RJ45 Ports

Linksys / Befcmu10 ver 2
November 9, 2009 at 05:46:18
Specs: Windows Vista
I have comcast modem which has only one RJ45 Port. I need atleast 2 ports - one for the wireless router for my laptop and other port for VOIP Adapter. How do i solve this issue? Should I use the Ehternet Hub or splitter? Please suggest.

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November 9, 2009 at 06:18:43

Does you wireless router have some Ethernet RJ45 connections. If so use one of them.

The next option is a small hub connected to the modem, and the wireless router and VOIP connected to the hub. The smallest hubs these days have four of five ports.

For your use a standard 10/100 hub will do the job.

You will also see small 10/100 switches. These are usually more expensive, but they have more logic built in to them to direct network traffic.


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November 9, 2009 at 06:27:32
Thanks for your reply.

Yes. The modem has one RJ45 connection. I need atleast 2 RJ45 one for wireless router and other for VOIP Adapter. I tried Modem -> Wireless Router -> VOIP Adapter. This is not working. I am getting dial tone on the VOIP but not able to make outgoing or incoming calls. Something is blocking my VOIP. I think i will go ahead and get an RJ45 Hub.

Thanks so much.

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November 9, 2009 at 06:54:39

If VOIP was not working when connected through the wireless router, it was likely due to the settings in the wireless router.

I am not familiar with the ports used by VOIP, but somewhere in the documentation it will tell you which ports need to be open, (and for which protocol TCP /UDP).

Many routers can be accessed from a web browser, and ports can be opened for specific types of traffic.

Remember that your router acts as a firewall, so don't connect any PC's between your DSL modem and your router.


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November 9, 2009 at 07:02:46
Great. Thank you.

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