The police could not communicate with the firefighters on 911 IIRC..I believe one problem is not having compatible equipment..
Well what did they do with all the monies allocated by HSD for common communication. I'm OEM over here in NJ and all our communication is common. If they do not have adequate equipment then the money was wasted or used to buy votes.
In addition, there was the FD and PD cultures did not encourage communication. Apparently this was nothing new. I'm in a doctoral program in information science and there are already academic studies being done about 9/11 as an example of how inter-related organizations that should communicate freely w/each other, don't. The easy fix is the technology. The hard part is changing the organizational culture.