User's Manual

DECT Messenger overview 65

• eWATCHDOG

The eWATCHDOG is a software module that works with the Watchdog

card. The eWATCHDOG sends a code to a V.24 interface (COM

port) on the DECT Messenger PC. 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 12 "Example

of logical representation of module links" (page 66) shows logical links

between the modules. Figure 13 "Example of module links (practical)"

(page 66) shows a practical example of module linking.

Nortel Communication Server 1000

DECT Messenger Fundamentals

NN43120-120 02.01

11 May 2009