atcomsystems.ca/forum Forums TDM Business Telephone Systems Nortel Telephones & Systems Norstar or Telco No positive disconnect

Did you try what JBean3329 suggested? Put caller on hold, have them hang up and see if the line clears? I'm willing to bet telco isn't sending disconnect. For some reason, some telco's have a problem understanding what it is.

I did have telco out once and they confirmed that we were receiving positive disco from the CO. However I just tested by putting the caller onhold and had them disconnect. The call remained on line one even after I disconnected.. I will be calling telco out once again to prove it's there issue. I will let everyone know how this saga ends!!! To Be Continued............

I love Telco's, it is never there Issue EVER. Until installers prove it with hours of unbillable time. :bang: :bang: :bang:

It is really a shame how many countless thousands of hours are spent on this issue. The people that the telcos hire nowadays barely know which end of a screwdriver to hold, yet their word is the gospel. People mess around with timers, change out hardware, etc., all the while the problem is in the telco's service.

It is such a simple feature and yet nobody seems to have come up with a universal name for it. If they would all start using a standard name or acronym, it sure would make everyone's lives easier.

By the way, if the site is in an area that it's being served by a Nortel DMS central office switch, the feature is referred to as "COD" or "Cancel On Disconnect". Maybe if you use that terminology, you might find someone at the telco who will understand and react accordingly. Try also referring to it as "loop supervision" or "Calling Party Control (CPC)".

Most of the time, this disconnect is being sent by the CO switch but not repeated by pair gain terminal equipment. This means that you hear it going open with a butt set, but the loop never physically opens. It's almost always settings in the pair gain hardware. You are going to have to prove definitively to them that the line does not go completely dead when the calling party hangs up and then pray that when the telco sends a tech out, it will be someone from the old school who understands this stuff.

Well this story has come to an end!! Telco was onsite after showing them a few examples on how I wasn't receiving positive disconnect from the central office & guess what???? They said they had some old equipment they switched out and everything is working perfect. I wanted to thank everyone for pointing me in the right direction to get this issue resolved.

Thanks for checking back and letting us know. This is clearly one of the oldest complaints that we have against the telcos. They always swear they are correct and it is something wrong with your equipment (I am being nice). You spend thousands of dollars to buy replacement equipment and for labor only to have them be proven wrong. All they have to say is "oops", we'll take care of it.

It's totally out of control and is happening nationwide. The telcos are literally licensed to steal from their customers and the customer's vendors. We can't afford to fight them and their customers don't want to bother once their phones start working properly. Guess who ends up getting the short end of the stick?

Thanks for updating...

Another story of us the interconnect having to eat our costs because of gross incompentance at the provider. You try sending them a bill for your time, but we all know what will happen there.

We are an authorized dealer for a telco and what the telco was doing here in AB for a while was if we issued a telus ticket number and the trouble was on there side and we spent time fixing or working on it. We would send a bill to the client refrencing the ticket # and the Telco would credit them the cost back on there bill. Anyone want to guess how long that lasted?????? :bang:

The stock answer in Verizon Mid-Atlantic region, for any customer generated trouble call is "IT'S AN EQUIPMENT PROBLEM {CUSTOMER EQ.}CALL YOUR VENDER.99% of the time i have customer tell Verizon,Vender[ME] checked it at demark and have them come out to fix. A Thing that really burns me up is having to call in for BP locations when customer uses non/Verizon vender,They will not tag lines for customer.---------John

Altho the direction seems to be changing in this thread, I just wanted to insert this.
I have had disconnect problems that were cured by lowering the loop current. Typically these hi loop current situations were close to C.O.'s or SLIC huts. And the off-hook voltage was over 8 volts. Sometimes, it's so bad, it burns out C.O. ports in KSU. Generally, the LEC will not do anything about it. Sandman has a loop attenuator that usually helps.You usually can't use resistors because they knock down audio levels too far. 1N4004 diodes connected inverse parallel knock the voltage 0.7 volts per pair, and you have to use them equally on tip and ring to maintain balance. But they get really cumbersome when you have 6 or 8 C.O.'s that are at 12 or 14 volts and you are trying to get down under 7 Volts. John C.

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