Transition Networks M/GE-PSW-LX-01 - Manual (Page 5)

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M/GE-PSW-xX-01
Tech Support: 1-800-260-1312 International: 00-1-952-941-7600 (24 hours)
Operation -- Continued
Product features -- continued
Automatic link restoration
The media converter will automatically re-establish the link when connected to
switches if the link is lost, even with Auto-Negotiation and Link Pass-through (both
directions) enabled.
Full-Duplex flow control
In a full-duplex network, maximum cable lengths are determined by the type of
cables used—see page 1 (front cover) for M/GE-PSW-xX-01 cable specifications.
The 512-Bit Rule does not apply in a full-duplex network.
Note: Full duplex is ON permanently for the fiber port only.
Half-Duplex flow control (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
Back pressure
Back pressure is used in half duplex mode. It ensures the retransmission of
incoming packets when a port using half-duplex is temporarily unable to receive
incoming frames.
Flow Control
The process of adjusting the flow of data from one device to another ensures that
the receiving device can handle all the incoming data. This is particularly important
where the sending device is capable of transmitting data much faster than the
receiving device can accept it.
[email protected] -- Click the “Transition Now” link for a live Web chat. 9
Operation -- Continued
Product features -- continued
Distance extension
The M/GE-PSW-xX-01 media converters can segment one (1) 10Base-T copper
Ethernet, 100Base-T copper fast Ethernet, or 1000Base-T copper Gigabit Ethernet,
and one (1)1000 Base-X fiber Fast Ethernet collision domain:
In a half-duplex Ethernet or Fast Ethernet environment, the M/GE-PSW-xX-01
media converters extend network distances by segmenting collision domains so that
the 512-Bit Rule applies separately to each collision domain.
In a full-duplex Ethernet or Fast Ethernet environment, the M/GE-PSW-xX-01
media converters extend network distances to the physical cable limitations
imposed by the selected twisted-pair copper fiber cables.
Rate conversion
The M/GE-PSW-xX-01 media converters allow the following connections:
• 10Mb/s devices on a 10Base-T legacy copper network to 1000Mb/s devices on
a 1000Base SX/LX Gigabit Ethernet fiber network.
• 100Mb/s devices on a 100Base-T legacy copper network to 1000Mb/s devices
on a 1000Base SX/LX Gigabit Ethernet fiber network.