Our company has purchased a Nortel Norstar Meridian M7310 phone system, that has been previously used. We didn't know, but it did not come with voicemail, so it is tough to get calls when I am not here. How do we set it up so that each phone in each office rings whenever a call comes in on any of the lines? Please advise. [email protected]

Programming is done on M7310, M7324 and T7316 sets.
To set up ringing you need to 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 wish to program ringing on. Press the show key (top right arrow)
The display should sat LINE ACCESS
Press the show key (top right arrow) .
The display should say LINE ASSIGNMENT.
Press the show key (top right arrow) .
The display ask for a line number. press list
The display should say line 001: appear only
press the Chng key til it says appear and ring
press next key (lower right arrow)
The display should say line 002: appear only
press the Chng key till it says appear & ring
Continue til all of your active lines say appear and ring
press the heading key(top left arrow) till the display asks for another extension number
repeat line programming for that extension
press the release key when finished