Access control applications
3.14 EST3 Installation and Service Manual
Central monitoring station
Description of the application
An access control system can transmit different kinds of event
information to a central monitoring station (CMS). The basics
for such a system are shown in Figure 3-3.
Control panel
3-SAC
3-MODCOM
CPU
Power supply
Hardware configuration
SDU programming
ACDB/KDC operation
Other factors
X
CRC
Card
reader
Central
monitoring
station
Programmed rules
for transmission
Telephone line
SAC bus
ccess denied event
Formatted CMS message
Figure 3-3: Access control reporting to a central monitoring
station
When a reportable access event occurs, the event message travels
from the CRC to the 3-SAC. The 3-SAC passes the message to
the CPU which executes a predefined command list. The
command list specifies the details of the message that is sent to
the 3-MODCOM for transmission to the CMS.