
This COM port is connected to a Watchdog card that expects the code within certain time
intervals. If the code is not received within the time interval, the Watchdog card assumes
that the system is down and restarts the PC or activates a alarm indication.
• eTM
The eTM is the Task Manager, which ensures that the DECT Messenger modules remain
active. If a module fails, the eTM reboots the module automatically. You can specify which
modules are monitored by the eTM. The eTM can be installed on the DECT Messenger
PC where the eKERNEL is located, and on other PCs if there are DECT Messenger
modules also running on other PCs. The eTM is always used in conjunction with the
eCONFIG module.
Logging module
The eKERNEL has a built-in logging function that provides technical logging data. For a more
user-friendly logging function, the eLOG module is also available.
• eLOG
The eLOG module generates log files. These files contain information about processing
individual alarms/messages. The eLOG module is part of the eKERNEL.
Linking modules
All the modules are software modules (e-modules such as eCAP). The core module is the
eKERNEL. All other modules are input/output modules or security modules that communicate
with the eKERNEL module. Modules do not communicate with each other, except through
eKERNEL. The communication between a module and the eKERNEL passes through a TCP/
IP socket. (A socket consists of an IP address and a port number.) The modules can be
anywhere in a TCP/IP network. Figure 13: Example of logical representation of module
links on page 62 shows logical links between the modules. Figure 14: Example of module
links (practical) on page 62 shows a practical example of module linking.
DECT Messenger overview
DECT Messenger Fundamentals March 2012 61
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