i have read that i can wire a bell unit in to a ata2 unit which i plug in to my external ringer on my phone but i wasn't sure how i can connect the bell to the ata2 unit, any ideas??

You buy a bell that works on a phone line or analog phone extension.
Example: https://www.wheelock-products.com/catalog/product/TB-593.aspx


Then it acts like an analog phone when plugged into the ATA2 unit. Then you make the ATA2 unit ring when a phone line rings or an extension rings.

Now if you are talking about the phone systems AUX RINGER, then you buy a ringing unit that works via a closed contact. Then wire that unit to the AUX RING port off the Norstar. Then make the phone line or extension ring the Aux ringer.

Just make sure you don't run high voltage or high Amps through the Aux Ring contacts.

yes i want to use a ringer on the AUX RINGER but i cant find a "ringing unit" anywhere do you know where i could find one?

dont worry ive got it to work now in my office but i cant get it to work on my other phone in the shop and i cant find out how to turn the aux port on or off