Does this measure distance to short or open ?

Yes, it can measure distance to short and open.

Can this unit speed test a cable? 100mbs? 1000mbs?

Hi,network cable tester AT278 can not speed test a cable on 100mbs or 1000mbs.

Will this work with tracing cables that are in a POE switch without burning out the tester?

Manual does not recommend using this with POE

Does this test for cable signal? like 100 or 1000 mbit?

I think so, but I'm not 100% on that. I use mine mostly to check for fault types, and distance from end to fault location. You should read the spec and data sheets to see if that is listed.

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Brand	NOYAFA
Power Source	Battery Powered
Style	Digital
Color	NF-8601W
Item Weight	1.02 Kilograms
Min. Operating Voltage	9E+1 Volts
UPC	889327017836
Manufacturer	Noyafa
Part Number	RAT226-C-1
Item Weight	2.24 pounds
Package Dimensions	10.79 x 7.99 x 3.74 inches
Item model number	NF-8601S
Batteries	1 Lithium Ion batteries required.
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No
Battery Cell Type	Lithium Ion

NOYAFA Network Cable Tester, AT226-C NF-8601W LAN Ethernet Cable Tester RJ45 UTP STP Diagnose Tone Tracer Network Cable Length Tester for RJ45, RJ11, BNC, PING/POE 8 Identifier Telephone Wire Tracker

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