Norstar 7310 forwards to Voicemail

"Q: My Norstar Startalk, Flashtalk, or voice mail says my mailbox is not accepting any more messages. I deleted all my messages, but callers still cannot leave a message. Why?
A: Check with your voice mail administrator. Chances are another Mailbox on the system used up all the message storage space. Usually it's the general delivery mailbox that hasn't been checked for messages on a regular basis."
Frequently Asked Questions

The following discussion suggests that voicemail can be inactivated, and cab be re-activated by logging in and pressing '4'
Startalk Flash Won answer Nortel Phone System Tech Support

This says that the mailbox must be initialized.
http://www.uniquecomm.com/docs/Startalk_Flash_Quick_Reference_Guide.pdf

You are more than likely gonna have to go thru your company's IT person and have them update it to what you want. I am sure it is password protected.

Check the forward no answer setting for number of rings on each extension that has ringing lines. The number of rings should be more than the auto attendant is set to answer with.

Depending on your voice mail system, It can be handled using a different table for the new companies phone line and use different greetings for the four time slots.

Chances are you're logging into your voicemail system and pressing the REC button ... that's to record a greeting that you send to someone else's voicemail box. You need to login to your voicemail, go to ADMIN (or dial 8), then select GREET, REC, PRIM, ... should be straight forward from then on. If you have trouble still, send me more details about what you're doing.

If the voicemail it goes to is the on site voicemail, then try canceling call forwarding of the phone associated with the mailbox that gets the message by pressing FEATURE #4 from that phone. If the voicemail it goes to is an external voicemail as in that of a cellphone then try canceling line redirection by pressing #84 then press the line to cancel redirection on. Repeat for additional lines.

Sounds like the call forward no answer isn;t set up on your extension. The first thing to do is to find out what the voice mail pilot number is. That's done by pressing feature 982. The display should say "set:xxx". The set number provided is the voicemail pilot number. Next you'll need to enter system programming. Programming is done on 7310, 7324 and 7316 type sets. Enter programming by pressing the feature key followed by **266344.When prompted to enter the password enter 266344.
The screen should say TERMINALS&SETS. The 4 top line/feature keys are now used for programming
At the terminals&sets prompt, press the show key (top right arrow). The display should now ask for an extension number. Enter extension number you want to change call forward no answer on.
Press the show key (top right arrow)
The display should say LINE ACCESS
Press the next key (bottom right arrow) .
The display should say CAPABILITIES.
Press the show key (top right arrow) .
The display say foward no answer.
press theshow key (top right arrow)..
The display should say none. Press the chng key and enter in the voice mail pilot number. press the show key again (top right arrow) To review the rings til forward. Press the chng key if you wish to change the ammount of rings til answered. Press the release key when finished

This is done in station administration. F config side of the system. Do you have access to system programming?

If the mailbox is made, you need to check the programming under sets, FWD no answer, that needs to forward to the extension on the voicemail.

Cycle the power on the voicemail system. If that does not work, you may have to replace the voicemail power supply, or send the voicemail system for repair.
Good Luck!