I have seen several bids that just simply require software to be provided to the local police and programming for remote access. I would think this would become more common with fusion centers popping up. I have been talking to one city with a fusion center and I recommended MAS or Immix.
The bigger question is how does the police access the school surveillance system?
Are the police given VPN access to the school? Does each police vehicle have this set up? Do they load up the proprietary software for that school?
As much as I'd like to have first responders access from their vehicles, it doesn't take long to imagine an emergency happening and the access not working because someone didn't have the right version of some proprietary app in their squad car. For now, we're going to focus on having access at dispatch and communication centers, and anything that ever makes it to a car is going to need to be some web based any-browser-could-access thing we've not really settled on yet.
...and then you need to consider what happens to your recorder in an emergency when 20 remote users choke it through simultaneous use.
i would suggest to the original poster that he specify that the system can be accessed remotely by X number of simultaneous users, including first responders, and the judge the responses on whether they have done it before or whether they could articulate plainly the issues involved.
With Genetec Security Center we have a bunch of school district customers where the local municipality PD (county or citywide) was also using Genetec for their VMS and Genetec has a feature called Federation that allows the PD to still authenticate to their main Genetec system and then have a single sign on to the School District system. This single-sign-on can be set to only be available in a crisis situation, or only to specific cameras/doors/etc. Through the Federation connection they can also receive door-propped or door-forced alarms after hours, but they dont have any configuration rights, just read only-viewing rights. This generally makes the School District board of education and teachers unions happy.