CAT 5 wiring Ethernet and VoIP question?

[13ucci]

I recently bought a house that has CAT 5 cables running throughout the house. My network setup consists of a modem a router for wifi and another router for VoIP (T-mobile grandfathered plan). The two VoIP router is currently connected to the first router, which is then connected to the modem, that is connected to a Coax cable (the tv cable). I managed to connect a line from the VoIP router to a phone line plate on the wall. This allowed me to connect other phone bases to it to establish a phone line. So I decided to look inside one of these plates in the wall and noticed that only the blue and white cables are connected to the phone line. The other 6 cables are doing nothing. (green/green-white, orange/orange-white, brown/brown-white,*initial blue/blue-white). So I thought can I do the same thing that I did with the VoIP router as I can do to the main wifi router. My question is that can I connect a Ethernet cable from my main wifi router to the plate on the wall where the phone line is at (which would require me to make a plug for it) (get a kit that clamps all the wires to make it.) (then get a plate to connect the two by hiding the wire in the wall). If I am not mistaken, is it possible if I could run the “internet” though the same line as the phone line? Would anything interfere? I will try to represent it as close to as possible in this diagram.

PIC

Again thank you for the help

 

[jimmysmitty]

No you can't split it that way. When it is running as CAT5 it will use all 4 pairs and any other signal running on it will just interfere and cause issues. You need a separate cable for both lines.

 

[casey_souder]

As long as you don't plan on running gigabit ethernet, you should be able to. 100BASE-TX only uses pairs 2 and 3 of cat5. In theory cat5 can run 4 phone lines, 2 100BASE-TX connections, 2 phone lines and 1 100BASE-TX, or a gigabit connection.

Just make sure you get pairs matched up right on each end. I would hate to see what the voltage of telephone ring would do to computer equipment.

 

[Solandri]

Yeah, casey_sounder is correct. 100bT (100 Mbps) only needs 2 pairs. It's commonly used that way for PoE devices (power over ethernet).

The wiring for it isn't exactly intuitive. And it may take you a couple tries to get it right.

http://www.siemon.com/us/standards/images/13-25_common_outlet_configurations_1--100baset.gif

You can also get a two-hole keystone wall plate and the appropriate keystones for phone and ethernet, for a neat presentation at the wall.

http://www.monoprice.com/product?p_id=6727
http://www.monoprice.com/product?p_id=6728

And a bracket to attach it to the wall.

http://www.monoprice.com/product?p_id=7013

A RJ-11 keystone for the phone.

http://www.monoprice.com/product?p_id=7288

You could save a few cents by getting Cat 5 keystones, but just future-proof yourself and get the Cat 6.

http://www.monoprice.com/product?p_id=5384

You'll also need a punch tool.

http://www.monoprice.com/product?p_id=7043

As casey_sounder says, telephone rings are typically 60-90 Volts DC, whereas ethernet is 2-3 Volts. So be damn sure not to accidentally connect the phone pair to your ethernet keystone.