I need to re-program the entire system. New employees, new extensions, get messages from phones that have passcodes and the employees have left the job. Is there a passcode that overrides the ones that are programmed in?

You'll have to re-assign the ext. no. to the new jack no. in the pbx.

The program your looking for is #310 VMS cover enter in the new extension number and press 1. assigned

You are missing a lot of information, but here goes. Your message light is unlikely broken in a new phone. Have someone ring your extension and press "4". Now look at your phone and press MESSAGE. The display tells you who left the message and you get 2 options on your soft keys to call or erase the message.

Now, here's the part you left out. What is leaving the message? It could be coming from CO based voice mail, a TVA system, or a SVM card. If it's a TVA voice mail system, it has to be programmed with your mailbox and extension (usually the same). A message left in the General Delivery Mailbox doesn't light anything unless it's programmed to do something, and a message left in your box usually works if it's properly set up to begin with. We try to set up our TDA's to eliminate GDM messages, so that means that Call Forward lights must be lit at every extension that needs voice mail and there's always a choice to direct callers to extension 101 or some other mailbox but the GDM. If it's CO based, you bought the wrong system, and an SVM card has a set of instructions to assign extensions to slots.

Most likely you'll find the missing information in the Programming Manual of the voice messaging system.

Carl

Each mailbox password is held in the system programming of the voicemail system. You need the system admin password for voicemail. Dial the access code for voicemail, if from a phone with voicemail then press * to get to the main greeting. At the main greeting dial * then the system admin mailbox number which is 99 for 2 digit ext numbers or 999 for 3 digit ext numbers or 9999 for 4 digit ext numbers then you will be prompted for the system admin passcode(default 1234). Press 2 for add/edit/delete (Never press 1 for new installation or you could delete all current voicemail programming and messages). Press 2 to edit mailbox, you will be prompted for the mailbox to edit, enter the mailbox number. Press # to skip to the passcode reset, enter the new passcode or press * to reset to default(999) then press # for each of the remaining parameters until you are returned to the mailbox menu which prompts for press 1 to add mailbox, 2 to edit mailbox, and 3 to delete mailbox, then hangup.

If the extension was a swap of the old M7310 with a new(ish) M7310 no additional programming should be necessary. However if the phone was replaced with another type of nortel set(M7208, M7324,T7313 etc.) then the phone will default to its base features. To re-program the feature keys press feature *3, the button you wish to program, and the feature code for that button

In my workplace, when you move the Nortel M7100 phone, the programmed info (extension number, etc) moves along, just like if I was rewiring all phones. Have you tried just to unplug the phone and plug it on the new location? Here the extension number moves along with the equipment... (Nortel Norstar M7208 and M7100). Good Luck!

Delete the mailbox for this extension then re-create entire mailbox.

On the Merlin Mail system the password is usually either the same as the extension or 779. Let me know.

Kindly visit the link below and follow the instructions on how to alter the mailbox.

https://data2.manualslib.com/pdf/12/1133/113251-nortel/m7310.pdf?c2f689d5534c259245988fe5f85eed

To change the names on the NEC Dterm 80.

Feature, Conf, #, 0, *, 8974, LINE 4, 18.

Select Conf to go to the name you want to change.

Select Hold to erase the characters.

Select Transfer to save it.
Once you save, make sure you go back to "18".