Tandem connection

[teletechman]

I have 2 Magix R4.0 connected via a fiber connection with media converters and 100DCD cards. It has been running for a few years all of the sudden they cannot call across it. When you dial you either get a fast busy and the DCD card goes red and shows PRI issues or you get silence for 6 to 7 secnds and then get a busy tone and the card shows yellow then drops the call as soon as the busy appears. I have checked all programming and cannot find a change, also replaced both 100DCD cards.
Any thoughts???
Mike

 

[SYQUEST]

What alarms or error codes are being reported?

Are the cables to the media converters good?

Is there any damage to the fiber?

What do the LED indicators on the media converters show?

Have you performed any loopback tests between locations?

....JIM....

 

[teletechman]

The cables are good between the converters and the magix, the fiber is good I did switch to different fiber strands with no change. The LEDs are all lit which is what they are supposed to be. The alarms are 6C01,6C03, 6C04, 6C0A, 7001, 7002, 7003, 7004 they all lead to a PRI issue but the link is up. Not sure how to do a loop back between the systems if you can tell me how I would like to see if it shows anything.
Mike

 

[SYQUEST]

All of the Error Codes refer to a problem external to the Magix, unless these errors are being generated by just one location. It might be best to post the print of the errors from each switch as to identify the source or direction of the facility problem. This most likely is a physical problem of some sort.

Who made the media converters, model number?

The Legend/Magix Maintenance document provides testing routines that can be used to troubleshoot the Magix using SPM. You can download the documents from support.avaya.com if you don't have them.

In order to perform a physical DS1 loopback, you need a "loopback" plug. It consists of an 8 position Modular Plug with pins 1 and 2 connected to pins 4 and 5, respectively.
What it does is loop the transmit to the receive. If you don't have a Modular Plug tool, you could make a loopback jack, by strapping the same pins as mentioned above on an 8 position Modular Jack, and using a patch cord to provide the means of connection. The loopback can be used to sectionalize or isolate segments of the circuit in order to find the problem(s).

....JIM....

 

[teletechman]

What loopback tests should I run from the SPM? Also one side definately has more error then the other side. One side has a lot of SLP's and MIS's in the current error location for the card.
Mike

 

[teletechman]

Just looking at the install job aid and it says something about the CSU's, do the CSU's on the 100DCD card need to be enabled?
Mike.

 

[SYQUEST]

If the CSUs of the 100DCDs are not enabled, I would leave them that way, because your installation with the fiber link does not require them, since that facility is not telco provided. There is no specific benefit for your installation.

In regards to testing the 100DCD modules, see the Magix R3.0 Maintenance & Troubleshooting document for all the procedures. You should try to perform all the tests for 100DCDs, that can be a learning experience for you. It would be good for you to post the print of the 100DCD configurations, that can be helpful for us to ask questions or provide more info to help find the problem. Does either switch have another 100DCD module for trunking or are they using analogue CO trunks?

....JIM....

 

[teletechman]

One end has a 100D card and the other uses a 100DCD card for external calling both are T!'s not PRI's.
Mike

 

[merlinman]

Have you tried powering down and back up?

I would start with that.

http://home.comcast.net/~merlinman

 

[teletechman]

OH Yeah multiple reboots, I will try the loopback tests when I am onsite.
Mike

 

[teletechman]

Does anyone have the job aid for the setup of this so I can refresh my memory?
Mike

 

[SYQUEST]

You could post the items requested previously, and answer the unanswered questions. It is difficult to provide suggestions or help when we don't have a complete picture of the situation or information!

In your original post you said the connection is configured as PRI. Now you say it is CAS DS1... Now, I don't know what to think!

....JIM....

 

[teletechman]

I am answering the questions, you asked

" Does either switch have another 100DCD module for trunking or are they using analogue CO trunks?"

That is when I answered, one system has a 100D card for external calling and a 100DCD card for point to point (PRI).
The other system has 2 100DCD cards one for external calling and the other for point to point (PRI). I am trying to get the config on both PtoP cards now.
The media converters are Transition Networks Fiber to T1/E1 standalone units PN#SSDTF10xx-10x.
What other questions did I miss?
Mike

 

[SYQUEST]

Thanks, that will help until we see the printouts from the Magix. In the meantime the media converters have a loopback function for the copper and fiber sides. The user guide covers some steps for troubleshooting. You might want to follow those to isolate or segment any problems that could be there. If you don't have the user guide, you can get one from

http://www.transition.com/Transitio...duct.aspx?ID=16335&CategoryName=SSDTFx0xx-1xx

It is in PDF format.

....JIM....