Tipping CAT5 with RJ-11 for DSL

[SgtDykes]

Here it is: I recently switched to DSL and I have a CAT5 terminal panel (1 slot in/6 slots out) running cat5 through out my house. I want to take the incoming cat5 line and tip it with an RJ-11 to run to my modem, then run cat5 from modem to patch panel, and from the wall jack to my wireless router. I have every thing I need, I have even tested to figure out which cable on the panel goes to the jack I want to use (since the lazy contractor decided not to label them!). I'm just not sure which pair to tip. I assume it would be the blue pair because that's how I've usually seen the wiring done when running digital telephone lines. But i wanted to get some one else's perspective.

 

[imagoon]

RJ-11 plugs in rj45 fine. Patching like a normal RJ45 patch and use RJ11 cables at the connector sides.

 

[SgtDykes]

I know but I'm taking an untipped cat5 line and it has to plug into the phone port on my DSL modem. So what I need to know is which pair on the cat5 to use in the RJ-11.

 

[bruceb]

Just look at a regular telephone wall cable. The DSL input to the modem will be on the Red and Green wires of the RJ-11 plug. In this case Pin #3 Red .. Pin #4 Green
See link

http://en.wikipedia.org/wiki/RJ11,_RJ14,_RJ25#RJ11

It should be the White-Blue (corresponds to Green) / Blue (corresponds to Red) from the data cable (Cat 5)

 

[imagoon]

I know but I'm taking an untipped cat5 line and it has to plug into the phone port on my DSL modem. So what I need to know is which pair on the cat5 to use in the RJ-11.

Technically you should still terminate it to a RJ45 patch. But:

http://en.wikipedia.org/wiki/Registered_jack

 

[drebo]

I know but I'm taking an untipped cat5 line and it has to plug into the phone port on my DSL modem. So what I need to know is which pair on the cat5 to use in the RJ-11.

A phone line numbers its pairs out from the center. So on an 8P8C connector, pair 1 (line 1) will be pins 4 and 5, pair 2 will be 3 and 6, pair 3 will be 2 and 7, etc.

As to what color they are, well check out the chart in this link, as it depends on how you have the CAT5 terminated: http://en.wikipedia.org/wiki/TIA/EIA-568#Wiring

As a note, phone lines don't care about polarity, so it doesn't really matter which wires you make "tip" and "ring" although you should try to use the same colors on both sides of the cable.

 

[imagoon]

As a note, phone lines don't care about polarity, so it doesn't really matter which wires you make "tip" and "ring" although you should try to use the same colors on both sides of the cable.

Actually they do, but most devices auto "flip" incorrectly wired connection.

 

[ScottMac]

A phone line numbers its pairs out from the center. So on an 8P8C connector, pair 1 (line 1) will be pins 4 and 5, pair 2 will be 3 and 6, pair 3 will be 2 and 7, etc.

As to what color they are, well check out the chart in this link, as it depends on how you have the CAT5 terminated: http://en.wikipedia.org/wiki/TIA/EIA-568#Wiring

As a note, phone lines don't care about polarity, so it doesn't really matter which wires you make "tip" and "ring" although you should try to use the same colors on both sides of the cable.

The pair order you specify is USOC, which is not used anymore in favor of EIA/TIA 568 pair ordering. For an RJ45-style connector, pair 1 is pins 4&5 (blue), pair 2 is pins 3&6 (orange or green for 568b / a), pair 3 is pins 1&2 (green or orange for 568 b / a) and pair 4 is pins7&8 (brown).

For an RJ14 (2 or 3 pair connector), then the pairs are like the USOC with 1 & 6 taking the third pair position.