My former partners wrote their own code to run on Linux when they started having problems servicing VA hospitals using windows programs. They would start getting trouble calls the day after Bill and company pushed out updates which buggered up the paging program.
Our county is leaning towards dropping paging for our rural volunteer departments as the system ages. They think relying on I am Responding is the cure, but Verizon service is piss poor in one town. I'm working on offering them an alternative to use a local xmtr at each station since that's the area that needs the notification, not a county wide system.
We built our services out of the need to alert many jurisdictions in parallel to activate strike teams, task forces and distribute general situational awareness notices for a state Mutual Aid (Chief's) association. That was back in 1998 We are still doing this for 911 Centers, State EOCs, DMAT teams and other services today. We are not a mass notification tool and do not have a Opt-In process but rather a tool so that agencies can follow the chain of command and make appropriate entries. One key function now in the package is Delivery Confirmation to "most" cellular users (it's carrier dependent), With exceptions available in real time, although most customers use the daily exception summary report.
A user can have up to nine unique wireless devices and an email contact, the user is then available to be mapped into groups and groups of groups can be built. Think "Joe User" in the A-Shift group, and the A-Shift Group is rotated through On-Duty and in the All Call groups.
Per the carrier agreements we are not Life Safety notification, our mission is secondary and tertiary to the primary dispatch process used by the portion of our customers who are public safety agencies. Also, I should note that 911 dispatch centers in the US operate under the guidelines and procedures established by the National Fire Protection Association “Standard for the installation, Maintenance and Use of Emergency Communications Systems” (NFPA 1221). In addition these centers undergo stringent operational reviews and ratings conducted by the Insurance Services Office (ISO) which does not currently recognize solutions such as ours.
PM me if you want to talk about how we can help you.