Thread: Can I share DISH line with cable modem?

Hi everyone and thanks for your help,

I currently have a cable modem and wireless router upstairs in my house, but I would like to bring it downstairs for a number of reason. I want to set up in my entertainment center and hook it up by splitting/diplexing the cable going to my DISH receiver. I am very unexperienced in these type of matters and would love some help in getting this done correctly!

My dish receiver = VIP 722 DVR - Provides full HD service for my downstairs HDTV and standard definition for an upstairs TV

Currently, the cable comes from the wall, then diplexes (I think) twice as it hooks into the receiver. Here are pictures of the current wiring:


This is the first diplex


This is the 2nd diplex


This is where everything plugs in to the back of the receiver. The VHF/UHF cable from the 1st diplex plugs into the "Home Distribution" slot, The SAT cable from the 1st diplex then diplexes into the "Satellite 1 & 2" cables, which plug into their respective slots.

Here is a very poor diagram

wall cable------Diplex 1>>>>Home Distribution
....................................>>>>Diplex 2>>>>>>Satellite 1
.........................................................>>>>>>Satellite 2

My instinct is that I should be able to do this:
wall cable------Diplex 1>>>>NEW DIPLEX>>>>>Home Distribution
................................................................>>>>>Cable Modem
....................................>>>>Diplex 2>>>>>>Satellite 1
.........................................................>>>>>>Satellite 2

Would that work? What kind of Diplex should I use? Or should I used a splitter?

Please help! If anything needs clarification, just respond and let me know.

Thanks!

PS - If these pictures look humongous, I apologize, I don't know how to fix that!

Diplexers are frequency filters that only pass high frequencies to one output and low frequencies to the other. In your installation they combine and split the TV2 output and the satellite in signals so only one cable is required to the receiver.

Diplexers usually don't work well with cable modems because they filter out frequencies used by the modems.

So are you saying it wouldn't be possible to set up the modem and cable line together?

Originally Posted by longshot270

So are you saying it wouldn't be possible to set up the modem and cable line together?

Exactly. Tech's won't do it because it causes problems for both the internet and the dish signal...If you're moving the modem, have the cable company come out and run a new line ..

With all the wireless options nowadays, why does it matter where the modem is??

The main reason is that I use Vonage for phone and it has to plug in to the router, which is upstairs. I want the phone hub downstairs. I realize there are phone with a 2nd receiver which can be placed anywhere; I actually have this style of phone, but my dog chewed up the downstairs phone : (

Other reasons is that I want to plug my xbox directly into the router and not rely on wireless, and because the wireless signal downstairs is not as strong as I feel it should be, and I hoped that bringing the wireless router downstairs, the signal would improve.

Ok. here's the short short answer...NO!!! Do not do this. It screws with the internet.
Just run a new cable for the modem or the satellite reciver. You pick. WHichever is easier.