Hello, my name is Rusty. Lift the handset. Press the day/night mode button, then press 1 to switch it into day mode. Hang up the phone to activate day mode. 1 is day, 2 is night, in case you want to switch it back. Let me know if you have any questions.
I'm looking at the DT310, there isn't an option in the display for day/night?
Give me a few minutes while I take a closer look at that exact model.
I found an access code sheet, but I don't know if it's for your phone. While you're waiting, pick up the handset and dial *79. I'll keep looking, let me know if that works.
Just so I know for sure, this is an Integra Telecom?
There are a bunch of 32-D models, I just wanted to make sure to save us both some time. So, I'm looking for an NEC DTL-32d-1.
Ok, do you see a DND button?
I have it locked down to a DND feature button. Can you double check for that button? If you don't find it, it will require administrative programming, which is a bit above my pay grade.
I'm going to have to open this question back up. Don't rate my answer, and you won't be charged for my time.