Explain access to the system, i.e. emergency call number and non emergency call number

Access to emergency call number
The emergency call number is a public
telephone network
that allows a caller to contact local emergency services
for assistance. The emergency number differs from country to country; it is
typically a three-digit number so that it can be easily remembered and dialled
quickly. Often the system is set up so that once a call is made to an emergency
telephone number, it must be answered. Should the caller abandon the call, the
line may still be held until the emergency service answers and releases the
call.

An emergency telephone number call may be answered by either a telephone operator or an emergency service dispatcher.
The nature of the emergency (
police, fire, medical) is then determined. If the call has been answered by a telephone
operator, they then connect the call to the appropriate emergency service, who
then dispatches the appropriate help. In the case of multiple services being
needed on a call, the most urgent need must be determined, with other services
being called in as needed.
In many parts of the world, an emergency service can identify the
telephone number that a call has been placed from. This is normally done using
the system that the telephone company uses to bill calls, making the number
visible even for users who have unlisted numbers or who block
caller ID.
For an individual fixed landline telephone, the caller’s number can often be
associated with the caller’s address and therefore their location.
Access to non-emergency call number
Access to non-emergency call number is mostly through mobile phones
which can be used in countries with different emergency numbers. This means
that a traveller visiting a foreign country does not have to know the local
emergency numbers. The mobile phone and the
SIM card have a preprogrammed list of emergency numbers. When the user tries to
set up a call using an emergency number known by a
GSM phone, the special emergency call setup takes place.
The actual number is not even transmitted into the network, but the
network redirects the emergency call to the local emergency desk. Most GSM
mobile phones can dial emergency numbers even when the phone keyboard is
locked, the phone is without a
SIM card,
emergency number is entered instead of the
PIN or there isn’t a network signal (busy network).
Most GSM mobile phones have 112, 999 and 911 as pre-programmed
emergency numbers that are always available. The SIM card issued by the
operator can contain additional country-specific emergency numbers that can be
used even when roaming abroad. The GSM network can also update the list of
well-known emergency numbers when the phone registers to it.
0 0 votes
Article Rating
Subscribe
Notify of
guest

0 Comments
0
Would love your thoughts, please comment.x
()
x