Service manual

Appendix C Functional Description C-13
C.1.11 10BASE-T TPE Link Test
This section contains important information for getting your system to communicate
correctly over a 10BASE-T TPE network. If you have no experience with TPE
networks, ask your system or network administrator to perform the procedures in
this section.
Note – This section does not apply to 100BASE-T networks. In such networks, the
link test function must be enabled at both the host and the hub. If your host is
connected to a 100BASE-T network, you must not disable the host link test function.
C.1.11.1 Overview
■ The TPE link integrity test is a function defined by the IEEE 802.3 10BASE-T
specification.
■ For a networked workstation (host) to communicate with a network hub, the link
test state (enabled or disabled) must be the same on the host and hub.
■ If either the host or hub does not share the link test enabled/disabled state of the
other, then the host cannot communicate effectively with the hub, and the hub
cannot communicate effectively with the host.
The following figure illustrates an example of a star configuration local area network
(LAN), showing the host(s)-to-hub relationship.
FIGURE C-5 shows the importance of
ensuring that the host-to-hub link test settings match in a 10BASE-T network.