Merlin Legend / Magix phones freezing

[ncc63725]

I think I already know the answer to this but wanted to run it by a few of you before I proceeded in case I'm going down the wrong path.

I've got a system running a Magix processor at R4 V7.1 on a mostly otherwise Legend filled system. The problem I'm having is that, since adding an 016 MLX card to the system, if any phones on the last four ports of that board are used, all phones on that cabinet freeze up (you can't push any buttons and they will not respond to being taken off-hook).

My thought on this is that the power supplies I'm using (all 391A3 power supplies) are just not enough to power all the sets when they are used and that the last four on the board tend to trigger the freezing issue because when they go off hook it's just too much of a power drain. Before I go swapping it our for a C1 though I thought I'd see what you guys thought. Here's the current config:

Cabinet 1:
391A3 power supply
CKE5 Magix R4 V7.1 processor
008 MLX
008 MLX
008 MLX
008 MLX
100R

Cabinet 2:
391A3 power supply
016 TRR
Merlin Messaging R4 6-port
008 MLX
008 MLX
016 MLX

All ports are filled and all the phones with the exception of two are MLX 10D. The other two are MLX 20L with DSS units, both of those are on the first cabinet coming out of the first 008 MLX card.

Thanks!!!

 

[Dexman]

I'm not sure this is a loading issue.

Avaya's documents state that the 391A3 is good up to a total unit load of 75.

Based on the way the expansion carrier is populated you are looking at:


Module Unit Load
-----------------------------

016 T/R 12.8
016 MLX 27.0
008 MLX #1 13.5
008 MLX #2 13.5
Avaya Merlin Messaging 0

Total 66.8

MLX 10D's are "small" phones so I don't think they come into play. Is it possible that the 016 MLX module is bad?

If it ain't broke, I haven't fixed it yet.

 

[SYQUEST]

Anything interesting in the ERROR LOG?

....JIM....

 

[merlinman]

I somewhat subscribe to the "016-MLX" BAD theory.

However, I must ask, was this system, or most of it, ever in service as something older, say with a CKE3 Processor?

If so, a different path may be required to get to the end of this road.

Hopefully, just replacing the 016-MLX will correct this, but be sure and first do a BOARD RENUMBER just to see if it has any affect.

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

 

[ncc63725]

The error log shows no permanent or transient errors and the last 99 shows the last error at 8/10 when the PRI-D channel went down for a while late at night.

You may be right as far as power, just wasn't sure if I was pushing it since every port is filled. I did see in the pocket reference where MLX-10D uses 1.2 unit loads and with 32 of them that adds 38.4 for to the unit load which is over but I'm still confused as to what counts and what doesn't with power loads.

As for the board, I tested every port on my own Legend before I took it out there. I know that doesn't mean it isn't bad, since it was the only board I had in the test system and it could've gotten damaged in transport, but that's why I wasn't thinking it was the board. I'll get another one out there though and see if that helps. Will post back once I have some results.

 

[ncc63725]

Oh and I forgot to answer your question merlinman - I put this system together and I've always had the CKE5 in it, but it was put together from all used parts so who knows which components came from what other systems running what processors. It's entirely possible the 016 MLX was in a system that was CKE3, what does that indicate? Old firmware on the card or something?

 

[HiDesert]

Have you removed the wiring to the CP's last 4 ports to see
if this clears the problem...if thats not the issue, then
take a look at the firmware version of the card as MM suggests..last thing is the A3 PS...you may want to step
up to the C1 power supply...

 

[ncc63725]

I did bypass the wiring and try plugging different phones directly into those ports and got the same results.

I've been doing some research about firmware since merlinman brought it up and I did find this note on Avaya's website about firmware upgrades to this card:

Firmware version 1.5 Fixes “sleepy sets” - LEDs temporarily go off and buttons do not respond on MLX sets. Could also cause modem connections problems on MFMs.

This is very similar to what we've been experiencing and the firmware that shows up under maintenance --> inventory tells me that it's currently at 1.0. Might be at least part of the issue too.

 

[dagwoodsystems]

The "sleeping sets" issue has more to do with MLX-10s, which is why I prefer to use MLX-10DP sets.

When your gross load calc is close to the limit of the power supply, you then have to turn to calculating the load by adding up individual loads created by phones, headsets and all that stuff. I'll help you go down that road if we need, but let's try something else first.

To prove the theory about load (and eliminate those last four ports as the issue) why not simply remove four OTHER ports elsewhere, THEN try plugging in those last four. Make sure that the ports you unplug reside in the same carrier and have like telephones.

Tim Alberstein

http://www.dagwoodsystems.com

 

[merlinman]

Yes, there was that issue with MLX-10D sets back in '97.

I also like to use ONLY MLX-10DP sets for that reason.

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