Can you page using the DISA feature:

Yes, But don't remember how, it's been too long.

Memory is not too clear but think it is you follow single line codes to perform DISA functions.

I had a customer who tried to use disa would not work. We used a sil phone assigned it a DID or just dial EXT. off auto att. we used a 1 zone valcom page control this worked well for us.
Juno

The only way I was able to page over disa was to punch down an analog port as a co port. Then in disa dial 90XX (xx for the co port). This will give you sli internal dialtone. Then just dial 60 to page. 75 is meet me page.

I think it's *6X, I have it working at two sites, will confirm and update