User's Manual

386 Module - eFR

In a TCP client/server connection, a TCP Server listens on a specific port.

A client can reside on the same system or on another system, and make a

socket connection by specifying the address and the port the server listens

to. The following figure illustrates that the server listens on port 3102.

Figure 127

TCP client/server connection

If connection is successful, a connection is established between the

client and the server. In a NETSTAT command window, a line appears

illustrating that a TCP connection is found on port 3102 with the state

ESTABLISHED.

Figure 128

NETSTAT command window

The previous figure shows the client address and port in the third column,

10.1289.65.159:4817. In many environments the client is not bound to

a fixed port, and receives a random assigned port number, for example

4817.

The capability of eFR monitoring client connections of NETSTAT is

oriented towards application environments, with a persistent socket

connection. For example, DECT Messenger is an example of a software

suite based upon client/server architecture, where the majority of client

modules must be connected permanently with predefined ports on the

server. Typically you must monitor the TCP clients (eDMSAPI, eCSTA,

eSMS, eCAP

…) modules connected to eKERNEL on the configured ports.

Sample e-mail

A sample e-mail is shown in the following figure.

Nortel Communication Server 1000

DECT Messenger Installation and Commissioning — Book 1

NN43120-301 02.01 4 June 2010