As long as you have a spare analog trunk and spare analog station you can fool the system to do what you want
Here is an interesting work around. I have tried this and it works as advertised.
Full Credit for MitelInMyBlood for this. It is quite creative.
faq1329-5872
Instructions with my comments ***
1) start by programming an ONS port as a non-busy ext; give it a D-I-D number
*** Agreed
2) next create a new analog loop-start 2-wire trunk
*** Agreed
3) assign this trunk its own separate trunk service number (mandatory)
*** Agreed
4) program an unused DN (recommend non-DID, and preferably something non-guessable) as a single line RING appearance on the superset(s) where you want the NBE to appear, i.e., use a number like 10*0 (one-zero-star-zero)
*** I would recommend that the Key Appearance be programmed as a Key System Line. Additionally, I would number it something like 1*XXXX where XXXX = DID. If the DID is 1000 the key is 1*1000
5) add this "funny number" to your teldir, name it whatever you want and be sure to make it "private" so no one will see the trick number and try to dial it directly
*** This step dates back to the Opsman Days to make the number dialable from other systems. Naming the Key is still good practice and I would add a . (period) as the first character. The (period) will prevent the name from appearing in the phone book.
6) assign this new DN to the non-dial-in answer points (day/Night1/Night2) in the Trunk Service Assignment form for your new LS trunk that you created in step 2 above
*** Agreed
7) at the MDF bridge the LS trunk directly onto the PLID of your NBE
*** Agreed
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What's most important is that you realise ... There is no spoon.