is as Simple as it Seems
Each key which is to lock a locking cylinder must
be mapped to the locking mechanism of the cylinder. If,
for example, 500 keys lock a communal entrance door, then
all 500 keys must be mapped to the locking mechanism of
In addition, each individual
key must still fulfill individual access authorisations,
eg. office or house doors.
This requires high quality
development and high precision during production. In order
to meet these requirements, DOM Sicherheitstechnik uses
specially developed mathematical relational information
Master Key System
In the case of owner occupied houses and small
to medium businesses, generally only a few people have
access authorisation to all areas. A master key system
is best suited to use in such cases.
The technical complexity here
lies in the master key function. The master key must operate
the locking mechanisms of all the individual locking cylinders,
whilst no other key is able to open any lock other than
the one it has been specifically cut for.
A high level of convenience
is afforded by the fact that the holder of the master
key can lock or unlock all of the cylinder locks with
just one key - the master key. User convenience can also
be increased by integrating office furniture locks into
the master key system.
Central Locking System
In rented apartment blocks and residential homes,
many individual people must unlock one or more central
doors, eg. a main entrance gate or basement doors. But
no tenant or owner must be able to unlock the door of
another apartment with his key.
In such cases, a central locking
system is recommended.
The technical complexity of
a central locking system lies in the central functions.
Each individual key must operate the locking mechanism
of the cylinders of all central doors, so that it can
perform the locking function.
Each tenant or owner has only
one key with which to lock or unlock both the central
doors and the front door to his apartment, letterbox,
basement area, or even his dustbin.
By reducing the number of keys
to a minimum, security is automatically increased, as
there are less keys which can be lost.
Central Master Key System
With residential estates or large apartment blocks,
and even with decentralised widely scattered organisational
units, there is the problem that, for example, the manager
normally needs different keys to be able to lock the different
front doors, washing rooms, heating rooms, etc.
In such cases, the use of a
central master key system is recommended.
The central master key system
is in principle, a combination of several central locking
An apartment complex may have
a number of separate buildings - building A, building
B, etc. Each tenant will have a key which operates the
front door for the building in which they live ( A, B,
C etc.), as well as for their individual apartment, locker,
garage etc. The security guard or caretaker, can have
a single key which will operate the front door lock to
all buildings (as well as any other central areas), but
not any of the apartments, lockers or garages. At the
same time, no tenant from building A can operate
the lock of the front door of building B, and so on.
The distinctive feature in
this type of system is a "technical" master
key, which operates all the central doors within the whole
system, but not the tenants' or the owners' individual
apartment doors or basement doors.
Here the technical complexity
lies in the "technical" master key function.
In addition to the individual keys, the function of the
"technical" master keys lies in the ability
also to operate the locking mechanism of all central doors.
General Master Key System
Within large organisations clear and definite
organisational structures are essential. Production, administration,
logistics centre and EDP areas increasingly operate in
different time periods and in different physical locations
from one another. This necessitates unrestricted access
to sections of a company by employees, departmental heads
In such cases we recommend
the use of a general master key system.
In principle, the general master
key system consists of several master key systems. There
are essentially three different heirarchical levels:
The general master key operates all
locking cylinders in the whole locking system.
The master group key operates all locking
cylinders of a company area, for example, those
of production or administration.
The group key operates all cylinder
locks of a department, for example, of the accounts
department and the design department.