Digital phone continues ringing after hangup from other side

[vpavlov]

Hello. I have to maintain a Definity G3csiV9 system here in Bulgaria.
I was asked to write a simple vector to play an announcement and give callers a choice of entering digits to route the call internaly. Here is what i did:
- installed the TN750C circuit pack, recorded announcements for business hours and holidays on it
- wrote a vector for the announcements and internal routing of the call
- made a vdn so that trunk group 1 points to it so that the calls to that trunk group get processed by the vector

So far so good.
The number of the announcement data module for TN750C is 778.
The number for the first announcement extension (business hours) is 779.
The number for the vdn used is 780.
The number for the second announcement extension (holidays) is 781.
The vdn points to vector 2.
Vector 2 is shown below:
01 wait-time 2 secs hearing ringback
02 goto step 10 if time-of-day is fri 17:00 to mon 09:00
03 goto step 4 if unconditionally
04 collect 1 digits after announcement 779
05 route-to number 777 with cov n if digit = 1
06 route-to number 309 with cov n if digit = 2
07 route-to number 308 with cov n if digit = 3
08 wait-time 5 secs hearing silence
09 goto step 4 if unconditionally
10 disconnect after announcement 781

The usual way things work are:
- I call from outside and hear the announcement
- I key in the proper digit - let's say 1
- The call routes to the proper destinaton (777) and starts ringing
- If the phone at the proper destination (777) picks up everything is OK
- after the call is finished the switch drops the line

The problem I have is when I do this:
- I call from outside and hear the announcement
- I key in the proper digit - let's say 1
- The call routes to the proper destinaton (777) and starts ringing
- I just hang up from the outside phone without waiting for 777 to pick up
- The phone at the 777 extension continues to ring
- The trunk line is blocked and doesn't release even after 10-20 min.

In essence when someone picks up everything is ok, but when I disconnect before someone picks up the phone continues ringing and the trunk is busy.

Can you please help me. i suppose the culprit is in the vector or local CO lines.
Thanks.

 

[mattKnight]

You probably need to enable Disconnect Clear on the CO lines with the Line Provider.

This enables a loop current drop for a defined length of time from the CO when the remote end disconnects. CM is able to detect this and clear down the trunk correctly. The CM needs to have the time period set (usually a bit shorted) so that it recognises the current drop as a disconnect correctly. I usually set them (on other systems) to be about 150 to 200ms less than the line provider's time (BT use 800ms as default, so I use 650ms)

What is happening at the moment, is that the CM thinks that the CO line is still connected, despite the remote end being cleared down. This issue doesn't usually occur when "real" people answer the phone because they are smart enough to know when the call has ended, but is a particular problem when using Autoattendants / vectors and other answering systems!

I am not quite sure where the corresponding setting for this is on CM as I am quite new to ACM, but I'll look it up and post again.

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[mattKnight]

The field on teh CM is page 2 of the Trunk group and is called disconnect timing

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[mattKnight]

Having read more - the page 2 setting doesn't apply!

Go the the Administrable timers page and look for the "Incoming Disconnect (msec)" value.

Anyone else care to confirm?

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[vpavlov]

Thanks mattKnight.
Contacting the provider here in Bulgaria is not an option. They are notoriously difficult to deal with and one has to have nerves of steel na plenty of time to find the right person usually after ten calls do different persons. Just a question: Doesn't Definity have any type of timer to disconnect the line if it continues ringing for a long time?

Thanks again.

 

[mattKnight]

Contacting the provider here in Bulgaria is not an option. They are notoriously difficult to deal with and one has to have nerves of steel na plenty of time to find the right person usually after ten calls do different persons.

Sadly, it is the same in the UK!

I don't know of a timer that will do what you want, but I haven't been working with comms manager long. Maybe someone else.

It may be worth the pain of dealing with the provider....

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.