I have a NEC DTU-16D-2 phone system. The Speaker

Yes, the NEC DTU-16D-1A can be used with a standard PSTN line. You will need to program the phone system to recognize the PSTN line instead of the ISDN2 line. Here are some steps you can take:

1. Access the programming mode on the NEC Xen Alpha system by pressing "Speaker" and then "7" on the main phone.
2. Enter the system password, which should be provided in the user manual or by your system administrator.
3. Press "Speaker" and then "3" to enter the line programming mode.
4. Scroll through the line options using the arrow keys until you find the option for PSTN. Select this option.
5. Save your changes by pressing "Speaker" and then "Store".

Once you have completed these steps, your NEC DTU-16D-1A handsets should be able to connect to the PSTN line and function properly.

In the link

https://www.google.com/search?q=nec+dtu+16d-2+turn+on+voicemail&

Manual

Dtu-16D-2 Tel - NEC Electra Elite IPK II System ... - ManualsLib

https://www.manualslib.com > manual > Nec-Electra-Eli...
NEC Electra Elite IPK II Manual Online: Dtu-16D-2 Tel. This digital Multiline Terminal has 16 programmable line keys (each with a 2-color LED), ...

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  NEC 16D and 8D Quick Start User Manual - ManualsLib

  https://www.manualslib.com > ... > Telephone
  View and Download NEC 16D and 8D quick start user manual online. Multiline Telephone. 16D and 8D telephone pdf manual download. Also for: Dth-32d, Dth-16d, ...
  
  

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https://www.manualslib.com/manual/110148/Nec-16d-And-8d.html


NEC 16D and 8D Quick Start User Manual

Hello, That would be a system ring group programming feature. It would depend on the type of phone system you have. NEC Elite 192, Elite IPK, Elite IPK 2. There are different platforms and this would determine how to program it.

Would you expect a Nortel phone to work on an NEC sysem? The phone is digital and it requires an NEC system to work. Nortel M7208,7310, T7316 are phones that typically work on Nofrtel digital systems. They also require a digital port.

Carl

The phone model is not enough information.

that phone can be connected to a few different phone systems, each with their own solution. please be more specific.

you would need to enter system programming mode and change MB 1-8-31 to external. The internal music is pretty bad. This works on elite and ipk platforms. It depends on your system type. Look at the phone system and see what letters it has on it.
ldtsnj.com

Turn your mic off .Your phone will beep when get intercom calls but your mic is off so they can ear you.

headset key has to be programmed on a key for it to work properly

hi,1.to adjust the ring tone volume. from your phone set,press speaker dial 601.press the arrow key up or down to adjust. 2. if your station is programmed as system admin phone,then you can press feature 80 feature.to toggle between day or night.do not press speaker button while doing this. 3.the headset port need to be program,or you can do without it,by purchasing the headset came with the adapter and connect thru the handset cord. the new model is DTH-16D. CAN email me if you need a new phone, [email protected]