User's Manual

Keeping track of states 87

tests with Internet Explorer, you must disable the proxy server for local

addresses or specify the IP address of the publisher in the bypass list.

Keeping track of states

Both publisher and subscriber keep track of the state of the other party.

This leads to a so-called "image" of Boolean settings of publisher and

subscriber.

Subscriber

On the subscriber level, there is a state represented by P:0 and P:1,

indicating whether the publisher can be reached. P:1 denotes the

publisher is available, P:0 denotes the publisher is unavailable.

Appropriate registry settings associate an environment to each image.

Optionally an SQL script can be defined to run during switching

environments.

The registry definitions are shown in Figure 88 "Registry definitions" (page

87).

Figure 88

Registry definitions

In Figure 88 "Registry definitions" (page 87), an example is shown

with one Publisher and two Subscribers; Subscriber 0 has an image

for handling P:0 and P:1. This example shows the settings when the

subscriber cannot connect to the publisher. The environment Site 1

– Environment 10.110.50.140 (backup) is associated and SQL script

Messenger_CFG_sql is defined.

Publisher

On the publisher level, a similar registry image is used. However, as a

Publisher is often in contact with multiple subscribers, the available images

grow exponentially, as the state of publisher and every subscriber forms a

number of combinations for each Boolean state.

Nortel Communication Server 1000

DECT Messenger Installation and Commissioning — Book 2

NN43120-301 02.01 4 June 2010