DID FAST BUSY

[simonellen2000]

EVERY NOW AND AGAIN MY DID'S GIVE A FAST BUSY SIGNAL AT WHICH POINT I HAVE TO LOAD A FULL BACK-UP. THEY THEN WORK FINE AGAIN. HOWEVER, I CAN STILL MAKE EXTERNAL PHONE CALLS AS USUSAL. THIS IS BOTH ON THE ISDN 30 AND MY COPPER LINES. ON THE COPPER LINES IT JUST KEEPS RINGING FOREVER.

DOES ANYONE KNOW WHY THIS IS THE CASE? I CHANGED BOTH THE CPU CARD AND ISDN CARD. IT FIRST HAPPENED AFTER A LIGHTNING STORM ABOUT THREE WEEKS AGO. THIS IS ON A NEC NEAX 2000 IPS IN THE UK.

 

[OzzieGeorge]

Are there any alarms and have you asked your carrier to investigate as they should be seeing errors on the ISDN which may give you a clue

 

[simonellen2000]

No alarm lights show up on the ISDN card and British Telecom is confirming to me that it is not an error from them, although I am sceptical of that.

The odd thing is that when I load a backup, exactly the same one that was used on the live system, it then works again. I.e. I did not have to change anything on the programming to handle it. Maibe some lines hang or something.

I am trying to get to the bottom of this to see if it can be prevented in future.

 

[OzzieGeorge]

The thing is BT should be able to tell you what conditions they are seeing from your end and that would give a clue. It is obvious the fault is in the IPS as I wouldn't expect the same fault on both the ISDN and Copper lines from BT. Did you try a reset before resorting to a reload? Saying that are you sure the copper lines are actually programmed to DIT to somewhere and aren't just programmed for outgoing use only. I would be checking the clocking speed and source first. Enough slip errors and the ISDN could lock out.

 

[mextera]

Try a power down had to do that here a couple of times with ISDN here.

Is this problem off of digital sets or analog sets or both?

Mextera

 

[ctvi]

It may be a licensing issue. NEC "allows" you sometimes to program out of your legal license but you lose the programming once the system resets.
Check command F87>038:ISDN Trunk - should be ":A"
check command F88> 02TI(T1) Link should be at least ":0005" and 03:ISDN(PRI) Link should be at least ":0005"

Also, check that you match with protocol. I am not familiar with the UK but here in the US we have NI2, NI1, DMS etc. You can get a system to work with the wrong protocol but will see strange things from time to time. CMAA06.

http://www.ctvi.com