atcomsystems.ca/forum Forums TDM Business Telephone Systems Vodavi Telephones & Systems Sbx bad dial tone??

Ok so I have no clue how to actually type what I want to say here lol!!! Im having a problem with an install I did last week. I have an sbx with 4 co lines going in. I plugged them all in and set them up to ring station group 620. All of the lines have dial tone going in. When I push each line button they all come up accept for line 3. I get a click like there is something there but no dial tone. I pulled the line out of the system and clipped on with my buttsett and I have dial tone. Plug it back in and nothing. If I switch it with another port then the port that was working isnt and port 3 is now working meaning its not a port issue. I tried 4 different fittings and all the same thing. Thinking maybe its a bad pair in the 25 pair from dmarc I switched to another pair. Same thing. So then thought maybe there was some foreign equipment on the line causing problems, I went back to dmarc and switched co numbers to each line. For example say I have three numbers going into system. 0001,0002,0003 (0003 being the bad one), I switched 0001 with 0003 and went back to a station to try it out. Now the line that 0001 was on is not working and the line 0003 is working. So to me that obviously means the actual wire itself is good. Also now that I have switched those numbers the line 1 has no dial tone and line 3 does. I had the customer call verizon and ask to check lines for anything on them. They came out and tested good to go. You know their response "I got dial tone to dmarc so my job is done". So Im clueless what to check now. Any help or ideas would be great.

Are you able to take the RJ that goes into the system and plug it directly into your buttset? Only thing that I can think of and you may have to if that is what you meant by "4 different fittings".

I don't think polarity would be the issue, I can't remember the last time that a system was really polarity sensitive (Comdial Impact maybe..) but it is always what we least expect that is the problem sometimes.

Where did you "clip on", try using a banjo right on the rj11 going into the sbx.OR plug into a BISCUIT BLOCK and see if you get dial tone on the red green wires, bet you have a bad plug.

Yea thats what I meant by changing the fittings. I tried four rj11 fittings. I clipped on with alligator clips and with a turtle and still got dial tone.

What is the voltage like on that line? I am just throwing things out. This is an interesting quandary.

what kind of "fittings" are you using; some are for stranded wire(Which don't work well on solid wire);and then theres the ones for solid wire.also across which pins do you get dial tone?
your original post has every indication you have a bad plug. if you get dial tone with a butt set but not on any co line jack; try using a buscuit block with the co on the red & green and use a standard mounting cord just for drill.

I have 46.5 on hook and 5.16 off hook. I was told that I should have 24-50 off and 5-15 off. Im at a loss!

Voltage is good, how does it compare to the others?

Also, have you tried swapping the physical cable that you have going to the line-in on the SBX? I know you said you swapped then to see if the port is bad, but try swapping them at the DMARC and see if it follows the cable, or try another pair if you have them available going to the SBX.

So what happened with this?

Well went back today with new KSU. Same thing. So I have switched out everything from the dmarc to the ksu and same thing. We did find out today you can make and recive calls on that line thru the system. You just cant hear the dial tone. Have no clue. We are going to get a different number on hopefully different trunk and see if it changes.