SNMP to enter network commands that:
• Enable/disable full-/ half-duplex
• Enable/disable Link Pass-Through (LPT)
• Power down the media converter

Cable Specifications

Copper Cable

Category 5:
Gauge
Attenuation
Maximum Cable Distance
• Straight-through (MDI) or crossover (MDI-X) twisted-pair cable may be used.
• Shielded (STP) or unshielded (UTP) twisted-pair cable 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.
Straight-Through Cable
1
1
Twisted Pair #1
2
2
3
3
Twisted Pair #2
6 6

Fiber Cable

The physical characteristics must meet or exceed IEEE 802.3™ specifications.
Bit Error Rate:
Single mode fiber (recommended):
Multimode fiber (recommended):
Multimode fiber (optional):
techsupport@transition.com -- Click the "Transition Now" link for a live Web chat.
24 to 22 AWG
22.0 dB /100m @ 100 MHz
100 meters
Crossover Cable
1 1
Twisted Pair #1
2 2
3 3
Twisted Pair #2
6 6
<10-9
9 µm
62.5/125 µm
100/140, 85/140, 50/125 µm
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