Emergency Calling Overview

This topic describes concepts that you need to know before managing emergency calling, including requirements and restrictions, basic emergency calling, and enhanced emergency calling.

Requirements

To make an emergency call, you should make sure the following requirements are met:

  • IP phones or soft phones must be registered to Yeastar K2 IPPBX.
  • At least one trunk should be configured for an emergency number.

Basic emergency calling

The basic emergency service only connects a caller to the local Public Safety Answering Point (PSAP), but no location is provided. Emergency callers must be ready to provide their location information for the PSAP. PSAP then arranges appropriate emergency response after communicating with the callers.

For more information, see Set up Basic Emergency Calling.

Enhanced emergency calling

Enhanced emergency service is only available for specific countries and regions, such as E911 in North America, E112 in continental Europe, E999 in England, etc.

For an enhanced emergency call, PSAP can immediately pinpoint the caller's location based on the calling number.

Important: For wireless IP phones and soft phones (such as Linkus), the emergency caller's location can only be determined by the Emergency Outbound Caller ID configured on the PBX.

For more information, see Set up Enhanced Emergency Calling.

Terminology

The following list defines the key terminology for enhanced emergency calling.

PSAP
A Public Safety Answering Point (PSAP) is responsible for receiving emergency calls and arranging appropriate emergency response, such as dispatching a police, fire, or ambulance team.
ERL
An Emergency Response Location (ERL) is a specific geographic location to which a emergency response team may be dispatched. To provide the PSAP with the emergency caller's precise location, you may need to set multiple ERLs.
ELIN
An Emergency Location Identification Number (ELIN) is the phone number (Caller ID), which is associated with an ERL. When an emergency call is made, the ELIN is displayed on the PSAP side so that they can match the caller ID with the ERL.
Note: ELIN is also helpful for PSAP to call the emergency caller back in case the call is disconnected.
Examples of ERL/ELIN mapping:
  • One ERL for each building

    All the users in the same building are associated with the same ELIN.

    ELIN ERL
    6085225672 No. 63-2 Wanghai Road, 2nd Software Park, Xiamen
    6085225673 No. 63-3 Wanghai Road, 2nd Software Park, Xiamen
  • One ERL for each building floor

    All the users in the same floor of a building are associated with the same ELIN.

    ELIN ERL
    6085225682 5/F, No. 63-2 Wanghai Road, 2nd Software Park, Xiamen
    6085225683 4/F, No. 63-2 Wanghai Road, 2nd Software Park, Xiamen
  • One ERL for each room

    Each user of a room has a unique ELIN.

    ELIN ERL
    6085225692 Room3005, No.1 Guanri Road, Software Park Siming District Xiamen
    6085225693 Room3006, No.1 Guanri Road, Software Park Siming District Xiamen