HELP: CICS loses connectivity with all COs at once?

[Phoneguy65]

I have a CICS on a site where the lines seem to go dead.
You press the button and the LCD icon comes on, but nothing is heard. If you ring the line, it does not ring on the KSU.
The intercom still works perfectly during the line outage.
I installed 3 jacks wired as a direct appearance of the lines, and when the KSU refuses to recognize the lines the actual CO lines still test OK.

One error code has appeared that I can't find in the documentation: 51-2

I replaced EVERYTHING with identical hardware, and the fault still happens.

Anyone hear of this one?



Pat MacKinnon
Omni telecommunications Inc.,
London, Ontario, Canada
omnitel-ca

 

[bkrike]

51-2 is “trunk module has been disconnected”- Do you only have 4 lines on the system? You say you replaced everything? Did you replace the trunk module and cabinet, and software? I have had that problem before- replacing the trunk card fixed it for me.

 

[bkrike]

One more question- do your lines happen to be coming in through a channel bank, or do the CO's have a high pitched squeal when your buttset is on them, but not off-hook?

 

[Phoneguy65]

The CO lines are not on a channel bank.

EVERYTHING was replaced, the KSU, the CI-trunk card, and the software.

The KSU has only 2 lines on it. (it's a small hardware store.)

That's what's so puzzling about this one. I'm wondering if there is a bad batch of somewhere in the mix.

There is also an engenius cordless on the system, and I'm wondering if stray RF is glitching the cabinet and spoofing it into thinking the card has disappeared?

Pat MacKinnon
Omni telecommunications Inc.,
London, Ontario, Canada
omnitel-ca

 

[Phoneguy65]

The base station however is almost 50 feet from the KSU, so that is a slim to none chance.



Pat MacKinnon
Omni telecommunications Inc.,
London, Ontario, Canada
omnitel-ca

 

[bkrike]

One other thing I just remembered- the card that went bad was a new style CLID (flush with the cabinet.) I replaced it with an older style CLID (protrudes from the cabinet,) and have not had a problem. Maybe it is a bad batch of new style CLID cards. I would say the EnGenius has nothing to do with it. I have about 10 of those at customer sites- no problems.

Do you have an old style CLID card?- maybe you should try one of those.

Also- how often does it happen? Heres what happened with mine (which was about a month ago.)
-Installed and had no problems for about 3 weeks, then one day they started getting that alarm, I had them reboot, and it returned within 30 minutes, then I went out, did some testing and replaced the card. No problems for the last 3 weeks now.

 

[Phoneguy65]

The CI card is the flush type. I will swap it out for the previous revision that sticks out a bit. I'll let you know.



Pat MacKinnon
Omni telecommunications Inc.,
London, Ontario, Canada
omnitel-ca

 

[rconn]

I have had the same problem with the CICS in my office. It was the newer Global card and when I used the older CLID card it was fine. I got the original Global card replaced and have not had a problem for 2 months.

Rob

 

[EdGaillard]

I too have just had that problem, I had a newer CLID card (Flush with cabinet) All lines would go dead for about a minute and then they would restore. I replaced the card with a DS Loop card and have not had that problem. I don't have caller ID So a loop card was used.

 

[telemarv]

Ok I'm a little confused... Your post says this is a CICS, there are no trunk modules on a CICS. 2nd during these outages have you verified dial tone from the telco, not just at the block but right in the amphenol on the KSU. I've seen these connections come loose because of the screw on the amphenol. Make sure you back it off, or even remove that screw so that it doesn't interfere with the mechanical connection of the amphenol.

 

[Phoneguy65]

A CICS will accept two trunk cards.

The error code refers to a module, but it is interpreted to mean the removable card(s).



Pat MacKinnon
Omni telecommunications Inc.,
London, Ontario, Canada
omnitel-ca

 

[rconn]

The alarm reported is a 51-2. "The trunk module has been disconnected" The trunks are still module 2 in maintenance as they are on the core of a MICS. This seems to be a DS30 type trouble as the it is reporting the TM missing.

In my case this problem was very intermittent over a period of several months. Sometimes it would work OK for several weeks. The line would restore at times without intervention and at other times I would have to power down the CICS to get the dialtone to restore. When I used an older CI card there was no problem for over a month and I have had no problems with the new Global CI card.

The number of responses would seem to indicate that there is a problem. I am running 6.0 on the CICS, I did not have another SW card to try out.

Rob

 

[jerryreeve]

I have seen this with the 6.1 CICS software when it was used with a new Global card, I had tried swapping out every item one at a time, ksu, card,software. finally I pulled the entire system and did a full replacement, it has worked since.

Not the best method for repair but when the choices are all poor you take what you can.

----------------------------
JerryReeve
Communications Systems Int'l
com-sys.com

Mind like a Steel trap - Once used forever clamped shut.