GE Security EST3 - Central Monitoring Station

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
A
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.