sundance-communications.com/forum Forums TDM Business Telephone Systems Nortel Telephones & Systems Flash issues

Disconnect supervision is set in trunks and it should be set to y.

I know this is annoying, but set it to nite ringing and make as many calls as you can tolerate doing two at a time from a couple cell phones so you see if it is a bad line one or line two.

If the lines are set to y on supervision and you get hang ups on the test calls, are they all on line one or all on line two? If so, then you have a bad trunk or a bad port on a line card.

If they happen on both lines, try setting the co distance to long on all the lines and try the test again.

If calls are going to hang up, it will happen in the day while you are making test calls not just at night.

Let us know what you find out.

If they are a long way from the CO

This could be provider problem if lines are pots. Monitor the lines at the dmarc using your butt set with the lines removed from the switch. Call in using your cell phone answer with your butt set after you answer call hang up the cell, what do you hear if anything on the butt set.
If these lines are channel banked is the router programmed for supervised disconnect?

If you don't remember there being an option for DS then its probably set to its default of NO. Be advised when you change it to yes there will be a delay of as much as a few minutes from the time you exit programming until you can again get dial tone on your lines. THIS NORMAL.

Never had that happen before telemarv! They are defaulted off and I always turn them on, but no delay.

Jim, have you tested any of this, what happened to solve it if you did solve it?

twisted, it depends on the switch and software. Newer versions there is no delay. I've had a MICS 5.0 take almost 10 minutes for all the POTS lines to come back on line. Scared the crap out of the 1st time I saw this... thought the system was fried. That's why I mentioned it.

I know this is an old post, but this reply is intended to assist others who may be experiencing the same problem. I am positive that it is a matter of the LEC not providing the required open loop disconnect signal when a call is abandoned (the caller hangs up). This happens on any system, regardless of brand, if the signal isn't sent. The voice mail needs to be "told" that it's OK to drop the call and not keep recording. Without that signal, it assumes that there's still a caller there and tries to record a message. These were probably hang-up calls that ended up in the general delivery mailbox, but the system wasn't told that by the serving central office that the caller was gone.

You need to put a toner on a CO line (do not turn it on). You should have a green light. Make a call to that line and have the auto attendant answer. While the main greeting is playing, hang up and watch the light on your toner. If it doesn't go out for about a half-second, there's your sign. You are not receiving the loop supervision required to tell the KSU, and subsequently the voice mail, to drop the call.

Another test is to simply access a CO line through a system phone and put the dial tone on hold. If, after about 30 seconds, the hold on the line doesn't drop, there's your sign.

This problem isn't noticed as much during the day because when a call ends, both parties hang up and the KSU doesn't really need this signal.

This feature is a function of the serving central office switch. If the lines are not programmed by the carrier to send this signal, you WILL have this problem. My vote is to try one of these two tests and when they fail, call the local exchange carrier and ask them to correct the absence of COD (Cancel On Disconnect) or Loop Supervision.

This may not be the case on all lines, so you will need to test them all. This usually happens when a customer switches carriers for local service and the new carrier doesn't configure their equipment properly. Welcome to my world....I deal with this every day.

:bang: :bang: :bang: :bang:

Weve got a winner! The problem was in fact that the disconnect supervision was set to off. When I turned it on, everything tested good. They are happy folks and trust me, so am I.
I really appreciate all of your expertise and your willingness to help.
Have a great holiday...