Slave Dialers - New uses?

[Charles Booth <chasbo@xxxxxxxxx>]

Am cleaning shop; dumpster on premises!

I sure hate throwing out stuff for which I paid good money.

I have a lot of used, but working, slave dialers, mostly Acron DD1 -
DD3.  Any good ideas for making use of these dialers for generating
income, or which could be used for remote signalling, or testing (but
testing for what?).

I may donate some of the items to the local Vocational school for use
by the electrical students.

Before it goes to the dumpster or school, I've been sorting the stuff
into separate very large boxes: audible devices (bells, speakers,
etc.), smoke detectors, keypads, panels, siren drivers, power supply
chargers, relays, etc.

Of all the items that I have removed from my customers premises
(upgrades, faulty equipment) I find that smoke detectors lead the list
by a very large margin.