atcomsystems.ca/forum Forums TDM Business Telephone Systems Nortel Telephones & Systems Bad port on MICS?

I have a customer with an old MICS that has one expansion trunk module and one expansion station module attached to it.
For the past week or so, they say one of the phones, (x254/p302) will randomly go down and come back up. I have replaced the phone (M7310), moved the station to a different port, tried a different jack and pair from the MDF to the desk, and the problem persists.

The only thing I hadn't tried was to reboot the system. I rebooted, and now p302 will not come up at all. In maintainance, it says the port is unequipped. I can disable and re-enable the port, but no change. When you plug in a phone, it simply flashes and never does come up. Tried turning on set relocation and moving this phone to a vacant port, but the phone came up as the station that is default on that port. Tried a different phone on p302 and no different.

Could the station module be going bad?

If I were to replace the station module, will my port numbering change or stay the same as it currently is?

I have never seen a problem like this before, so I am stumped.

shut off set relocation try a different station mod and 25 pair cable if you can. your extension numbering should not change and you don't have to shut off the main ksu.

Do you have a 2 port fiber or 6 port fiber. If you have a 6 port fiber I would add a station mod and move the cross connect to the new station mod.

It is a 6 port card.

This system has been in service relatively trouble free for about 25 yrs. I believe it is still the initial software release.

You think I can replace the station module w/o powering down the main cabinet? Do to the age, I'm hesitant to change too much. I'm concerned that my port numbering will change if I change out the station module.

You can add or remove modules without powering down the KSU.

I would start with trying the phone right at the KSU 25 pair to omit cable issue and yes try another 25 pair quickly.
Could be the port on the station module is bad or corruption on the DN/Port.

I would copy programming from bad port to new port then change DN and rename.

I had already tried the phone directly off of the MDF, no change.

For the time being, it looks like the specific port is corrupt.

The system will not let me copy programming to another extension, as it says the original port is unequipped.

For the time being, I moved the phone from x254/p302 to x241/p121 and renumbered 241 to 254 and programmed as was needed.

Customer doesn't want to replace station module at the moment. Honestly, this is the first problem this system has had in its approx 25 yrs in service.

Thank you all for the suggestions and information. Much appreciated.

An update,

I just found out that the problem is still happening. This phone (which I've replaced once), is on a new port and I renumbered the DN so that is matched what was existing.

The new port (241) is on the main cabinet. The old port (302) was on the SM. If the SM is corrupt, could the problem follow the DN? I'm using the DN that was on 302 and moved that DN to 241.

what about the wiring to the jack and is this a bix block?

No bix involved. All 66 blocks.

I have moved to a new port on the system and a new pair all the way from the MDF to the IDF and moved to a new jack/station wire as well. Also new base cord when I replaced the phone.

Have you changed the 25 pair cable? Are there any junctions throughout the path....been there, done that. Had 2 x 25 pair connection points, 1 of which was well hidden & corroded. When you changed the port did you leave it in service as that extension number for awhile to see if it worked (but with a different DN)?

"could the problem follow the DN? "
As I said above "or corruption on the DN/Port" so yes either or can have corruption so if it's the DN then yes it will follow.

When you move the phone to a new port you should be turning set relocation off first and do not re-assign 254.

Change DN 241 to 254, this should put 254 back onto PT 302 and 241 back onto PT 121
Name 254 as CORRUPT and tag port 302 the same.

See if 241 on PT 121 functions as normal, it it does then leave it as is.
Assign Answer DN of 254 on 241 so they can still receive calls as if they were still 254.

Fini