Sharing CAT5 line with phone?

[BCinSC]

Only need 10Mb connection and have 2 phones lines to run to new room. Can I use single Cat5 cable to cover all? How about Cable TV - could it use a TP as well? Thanks

 

[Somecallmetim]

I have hooked up one phone line and the 4 wires needed for computer networking and it works fine for me.

 

[gunrunnerjohn]

There are two unused pairs for 10/100mbit connections. Don't get the phone lines crossed up with the NIC connection, it will toast the NIC.

 

[foshizzle]

Is the cat5 already in place, or will you be installing it? If you have yet to install it, I think your best bet would be to run 2(or more).

 

[JackMDS]

Quote: "Sharing CAT5 line with phone?".

It is like running a Ferrari with a Regular Grade Gas. :disgust:

Would the Ferrari run?

Yes, with knocking and pinging.

Would the Ferrari run for long time? :music:

Nah, the engine eventually will die. :brokenheart::brokenheart::brokenheart:

 

[buleyb]

I thought there was a huge issue with running network over a few pairs and the phone with 100VAC over the other two, someone help out here? Several threads on this have come around...

 

[BCinSC]

Since when is phone 100VAC?

 

[JackMDS]

Originally posted by: BCinSC
Since when is phone 100VAC?

In a Ferrari it is not 100V.A.C.

At home it is.

Wait a minute you meant a Cellular over CAT5?

Yeah, Cellular over CAT5 is OK.

http://forums.anandtech.com/messageview.cfm?catid=36&threadid=1172976&FTVAR_MSGDBTABLE=

http://forums.anandtech.com/messageview.cfm?catid=36&threadid=836046&FTVAR_MSGDBTABLE=arc

 

[ScottMac]

The ring voltage to a phone (even the cute little electronic ones) is 105 VAC @ 20 Hz.

Other than that, there is -48VDC always on the line (tip & ring). Well, not always; it dips periodically to signal off hook & such.

Phone & network on one cable is not a good idea. Doable, but still a bad idea.

FWIW

Scott

 

[gunrunnerjohn]

Originally posted by: BCinSC
Since when is phone 100VAC?

FYI, the ringer voltage is 90-100 VAC at 20HZ for POTS. Even the 48VDC will zap most NICs, and that's there all the time.

 

[buleyb]

See...slightly off but I was on the right road...thanks guys

 

[BCinSC]

Well, if I connect the phone wires to the NIC, then I deserve a fried NIC. There are 4 twisted pairs and I want to use 2 for network and other 2 for phone. As long as I don't mix them up, will there be interference or crosstalk?

 

[buleyb]

I'd vote yes...get another wire.

 

[gunrunnerjohn]

There is potential crosstalk, though it's been done by many corporations successfully. I just run another wire, but then I don't go looking for trouble.