Ethernet cable 'splitter': Works on AT@T 'light' modem but not on cable modem. Are splitters speed sensitive

That is not the right way to do it. Connect one computer to the cable modem using an USB A/B cable from the USB port on the modem to an available USB port on the computer and connect the second computer to the modem Ethernet port-to-Ethernet port using an Ethernet cable (probably the modem came with one Ethernet cable).

Hope this helps.

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What is the Time Warner modem? Make, Model? If you have a Ethernet port RJ45 connect the wireless device via a ethernet cable. You may need a splitter if there is only one Ethernet RJ45 port. Example: http://www.amazon.com/StarTech-RJ45-Splitter-Cable-Adapter/dp/B00009XSZE

One port on the splitter is the "input" port -- it connects to the cable wall-jack.
Two (or more) ports on the splitter are the "output" ports; connect one port to the cable-modem, and connect one port to your TV (or Digital TV Terminal).

Note that some OLD splitters are not "two-way" -- any signals going "out" from the cable-modem will not get "through" the splitter to the wall-jack. Be sure that you have a NEW "two-way" splitter.

Had this issue with our local 'Insight' cable company several times, before I replaced our 'consumer-grade' (which had also worked before) splitter with another, better one (with less dB loss!). Went 'round-and-'round with the cable company over this--they tried selling us their modem (ha!), cajoling us about using splitters (uhm, whut?), and trying to blame 'neighborhood signal strength' issues, but the bottom line was, and is, that cable companies dole out signal power just like they do connections--and occasionally (unfortunately) they seem to 'poll' the lines and do some internal accounting to minimize their cost, naming rules they've always had involving 'devices' and such, but the point is to keep your signal going, bugging them less (believe me! dealing with them, hope you can ferret out an 'honest tech' instead of reaching one who is actually a 'scheming seller!')... anyway, after months of dealing with their peppered, dodgy, and questionable 'solutions', I did find that a 'contractor-grade' splitter did the job for us. Never had the issue again, and currently have a two-way splitter on that line. BTW, I just re-read your post, and if you have a 'three-way' splitter or more, try using a two-way, no matter the quality, your signal will depreciate less (signal loss in this case is comparable to losing less water through a pail because it has less holes in its bottom!). Hope this works for you--happy cabling!

You have a signal problem most likely. Too many cable splitters on the line that modem is on, therefore reducing your signal power. An amplifier will not help because most of the time this is an upstream related signal issue. The best thing to do for cable modems is run them a direct line from your de-marc point. This is usually in your basement in some panel (newer homes), or outside where your power and other utilities come in. Just make sure the line running to your modem is off of the very first splitter. For example you would have your main line coming in, go to a 2 way splitter, one leg to the modem, the other leg to a 4 way splitter that powers your 4 tvs in the house.

Of course it could always be the main line to your house is bad, or just that the modem is bad. But honestly - too many splitters and low quality cabling/splitters is 99% of the cause.

The 502 cannot be reset by unplugging it. It has a battery. There is a reset right in the middle on the back. There is a pinhole and you push a toothpick or unrolled paperclip inside the hole and it resets. There are a couple of issues here. Does the EMTA (modem) turn off and reset, knocking you off or does your computer go off while the modem is fine (you will still have phone). If you still have phone then you have another problem. You have a router or a bad ethernet cable. If the modem is going offline I bet you have a splitter on the coax coming into your house. One lead from the splitter goes to your tv and the other your modem. If that is happening it is your splitter. It isnt bad, you just want to re-seat your cables into that splitter. Just undo them, push them in and out of the splitter a few times and your modem will go back online for another year or so

does your router and your landline phone is in one connection in with a splitter..
does connection failed whenever there's a call?
if so your splitter might be broken
or you must insert your phone line with the splitter, it might be in your connection set up..
or make sure your utp cable is stable and not in exposure area of people or pet where it might be touch or something..

hope this helps...

The splitter the technician is referring to goes on the wall jack. One should have come with the "modem" installation package.
Take a regular telephone cord and plug one end into the splitter and the other into the line jack on the Fax/printer.
When your done you should have two phone cords connected to the splitter - one going to the "modem" and the other to the printer.

Your cable signal is low.If you have any splitters remove them.there is only one single cable that should go to the modem out to the box on the house then inside the box the cable for the modem should be on a 2 way splitter, the input is from the cable service, one output goes directly to the modem and the other output usaully goes to another splitter that runs the rest of the TVs in the house.basically the modem needs "priority" or first dibs on the bandwidth coming to the house.