Question 1

Which side of the PoE injector should this be placed?  On the powered side (between PoE/I and the camera) or between the PoE/I and the router?

Accepted Answer

Man my bad. I though you were looking to buy Ethernet extenders/surge protectors. Yes I use these and the definitely go inbetween the endpoint and the PoE injector/switch. I place mine close to the camera/access point/weather indicators. Hopefully I can delete all that other stuff out.

Question 2

How do you know if it's working properly or not? There are no indicator lights on it. Thanks.

Accepted Answer

This surge suppressor uses fast gas discharge tubes (GDTs) to suppress high energy transients, typically from lightning, but with very low capacitance so as to not affect high speed data circuits (yes this unit works for GigE). The GDTs will show physical damage after a high energy event that leads to failure. Take a look after any lightning hit or nearby hit to your building. However, a series of smaller events may not lead to visible failure, so the unit should be replaced based on an expected frequency of smaller surge events. Note GDTs require high voltage and induced current to trigger, so a close lightning strike (e.g., your backyard) may be one minor GDT event. Check the unit and replace after ~20 such events. A GDT/MOV tester can be purchased, but they are very $$$$ (continuity test is insufficient, you need a breakdown discharge test).  A multimeter continuity test will show open for a good GDT and a typcially failed GDT (failure closed is possible after a severe event in which case damage is visible)  For a typical GDT datasheet see Littlefuse SL1003A Series GDTs here: http://www.littelfuse.com/~/media/electronics/product_catalogs/littelfuse_gdt_catalog.pdf.pdf

Question 3

for poe camera on a tower, how will this be mounted to the tower

Accepted Answer

You should ground the surge protector to your house's common electric ground so mount it as close to your power meter as possible and connect the ground wire there.

Question 4

Are the gas discharge tubes replaceable or must the entire unit be replaced after a strike?  Does Tupavco offer the replacements?

Accepted Answer

The gas discharge tubes are not replaceable. That said, unless the unit takes a direct hit, there is probably no need to replacement. The telephone companies who used to use these to protect lines would leave them in place for years without them loosing effectiveness.

ASIN	B008060BU0
Antenna Type	Internal
Best Sellers Rank	#42,009 in Electronics ( See Top 100 in Electronics ) #313 in Surge Protectors
Brand	Tupavco
Built-In Media	Surge Protector (1)
Color	Grey
Compatible Devices	computer, modem, router, switch
Connectivity Protocol	Ethernet, Internet
Connectivity Technology	Ethernet
Controller Type	Switch
Coverage	Electrical Surges (Lightning, Voltage Spikes, PoE Overvoltages) and Outdoor Networking Equipment
Customer Reviews	4.3 out of 5 stars 162 Reviews
Data Transfer Rate	1000 Megabits Per Second
Frequency	5 GHz
Frequency Band Class	Single-Band
Global Trade Identification Number	00741360887831
Has Internet Connectivity	Yes
Has Security Updates	No
Is Modem Compatible	Yes
Item Type Name	Tupavco Outdoor Ethernet Surge Protector PoE+ Gigabit - Gas Discharge Tube GDT -Wall Mount -RJ45 Lightning Suppressor -LAN Network CAT5/CAT6 Thunder Arrestor -GbE 1000 Mbps Protection -Lock Box -TP303
LAN Port Bandwidth	10/100/1000 megabits_per_second
Manufacturer	Tupavco LLC
Maximum Upstream Data Transfer Rate	1000 Megabits Per Second
Mfr Part Number	TP303
Model Name	TP303
Model Number	TP303
Number of Ports	4
Operating System	ZyNOS
Other Special Features of the Product	Gigabit GbE Transfer 10/100/1000, PoE Power Over Ethernet
Router Network Type	Wired
Security Protocol	WEP
Special Feature	Gigabit GbE Transfer 10/100/1000, PoE Power Over Ethernet
UPC	741360887831
Unit Count	1 Count
Voltage	60 Volts (DC)
Warranty Description	30 days warranty against manufacturer defects/1 year parts and labor
Wireless Communication Standard	802.11ac
Wireless Compability	802.11ac

Ethernet Surge Protector -Outdoor- for PoE+ Gigabit 1000Mbs - RJ-45 LAN Network Thunder Lightning Surge Protection Suppressor/Arrester - TP303

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