That ten code list is inaccurate. The only time I have ever heard BFD use a ten code is a 10-15. That's used to announce the death of an active or retired member. I don't know that they still do that on Channel 1. Here is an example from Facebook.
Boston still taps out boxes and additional alarms on Channel 1. Those are the "beeps" that you are referring to. I don't believe that they use the term "Working Fire" any longer. Initial station alerting is done by computer to printers in the station and repeated on Channel 7 using a computer generated voice.
They use Code A, Code B, and Code C as the page shows.
They use the National Fire Incident Reporting System (NFIRS) as does every fire department in the country.
Here is the complete list,
NFIRS Incident Types, Actions Taken, Property Use Codes
I think that covers what you were looking for. If BFDS5 comments, his post will be 100% correct, including any corrections to my post.
Thanks for the link. I notice that the 10-4 code is missing as well as the 10-15 code.
I would still like to know if BFD still broadcasts a beep code for a working fire.