Can someone explain the difference between these Ethernet surge protectors???

[MWink]

I've gone from somewhat confused to completely . APC has a bunch of different surge protectors which are supposed to protect network lines but they are all made different. I don't understand how they can protect the same thing while using seemingly very different components.

I took some pics of them. Could someone explain how each works (what those components are supposed to do)? I originally thought those MOV-like things were the real surge protection components however the PNET1 does not have ANY.

Here are the pics:
PNET1 Top view PNET1 Side view - This one is designed for 10/100 baseT/TX protection.

PDIGITEL Top view PDIGITEL Side view - This one is designed for T1 or ISDN lines (it looks like it has the best protection to me?)

Back-UPS Pro 650 - This is the Ethernet or phone line protector taken out of a Back-UPS Pro 650. It looks like a 1 line phone protector ONLY to me???

So, can anyone explain them to me? Also I thought T1 and Ethernet were similar (shouldn't they use the same surge protector?)

BTW, I asked APC and they refused to comment. I just realized this probably should have gone in Highly Technical.

 

[MWink]

bump

 

[Viper GTS]

The components look pretty similar to me, but I'm no expert.

As far as T1 vs ethernet, they are in no way related.

Viper GTS