Triplett TVR10/100/1000 - Manual (Page 22)

Section VI. Performing LAN Tests
What follows are a few examples of using the TVR1000 to perform
typical network troubleshooting. With a little experience, you will be
adding your own new tests. If you are new to LAN testing, please
read the “Introduction”, “The Three Phases of LAN installation”,
Appendix A, Appendix B and Appendix C of this manual. They will
provide you with some basic understanding of LAN networks before
you begin testing.
Two methods of connecting to a LAN device
There are two ways to connect the Main Unit to LAN devices. You
choose the method based on what test it is you wish to perform. If
you wish to test the speed, duplex device type and presence of PoE
on a single port, use the Single Port test. If however, you are trying
to determine the negotiated speed and duplex of two devices or get
two devices to communicate, use the "inline" method.
I. Single port testing: The TVR1000 can be connected to any LAN
device (even when the LAN is operating). When the Main Unit is
connected, it will display the device's Data, Link pulses, Device
Type (hub/switch, PC), Speed, Duplex and presence of PoE.
II. Inserted inline between two LAN devices: The TVR1000 can
be inserted in a LAN segment without disrupting LAN
communications between the two LAN devices. Because the
TVR1000 can display the negotiated speed and duplex of both
devices plus simulate a straight thru or crossover cable
connection, it helps you to quickly sort out many problems. It
also is used as an activity monitor of link pulses, data packets
and as a monitor of the speed, duplex and PoE of the LAN link
without affecting the link. When the TVR1000 is connected inline
between two active devices, the devices negotiate to determine
their common speed and duplex. This is termed "negotiation."
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