I recently added phone wiring to a new room in the house that I'm
using for an office. I feel pretty confident that it is wired
correctly at the interface, I have used proper wiring, etc. My
problem is that I can hear both phone lines when I try to use line 1
and hear nothing at all on line 2.
It's the same phone that worked fine in the previous set up. Any
ideas what I can do to fix this or where I can go for help?
I suspect that you have switched the wires you that you are looking at one
wire from each pair.
I suggest to go back to the interface and "do it by the numbers:"
1. Put working telephones into each of the two jacks at the interface and
ensure you have good dial tone(s) at the interface. (If not, it is a telco
2) Disconnect ALL wires from the terminals in the interface.
3) Connect one PAIR at a time and ensure that the telephone works at the
other end. (Pair #1 is usually red/green, pair #2 is black/yellow) The
terminal block is usually color coded.
Start with the assumption that you haven't "used proper wiring,
You might try posting to alt.dcom.telecom and
comp.dcom.telecom.tech, but you'll need to provide some details
about just exactly what you have and how you wired it. In fact,
if you reply to this message, I'm setting Followup-to: header to
those newsgroups and deleting alt.engineering.electrical.
First, describe the symptoms better. I have no idea what you
mean by "I can hear both phone lines when..." Describe what you
are doing and what you hear. Do you mean that when you pick the
phone and push the button for Line 1 you are connected to both
lines? Someone who picks up another extention on either line
will be heard??? But when you push the button for Line 2 you
hear nothing at all???
That sounds as if you've got the connections to the telco
interface correct, because you can hear each of the two lines.
But somewhere you've made it so that instead of connecting to
the two lines on the telephone set, you've got the both
connected only to Line 1 at the telset. What kind of a
telephone set, and how are you connecting to it?
I don't know just how you might have done that, but I've seen
people work at tying down cables for an hour before discovering
they were off by one pin...
I hain't never ever done nothing like that myself, of
Floyd L. Davidson <http://web.newsguy.com/floyd_davidson
Ukpeagvik (Barrow, Alaska) email@example.com
From the phone interface in the basement, I ran wire approx. 20 feet
and up through the floor. At the phone jack in the wall, I just
matched the four colors (red to red, green to green, etc.). I am
using a RadioShack two-line caller ID phone with speakerphone (which
worked fine previously). When I picked up line 1, I heard an echoing
dial tone so I decided to check my voice mail to see if I could dial
out. I was using speakerphone to dial and my passwords to access both
lines are the same. Oddly enough, after entering my password, I heard
messages I had saved from both lines at the exact same time. I figure
the echoing sound I heard is dial tones from line one and two.
You should really be using twisted pair cable for RJ14 service (2 lines). That
is typically blue/white, white blue for line 1 and orange white/white orange
for line 2.
You will hear crosstalk if the wires are straight through.
The "telephone wire" sold by Radio Shlock doesn't have twisted pairs. I
found out the hard way when I installed my modem line in my last house.
I had to isolate most of the circuit branches from the second line to
knock down the crosstalk. Cat 5 is the way to go these days.
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