atcomsystems.ca/forum Forums TDM Business Telephone Systems NEC Telephones & Systems Head banger

Century Telephone? Sounds like a CLEC issue. Especially since this just "popped" up after a year of service...

Btw, what software version is on the CPU II? Since it's rollout, the IPK II has been full of "bugs". I always keep my sites updated with the latest software release's...

Lee's test would be good to determine if there is a problem with your CPU II...

Century Tel is a decent-sized ILEC with a presence in many states. They are not a CLEC.

Lee,
No we have not called fax to fax. I will try that on my next visit this Thursday. (why didn't I think of that)

IPK II,
Our plans are to update the software also on Thursday.

Dan S

Here the update.

Per NEC. First the SLI card was switched out with no results. Software upgraded with no results.

This was tested today that was not tested before.
They have 2 faxes of the same make and model one is station 117 and the other is 118 and a 3rd fax of a different make and model on its own dedicated line. Again the 2 faxes of the same make and model will receive the CO message of that number does not exist. So today we took the 3rd fax and connected it to analog station 117 and it connected every time. We also faxed station to station with no problem.
HOW CAN 2 FAXES START TO MISS DIAL ON THE VERY SAME DAY 2 WEEKS AGO???????
I have this thought in the back of my head that says something is going on at the CO.
But after today they have washed their hands and refuse to do any kind of testing. Now our customer is convinced its the NEC system.
I can tell you this, NEC has always been good to admit if there is a glitch in their equipment and go out of there way to help but on this problem its first for them.

Tomorrow I will get the make and model of the 2 faxe machines to see if there might be a manufacture bulletin.

dans,
Please pass on the make/model. It sounds like an error in the digitstream being sent by this particular model. Can this "problem child" model succesfully send fax calls to any other faxlines?

Mike,
When this problem was called 2 weeks ago about 2 of 8 faxes would complete. Yesterday and today 6 of 8 would complete the fax. When you bypass the phone system they all go threw.

I am having a hard time with both faxes started having the same problem at the same time.

Dan
I am convinced that nothing wrong with the PBX.
Has it ever happend that a normal voice call didn't go thru?
Can you change the fax dialing mode from tone dialing to pulse dialing and test if the calls can go?
Also, did you try to use other faxes??

Lee,
Voice calls go threw everytime.
I have not changed dialing mode from tone to pulse.

Yes we connected a different make of fax and it worked everytime.

The make and model of the fax machines we are having problems with are the Canon L120
I called Canon and I was told they do not support this model behind a PBX.

But again these 2 fax machines worked for 5 months with no problem. And for both of them to start having trouble at the same time, thats why its a head banger.

Dan S

My guess, and this is only a guess, is that the threshold for the DTMF digits the NEC hears may be pretty tight, and the Fax machines may be a little too sloppy in their DTMF generation.
If you put a DTMF decoder between the system and a pots line you may see what the NEC is not recognizing.
I'm not familiar with the IPK II but you may want to look into where the touch tone receivers are, and think about replacing that piece of hardware.

ttech

Digi grabber showed the correct digits dialed.
And what you are saying could also be applied to the CO's equipment not translating the DTMF properly. This could be the start of equipment failure on their part.