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.

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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