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DECT Messenger overview 67

In Figure 12 "Example of logical representation of module links" (page

66), four DECT Messenger modules are shown (eCAP, eKERNEL, eIO,

and eDMSAPI). These modules are grouped around the eKERNEL. Each

input/output module (eCAP, eIO, eDMSAPI) communicates with the

eKERNEL through a socket. The default port numbers are shown in Figure

12 "Example of logical representation of module links" (page 66). The IP

addresses are the same if the modules are all on the same PC, but the IP

addresses are different if the modules are on more than one PC. After a

module starts, it contacts the eKERNEL and exchanges data. During this

data exchange, the module indicates the IP address (PC) on which the

module is found.

The illustrations show an example with a site and two areas defined.

These concepts are defined as follows:

•

Site

The site is the place where the eKERNEL resides. A site has a fixed

relationship with only one eKERNEL. If you have more than one site,

you have more than one eKERNEL. Also, you can have only one

eKERNEL for each PC. This results in a fixed relationship among site,

eKernel, and IP address (PC).

Although you can have more than one site in a network with PCs, only

one site can be active at a time. With only one site active at a time,

you can set up a second eKERNEL (that is, a second site) offline. After

the configuration is set, you can shut down the first site, and start the

second one.

Table 8 "Example of the site definition table" (page 67) shows an

example of the site definition table on the DECT Messenger PC, which

shows the link between a site and the IP address of the computer

where the eKERNEL for that site resides.

Table 8

Example of the site definition table

Site

IP address

1 192.168.1.99

2 192.168.1.34

• Area

An area is a subdivision in a site. An area refers to a connection

from an eDMSAPI module to a PBX. For each PBX you must create

an area. The eDMSAPI modules can exist on the PC where the

eKERNEL is running, and also on another PC.

Referring to Figure 12 "Example of logical representation of module

links" (page 66) and Figure 13 "Example of module links (practical)"

(page 66), the site and area structure is shown in Table 9 "Site and

Area structure" (page 68).

Nortel Communication Server 1000

DECT Messenger Fundamentals

NN43120-120 02.01

11 May 2009