You can not have an analog station ring with a digital extension. Here are some of the options you may have.
a) as mentioned, use a BESCB1A with an external horn. You will need a DP5000 series phone or a BHUE adatpor for DKT-3000 series phones. I have used this with IP phones for I paging.
b) also mentioned, open the phone and attach the speaker leads to an amplified speaker.
c) Change the digital extension to something else (330 for example). Assign 230 to an analog port. Put PDN 230 onto 330 so it will ring when 230 is called, and set VMID to 230. The display will say 230, but it will more or less work like ext 330.
d) Use a age Industries PI-DKT adapter to convert a digital extension to a paging port. Assign an extension to this digital paging extension and add ext 230 PDN on to the keys assignment. Whenever ext 230 is call the extension attached to the PI-DKT will also ring and will ring over the paging speaker.
Off the top of my head, these are your options. I would go with the BESCB1A option if you can put the horn near the phone.
If the paging amp is too far from the physical phone, I would consider using the PI-DKT, assuming they are still available. Or, if not, use an old phone and cut the speaker leads, and assign the PDN 230 to this phone extension.
Last edited by newtecky; 09/10/17 03:34 PM.