Man isn't it the truth. I use to hear chases and broadcasts for all kinds of stuff now I am mostly hearing DUI's and stuff like that. ISPERN just isn't utilized like it was used to be. I really miss it but with communications systems evolving as quickly as they are there are probably other methods being utilized now like MDT's as you said but also a lot of cell phones and encrypted channels have also found there way into the police comm.'s, definitely not like it used to be.The last few stolen vehicle broadcast I've heard D-16 put out appeared to be on Starcom 16-A only? With all the consolidation of dispatch ISP may have changed procedures for dispatches on ISPERN. With most patrol cars having MDC/MDT a lot of local Officers have quit scanning ISPERN.
In the old days you couldn't lock out ISPERN but things change and ISPERN is not utilized as much as it used to be.