Lantronix LTR16T, Руководство по установке

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14 LTR-T Installation Guide
Configuration
The LTR-T has several features, configurable via the front panel:
1. Link test - Enabled on all UTP ports by default, the link test function
continuously checks the ports to verify that a proper connection exists between
each port and the device at the opposite end of the UTP cable. In order for the
link test function to pass, the device at the opposite end of the UTP cable must
support link test functionality. For proper functioning of the network, the link test
function must be disabled on all ports connected to devices that do not support the
link test function.
2. Polarity correction - Enabled on all UTP ports by default, the polarity correction
feature allows the LTR-T to detect reversed receive wires on the UTP cable by
monitoring the polarity of the incoming data. The LTR-T then corrects the
polarity of the data prior to retransmitting it to the other ports. If polarity
correction is not enabled, the LTR-T will neither detect nor correct the polarity of
incoming packets prior to retransmitting them.
3. Manual partitioning - Disabled on all ports by default, manual partition allows
the user to prevent ports from transmitting data to or receiving data from the
attached segment (in effect disabling the port.)
(Note: the LTR-T will automatically partition from the network any port on
which it detects excessive collisions. This is different from disabling a port via
manual partitioning in that auto-partitioned ports are re-instated to the network as
soon as the LTR-T decides that the segment is no longer bad.)
4. Port reconnection - There are two methods by which the LTR-T may determine
when a port should be re-instated after being auto-partitioned. from the network.
By default, all ports are re-instated if the LTR-T is able to receive or transmit data
to an auto-partitioned port without detecting a collision. Optionally, the LTR-T
can be configured to an alternate, more stringent method, in which it reinstates
only those ports to which it is able to transmit data without detecting a collision.
In both cases, the data must be a minimum of 512 bits in length.
The following feature is not controlled via the front-panel buttons:
5. Hub-to-hub interconnection - In many cases it is necessary to interconnect
multiple LTR-Ts to provide more than 8 or 16 UTP connections to the network.
Ports 8 and 16 (LTR16T) are configurable to simplify the cabling effort when
interconnecting LTR-Ts (see the section below on Hub Interconnection.).