Helpful Links

Diplexer Necessary or Beneficial?


Diplexer Necessary or Beneficial?

Hey everyone,


My setup is as follows: Coax comes from outside my house (presumably from the NID). That coax is attached to a diplexer (VDSL port). Coax goes out from the diplexer (Combined port) to my Residential Gateway. All receivers are connected to the RG via Cat5e, I'm not using coax HomePNA at all.


My question is, since I'm only using coax to get from the NID to the RG, do I need a diplexer or is there any benefit to using one? Should I just use a simple connector instead?


I've been running into some TV stuttering issues recently with uncorrected blocks and starting to ask questions.



Message 1 of 4
ACE - Expert

Re: Diplexer Necessary or Beneficial?

RJ_1 - Since yuo are not feeding any TVs via COAX, there is no need for a diplexer. It is good to minimize components. A straight through barrel connector could provide improvement. A single length of COAX would be even better. I believe cat5 would require a different termination in the NID.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Tags (1)
Message 2 of 4

Re: Diplexer Necessary or Beneficial?

Thanks! Will remove diplexer and go with barrel connector.

Message 3 of 4

Re: Diplexer Necessary or Beneficial?

Make sure if you use a barrel, its rated for 3Ghz as a lower quality barrel will actually cause more issues than the diplexer.  These can usually be identified by a blue center.  As for why there is a diplexer in the network without any of the boxes running on coax, it could be that the tech installed it as a grounding source or reused an exisitng one that was previously installed to feed the signal to that room.  The HPNA side should have at least been capped off though with a 75 ohm terminator. 



I am an AT&T employee and the postings on this site are my own and don’t necessarily represent AT&T’s positions, strategies or opinions.

Employee Contributor*
*I am an AT&T employee and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
Message 4 of 4
Share this topic

Welcome to the internet boards! Check out our troubleshooting articles below and don’t forget to search the forums - your question may have been answered already!

Service acting up? Click here to troubleshoot now!

For DSL related issues. We highly recommend chatting with our teams to address this as quickly as possible.

Additional Support