Public safety answering point

It can also happen that when 112 is dialed in then a logic is implemented by mobile or network operators to route the call to the nearest police station.

In Canada and the United States, the county or a large city usually handles this responsibility, and its PSAP is sometimes called a radio room.

In other countries, this is the responsibility of other types of local government, and the particular setup of the telephone network dictates how such calls are handled.

There is also now the ability to answer text messages at some PSAPs, which is useful in areas where weak signal strength due to distance from the nearest cell site causes fringe reception, resulting in blocked or dropped calls.

[3] The National Emergency Number Association (NENA) long-term solution for emergency calling, referred to as the i3 Solution, assumes end-to-end Internet Protocol (IP) signaling from the Voice over IP (VoIP) endpoint to an IP-enabled Public Safety Answering Point (PSAP), with callback and caller location information provided to the PSAP with the call.

While the i3 Solution assumes end-to-end IP connectivity, and it is expected that an increasing number of PSAPs will evolve to support i3 functionality over time, legacy PSAPs must continue to be supported as originating networks and the Emergency Services infrastructure migrate toward IP.