Can you dialers work with VOIP.
Yes, but you’ll need an ATA (Analog Telephone Adapter). You can either purchase an ATA and have your IT department configure it, or buy a third-party plug-and-play ATA that works right out of the box as long as you have an internet connection. See the link below for programming instructions.Sample ATA
https://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
Click on link to download the Instructions
ATA instructions Setup
3rd Party ATA
https://www.voiply.com/