[Scan-DC] MCPD Codes

[Todd Sniffin]

10-40 is welfare check
10-40 is I'm ok

If the emergency button is pushed the dispatcher will ask "XXXX unit, what
is your EB status?"  If they ask twice and get no response the dispatcher
will process it as an officer in trouble (10-50) and send the world.

On the fire side a request for immediate police response if you are
personally in danger is a "signal 3" in addition to/or instead of pushing
the EB.