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DCN Next Generation Open Interface Release 2.4 Text Status Display

en | 206

Bosch Communications Systems | 2007 February | SRS_LDINF | Du080902

2. TEXT & STATUS DISPLAY FOR A REMOTE INTERFACE

2.1 Introduction

The Text & Status Display Remote Interface is part of the DCN Next Generation software that

allows for another controlling entity outside the CCU, not being the DCN Next Generation

Control PC, to use the Text & Status Display application.

2.2 Remote Text & Status Display Control

Text & Status Display is the application that provides a means of displaying conference-related

information on character displays located in the conference venue. Typical configuration issues

are e.g.: storing display settings, clearing displays etc. More details on the complete LD

application can be found in the user manual.

Configuring Text & Status Display with a remote interface is achieved by means of calling a

defined set of Remote Functions and acting upon a defined set of Update Notifications. The

general concept of Remote Functions and Update Notifications is described in [SRS_INF].

[SRS_INF] also describes the protocol and hardware conditions concerning the remote

interface.

Together with this remote interface, there are at the moment two locations in a fully

connected CCU where LD can be influenced. These locations are:

• A remote controller (which can be the control PC) connected using an Ethernet (in case of

MCCU) or RS-232 (in case of SCCU) connection. This remote controller uses Remote

Function calls to configure Text & Status Display.

• Updates in applications for which LD displays text and/or status (MM, VT and MD) may

lead to updates in text/status displays and/or update notifications (depending on the

configuration)

To get a fully operational system the remote controller must register itself to the CCU, in order

for it to receive update messages from the CCU.

Remote functions coming from the remote controller can indirectly initiate an update in the

CCU. During the update, notifications are generated and sent to the remote controller.

Unit and user events causing changes in applications MM, VT and MD can lead to LD update

notifications in the CCU. Depending on the configuration of LD, update notifications may be

sent to the remote controller.

During the processing of remote functions on the CCU, update messages may be created

and transmitted. This implies that the response information of a remote function can be

received after the reception of an update notification. The remote controller must wait for the

response of the remote function. After reception of the response appropriate action should be

taken upon the error code returned. The notifications received during the wait for the

response may be processed directly. See [SRS_INF] for details on this mechanism.

This document gives the set of Remote Functions and the set of Update Notifications

concerning Text & Status Display. The (indirect) relation between Remote Function, sent by

the remote controller, and Update Notifications is given in the description of each separate

Remote Function. The (indirect) relation between unit events and Update Notifications (and

the configuration needed to enable these updates) is given in section 4.1.2.

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