sundance-communications.com/forum Forums General General Telephone & Systems Information Bizarre ring situation

I have come across a situation that is puzzling. I don't think it is phone switch specific but here goes. Keep in mind these are POTS lines and not DID lines.

When an outside caller calls into the switch, the phone switch detects ring voltage and rings the appropriate phones. They can then pick up the line and talk.

As the outside caller calls in, they do not hear the ring tone. They just hear silence. Even though they hear silence, the phone is ringing on the other end. The phone company provides ring tone, not me.

Now, when I remove the suspect line from the phone system, the calling party hears ring tone when calling. When I place another line in this port, the port rings fine and the calling party hears ring tone. When I place the suspect line in another port on the system, the line does the same thing as in the original port, calling party hears nothing, phone system rings.

So I feel I have isolated the problem to the line coming in and not the switch. Yet, when I put my butt set on the line, the line rings and there is ring tone to the calling party. And of course, the phone company says the line is fine and tests within tolerances.

OK. So now it's finger pointing time. I show the the customer my logic and agrees with me. The phone company comes out on site and the customer listens to his word that the line is within tolerances. The customer now has a headache.

Is it time for a vendor meet? Are there some words of wisdom out here of what I can do to prove it's the phone company? Does anyone have a clue?

The only thing I can come up with is that there is not enough voltage of amperage from the phone comapny.(?) When I short out this line, which it is right now, the line hunts to the next line and all else is normal.

FYI. The switch is a 6x16 Vodavi Starplus.

when you call a number...you are hearing phone company ringing...thats normal.

when that line is connected to a phone system...you still are gonna hear phone company ringing...

Im a little confused about what your problem is...but there doesnt seem to be one...

How can an outside caller hear a phone systems ringing pattern?? THey are no way connected...

Hope this helps..

Maybe I wasn't clear. When the line is plugged into the switch, the calling party hears no ring tone. Nothing. In the mean time on the other end, the called party is getting ring voltage from the phone company.

For example, you are calling me. You dial me up and you wait to hear ring tone confirming you dialed correctly. I am now getting ring voltage into my switch.

My phone has now rung three times before I pick up the phone. In the mean time, you should have now heard three ring tones. It has been about 12 seconds already and I pick up the phone.

You as the calling party state that "I never heard your phone ring and I thought that I didn't dial enuf numbers". I have just seem to mysteriously pick up the phone from dead silence to the calling party.

The calling party never hears confirmation ring tones after they dial their 7/11 digits.

Disconnect line from system and test all voltages, then hookup to system and test again. There should not be any difference. It could be a load coil at the central office causing the problem.

Good Luck!!

A6,
THIS PROBABLY HAS NOTHING TO DO WITH YOUR SITUATION,AND I KNOW NOTHING ABOUT VODAI. IMAGINE, HOWEVER,THAT A TRUNK PORT HAS BEEN DIRECTED TO SOME SORT OF QUEUE WITH MUSIC ON HOLD WHILE THE CALLER IS WAITING, THERE IS NO SYSTEM MUSIC ON HOLD CONNECTED SO THE CALLER HEARS SILENCE. AS FAR AS THE NETWORK PROVIDER (SPRINT, BELL OR AT&T)IS CONCERNED THE CALL IS TERMINATED, RINGING STOPS AND BILLING IF APPLICABLE STARTS.THE CALL IS CONNECTED TO A STATION WHEN IT IS RIGHT BUT CALL CUTTHROUGH DOES NOT OCCUR UNTIL THE CALL IS ACTUALLY ANSWERED AT THE STATION. IN SOME CASES, THE PAYING CUSTOMER IS NOT TOTALLY AWARE THAT A CALL WAITNG IN A SYSTEM QUEUE HAS BEEN COMPLETED FOR NETWORK BILLING PURPOSES. MAYBE THIS WILL HELP SOME ONE ELSE THINK OF THE REAL ANSWER.

A6,
It is time for a vendor meet, their line is not up to the right ring voltage, and you have proved this with moving the line and the problem follows the line. You are right on the money. Your local provider needs to either beef up the voltage or put the incoming line on a new pair.

I'd add that using a butt set is not a valid test, I've had butt sets that would ring on very low ring current yet a 2500 set would not ring. I know that is oppisite your problem (ring back tone) but still know that a real 2500 set is best for this kind of testing, and a real bell in the phone is a good thing. Also Telco does not gauranty a ring back tone or the timing of the tone.
They also don't gauranty immediate dial tone when you go off hook - in bad weather you could wait up to a minute.
mark

A6
I work in the central office of a small telephone co. It sounds like a telco problem
i would call the phone company back out there
and show the tech.
I just want to say that i enjoy this site i don"t post alot but i get alot out of it
Thanks

Try reversing Tip & Ring, could be a ring side ground in your KSU. If the other lines are not reversed they would not show the problem.

The problem is with the phone company. Try reversing T/R first. I'm sure the copper loop is fine and all the voltages. Request that the CO change the last lowspeed DLC card that is on your service. It signals the CO switch what your station/line condition is. Seen this many times.
Who is the local carrier?

[This message has been edited by gkar (edited August 27, 2003).]