Need to reset nec phone - NEC Electra Elite DTU 16D-2 Corded Phone

Easiest way to reset the phone is to unplug it then plug it back in. If you are talking about resetting the voicemail associated with the phone extension, that's a little more involved.If you need the voice mail reset, you need to have the voice mail administrator (typically the receptionist) go into his/her voice mail and choose the MGR option if using the display "softkeys" and follow the prompts to reset the users security code or voice mail acct. If softkeys aren't available, follow the voice prompts to "system manager" and either delete the security code or reset the extensions voice mail entirely.