Tripp-Lite surge supressor blocks Modem DOCSIS 3.0 mode

D

Deadjasper

2[H]4U
Joined
Oct 28, 2001
Messages
2,592
Modem is a Motorola SB6141. Running the RJ45 cable through it knock throughput down to 100mbs as per the light on the front of the modem (it's amber). Not running through the Tripp-Lite it's blue (DOCSIS 3.0 mode).

So, my question is. What kind of surge protector do I need that doesn't affect my spped but yet still protects?

Thanks
 
Deadjasper said:
Thanks. The problem is with the RJ45 plugs, not coax.
Click to expand...

Then why did you say "blocks Modem DOCSIS 3.0 mode"? The ethernet jack has nothing to do with the docsis mode the cable modem runs at. You'll have to buy something like this as almost all of the cheap surge suppressors block gigabit.
 
As an Amazon Associate, HardForum may earn from qualifying purchases.
Duh, apparently it does because when I plug the NETWORK (RJ45) cable directly into the router the light turns blue. Going through the surge it's amber.
 
That is because the rj45 is being limited to FE instead of hitting GE. Has nothing to do with docsis which is between the modem and the provider.

Shouldn't be a turd when people are trying to help you and you are the one that is in the wrong.
 
Deadjasper said:
Thanks. The problem is with the RJ45 plugs, not coax.
Click to expand...

"DOCSIS 3.0" refers to how the modem talks with the ISP, this is only done via coax.

The blue/green LED on your modem refers to how the modem is talking with the router or your PC. Green is 100 megabit and blue is 1000 megabit link speed.

These two things are completely unrelated.
 
*shakes head*

Why aren't you just running the switches and computers on surge suppressors, instead of running the Ethernet cabling through suppressors? I must be missing something here.
 
Last summer I got hit and it took out most of my Ethernet equip. including several builtin NIC's and 2 switches. I figured it had to have come in through the cable modem (took it out too) and then into the lan via the router. One 8 port Netgear switch actually lost all of it's smoke.

With summer approaching and already having been through a couple of thunderstorms, I'd like to do all I can to prevent a repeat of last summer.
 
As an Amazon Associate, HardForum may earn from qualifying purchases.
Got http://www.amazon.com/Leviton-51120...18&sr=8-3&keywords=whole+home+surge+protector after a few lightning strikes near the house, still use plug in suppressors for computers and such but gives added protection for, well, everything. Not had any trees in the yard get hit and blow up like that one time we lost 2 TVs but strikes like that can blow up stuff on suppressors anyway since the EMP can induce spikes in things that you'd never try to protect anyway like audio and video cables.
 
As an Amazon Associate, HardForum may earn from qualifying purchases.
Last summer a tree in the back yard got hit. Killed the tree and a bunch of stuff in the house. I've been paranoid since then. I've got most electronic stuff on surge protectors but nothing on the network yet. Hope they arrive from Amazon before I need them.
 
The best surge suppressor for a network is a fiber optic media converter. A near hit from lightning will travel over everything, but a good UPS, and using fiber to isolate your network from your ISP would help a lot.
 
If your switch has an SFP port and a compatible fiber SFP module, then yes.
 
You'd need two of those for each cable run + two short Ethernet jumpers on each end + the fiber to run between them + a power brick on each end. In the end you're going to spend over $100 for each run of cable and have a pile of media converters and power bricks around your switch (or just buy an optical switch, which after SFP's would probably cost even more).

In the end you'll end up paying enough that you'd be able to replace your existing equipment numerous times on the off chance lightning does strike near you again.

Basically you're being silly. Surge suppress major electronics same as you ever would, and let your homeowners or renters insurance take care of the rest past the deductible.
 
Deadjasper said:
Something like this?
Click to expand...
Did you really think centimter parts in that converter would stop what three miles of sky could not? Your assumption. Another discussed how surges (even on ethernet) are averted. But even that first recommended device on coax is made irrelevant by what should already exist - as installed by the cable company and required by regulations.

Any protector at an ethernet port must either block or absorb a surge. Any recommendation also says how it blocks that surge or how many joules it will absorb. Destructive surges are hundreds of thousands of joules. Protection always means one knows where that energy dissipates.

Once inside a building, no adjacent protector does or claims to protect from that type of surge. A surge on ethernet is only averted if connected low impedance (ie 'less than 10 feet') to earth ground BEFORE entering the building. That is where ethernet protection is installed - on the coax cable.

Numerous other considerations should be learned. Howvever, one reliable reply recommended where a surge is earthed so that robust protection on all ethernet ports is not overwhelmed. That is not connected to ethernet wires by devices that do too little too late. And do not have what is most important: a low impedance (ie 'less than 10 foot') connection to earth.
 
westom said:
Did you really think centimter parts in that converter would stop what three miles of sky could not? Your assumption. Another discussed how surges (even on ethernet) are averted. But even that first recommended device on coax is made irrelevant by what should already exist - as installed by the cable company and required by regulations.

Any protector at an ethernet port must either block or absorb a surge. Any recommendation also says how it blocks that surge or how many joules it will absorb. Destructive surges are hundreds of thousands of joules. Protection always means one knows where that energy dissipates.

Once inside a building, no adjacent protector does or claims to protect from that type of surge. A surge on ethernet is only averted if connected low impedance (ie 'less than 10 feet') to earth ground BEFORE entering the building. That is where ethernet protection is installed - on the coax cable.

Numerous other considerations should be learned. Howvever, one reliable reply recommended where a surge is earthed so that robust protection on all ethernet ports is not overwhelmed. That is not connected to ethernet wires by devices that do too little too late. And do not have what is most important: a low impedance (ie 'less than 10 foot') connection to earth.
Click to expand...

The "centimter parts" in that converter are going to do nothing to stop the surge, its the 5 feet to 550 feet of glass after the converter that stops the surge....

Nothing will protect you from a "near miss", but glass will at least insulate one potential vector.
 
wizdum said:
The "centimter parts" in that converter are going to do nothing to stop the surge, its the 5 feet to 550 feet of glass after the converter that stops the surge....
Click to expand...
That means every connection into an appliance must have 5 to 550 feet of glass. How does glass power it? It doesn't.

Only assumed was a coax cable, with required effective protection, was an incoming current path to an ethernet port. OK. To have damage, some other outgoing path must also exist. Otherwise no electricity (the surge) exists. What was that other outgoing path to earth? Useful replies answer that question.

Most surges are incoming on AC mains (that cannot connect via glass). A better outgoing path to earth is via an ethernet port, modem, and its coax cable. Damage is often on a weakest connection in that outgoing path - ie the ethernet port. Next time, a surge incoming on AC mains will find another destructive paths - ie outgoing via USB devices. Then the USB port is also damaged. Damage directly traceable to not first learning what was well understood even 100 years ago.

Direct lightning strikes without damage has been routine for well over 100 years. No damage even to a protector. Tiny indirect surges are also made irrelevant - even by protection routinely found in every ethernet port.

Protection means unlearning myths promoted by advertising and hearsay. By learning what was well understood over 100 years ago. Long before semiconductors existed, direct lightning strikes did no damage. Useful recommendation also says where hundred of thousands of joules harmlessly dissipate. Routine is direct lightning strikes without damage. But only when one first learns well proven concepts. And by ignoring any recommendaton not tempered by numbers.

Direct lightning strikes to electronics atop the Empire State Building without damage were 23 times annually. And still hearsay claims nothing can avert damage. How do we separate those who know from others who only learn hearsay? Protectoin is always about where hundreds of thousands of joules harmlessly dissipate. Then no damage even from a direct lightning strike. A minimal protector is 50,000 amps so that even direct lightning strikes cause no damage. An informed homeowner spends about $1 per protected appliance.

Others who wasted money on near zero protectors will then assume nothing can prevent lightning damage. Franklin demonstrated direct strikes without damage in 1752.
 
westom said:
That means every connection into an appliance must have 5 to 550 feet of glass. How does glass power it? It doesn't.

Only assumed was a coax cable, with required effective protection, was an incoming current path to an ethernet port. OK. To have damage, some other outgoing path must also exist. Otherwise no electricity (the surge) exists. What was that other outgoing path to earth? Useful replies answer that question.

Most surges are incoming on AC mains (that cannot connect via glass). A better outgoing path to earth is via an ethernet port, modem, and its coax cable. Damage is often on a weakest connection in that outgoing path - ie the ethernet port. Next time, a surge incoming on AC mains will find another destructive paths - ie outgoing via USB devices. Then the USB port is also damaged. Damage directly traceable to not first learning what was well understood even 100 years ago.

Direct lightning strikes without damage has been routine for well over 100 years. No damage even to a protector. Tiny indirect surges are also made irrelevant - even by protection routinely found in every ethernet port.

Protection means unlearning myths promoted by advertising and hearsay. By learning what was well understood over 100 years ago. Long before semiconductors existed, direct lightning strikes did no damage. Useful recommendation also says where hundred of thousands of joules harmlessly dissipate. Routine is direct lightning strikes without damage. But only when one first learns well proven concepts. And by ignoring any recommendaton not tempered by numbers.

Direct lightning strikes to electronics atop the Empire State Building without damage were 23 times annually. And still hearsay claims nothing can avert damage. How do we separate those who know from others who only learn hearsay? Protectoin is always about where hundreds of thousands of joules harmlessly dissipate. Then no damage even from a direct lightning strike. A minimal protector is 50,000 amps so that even direct lightning strikes cause no damage. An informed homeowner spends about $1 per protected appliance.

Others who wasted money on near zero protectors will then assume nothing can prevent lightning damage. Franklin demonstrated direct strikes without damage in 1752.
Click to expand...

Now you're being purposefully argumentative. I'll leave this to your expert advice. Peace.
 
wizdum said:
Now you're being purposefully argumentative. I'll leave this to your expert advice. Peace.
Click to expand...
When basic facts are too difficult, then attack the messenger with rhetoric.. One fact is irrefutable. Direct lightning strike without damage is routine. A fact so well proven that damage from direct strikes is often traceable to human failure.

Defined was how informed homeowners obtain proven protection for about $1 per protected appliance. Understood even before computers existed.

Dragon demonstrated two examples of this proven technology recommended for the OP. Both solutons are necessary to protect ethernet ports. wizdum posts empty denials. Without any reason to believe his denials.

Long before 5 or 550 foot glass fibers existed, protection from 23 direct strikes annually was routine atop the Empire State Building. Dragon posted examples of how homeowners can install same.
 
Oh my, they're all out of the asylum today it seems. Glass not conducting electricity is exactly the point, google opto-isolation.
 
bmh.01 said:
Oh my, they're all out of the asylum today it seems. Glass not conducting electricity is exactly the point, google opto-isolation.
Click to expand...
For glass to insulate electronics, then glass must somehow power that electronics. The point was obvious to anyone who is thinking. If all wires are not glass (and they must be to provide that protection), then fiber does not provide protection. How does glass power its electronics? It doesn't. Only cables, that connect a surge destructively into electronics, power those electronics.

Protection for RJ-45 is well proven by technology proven generations before ethernet existed. But not understood by many only educated by hearsay. Protection must exist on the incoming coax cable where it enters a building. And on every other conductor entering that building. Protector on ethernet will degrade ethernet signals. And do almost nothing for protection.
 
You must log in or register to reply here.
Back
Top