Allied Telesis AT-PBC18 - Manual (Page 46)

Installing a Media Converter Module
46
Table 2 lists the pinouts of the RJ-45 ports for both MDI and MDI-X wiring
configurations.
Table 2 RJ-45 Pinout
Link Test/
MissingLink
The Link Test/MissingLink (LT/ML) button or switch, depending on your
module, allows you to perform a link test on the media converter ports
and to activate the MissingLink feature on the unit. Both features are
describe in the following section.
Link Test
The link test is a fast and easy way for you to test the connections
between the media converter ports and the end-nodes that are
connected to the ports. If a network problem occurs, you can perform a
link test to determine which port is experiencing a problem, and be able
to focus your troubleshooting efforts on the cable and end-node where
the problem resides.
A link test is performed when the LT/ML button or switch is in LT
position. For instructions on performing a link test, refer to
Troubleshooting on page 99.
Note
Performing a link test does not interfere with a media converter’s
ability to pass network traffic, except for the AT-PB1000 Series
modules.
MDI MDI-X
Pin Signal Pin Signal
1 TD + 1 RD+
2 TD- 2 RD-
3 RD+ 3 TD+
6 RD- 6 TD-
4, 5, 7, 8 N/A 4, 5, 7, 8 N/A