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

Don't know if that will work, you already said you swapped a different working co line to that port and had same trouble no?

Yes I did and it still didnt work. But I had to change every possible thing to show the customer it wasnt the system. So like I said everything in line from dmarc to phone system was changed and tested. For some reason we are able to dial out and receive phone calls but cant hear the dial tone. Just sounds like a click and then dead air.

Polarity causing the problem? Maybe low loop current? Should be 17-22 milliamps off hook.

where do we go with this now?

Ok so bad news! I had verizon come in and give us another line. Put it into the phone system and same thing. I changed between 7 different pairs on the 25 pair backbone just to make sure it wasnt that. Still nothing. Then I took the questionable pair off the new binding post and ran it to another pair that has a good line on it. Line 3 came up with the same number as line 2. So that means all the wiring is good as well as system. We are planning a vendor meet this week. We do have dial tone going into system on line 3 but no dial tone when at a station. We can dial out and recive calls on it. Just cant hear dial tone.

What happens when you put your butt-set on the line? What is the voltage of the line? Loop current?

Will, I know that I am very late in chiming-in, but have you seen the mountain of CO line parameters in programming? I couldn't believe all of the settings that are available. There sure are a lot of settings there that I could see making a CO line port misbehave.

I'd program the last port for IST. Then I'd take a FACTORY MADE KNOWN GOOD cord loop it from that port to each CO line input and use that for CO line simulation.

Kinda jumping in late but just some ideas. Is this a regular pots line or off of a FIOS platform? Also I have seen this and a couple of times when Verizon is using something out in the street to give multi dial tone off of one pair. When they do not want to invest in the copper plant they put these devices on the give them 2 dial tones on one pair. I forget what they are called but you see them more and more now that Verizon does not want to install new copper in the street. Hope this helps.

Jim

Nfc I put the voltages in one of my replies. The voltages are fine and the butsett has dialtone on the 66block were the octopus cable is punched down going into the system. Also get dial tone coming out of the fitting that plugs right into the port. Ed there are a ton of co parameters but if I switch a good line into that port it works. Also if I switch numbers at the demarc and run a good number into that same port it will come up. Its not the phone system. There is no way. R.B.F- I would rather be fishing as well!!lol But I dont understand your post 100%. Comdial that is what I think it is. Well not exactly what you described but I think there is something on the lines in this area that is interfering. I know I have had this problem when I have left a toner on a line. Seems like if there is foreign equipment on the line the sbx doesnt like it. If Verizon shows up all they are going to do is clip on before the system and hear dial tone. What do I say then lol!! Fingers crossed we get a good tech!!