NEC Visualink 128/384 Engineering Guide

NDA-24233 Issue 2Page v
VisuaLink 128/384 Engineering Guide Table of Contents
Chapter 4:  Error Response Table  ............................................................................ 4-1
Chapter 5:  List of Factors for Disconnection in Table  .......................................... 5-1
Appendix A:  Pin-out Specification ...........................................................................A-1
Appendix B:  Line Speed Specifications...

NDA-24233 Issue 2Page vi
VisuaLink 128/384 Engineering Guide List of Tables
List of Tables
Table 1:  VIDEO Command  .................................................................................................... 2-1
Table 2:  AUDIO Command  .................................................................................................... 2-1
Table 3:  LINE Setting Command  ........................................................................................... 2-1
Table 4:  DATA Command...

NDA-24233 Issue 2Page 1-1
VisuaLink 128/384 Engineering Guide Chapter 1
Chapter 1: VisuaLink Command Fundamentals
Preface
Thank you very much for purchasing the VisuaLink 128 or VisuaLink 384.
VisuaLink is suitable for a conference with one to three people on a site, and it is a device to  realize a 
multimedia communication of video, voice, and graphic information by connecting to an ISDN line.
This document explains the external console of the VisuaLink from a console such as a personal computer.
NEC...

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Chapter 1 VisuaLink 128/384 Engineering Guide
1.3  Physical/Electrical lnterface
The external control port is at the back of the VisuaLink and uses DIN8 pin connectors.  The maximum length 
of the control cable shall be no more than 20 ft. (6.1 meter) due to electric characteristics.  Connector pin 
positions are as follows:
Note:
  Directions of signals are output from VisuaLink.
NO Name Direction Features
1 RS OUT Request to Send
2CS IN Clear to Send
3 SD OUT Send Data
4 GND -...

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VisuaLink 128/384 Engineering Guide Chapter 1
1.4  Communication Format
Communication between a console and VisuaLink 128/384 is done in a start-stop synchronization of the 
following format.
Data Format
Data Length: 7, 8 bit ASCII code
Stop Bit: 1 bit
Parity: Even, Odd, NONE parity
Baud: 1200, 2400, 4800, 9600bps
Note:
 Default setting for VisuaLink is 9600, 8, none, 1.
To change the default setting use the SSPR command.
A: Connect terminal to VisuaLink Serial 2
B: Set terminal...

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Chapter 1 VisuaLink 128/384 Engineering Guide
Command Format
Command: Transmit 4-character commands (only upper case can be used)
Space: More than one space is transmitted between a command and a parameter
Parameter: If a command requires a parameter, a parameter is assigned. (Only upper case can be used)  
However, if parameters are more than one, more than one space is transmitted between parameters.
CR: Transmit Carriage Return Code
 (ODH).
LF: Transmit Line Field
 (OAH)...

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VisuaLink 128/384 Engineering Guide Chapter 1
1.5  Communication Procedure
There is no procedure for communication between a console and VisuaLink as a rule. Therefore, a 
communication line is presumed to be error-free. When it is remotely operated with a modem, efficient 
operation may not be expected when a line error occurs. Because of this, in a remote control, a modem with 
error correction feature shall be used, or VisuaLink shall be checked for operation....

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Chapter 1 VisuaLink 128/384 Engineering Guide
(1) Command 1 is issued using the external control port rather than a personal computer.
(2) If a report is received from the remote unit before a transmission of Command 1, it transmits a report to 
a PC and then transmits Command 1 to the remote unit. It transmits Response 1 to the PC after the 
transmission. However, in parameter error and etc., it immediately transmits an error response. When an 
error response is received, it...

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VisuaLink 128/384 Engineering Guide Chapter 1
1.6  Connecting and Incoming Call Control Basic Sequence
Connecting and incoming call control basic sequence (when the incoming call mode of the VisuaLink 
receiving a call is set to the manual incoming call setting) is shown in the following.
Note 1:
  Detailed sequence in a network is omitted in this description. 
Note 2: 
 Parameters of each command is omitted in this description.
ConsoleVisuaLinkISDN
VisuaLink Console
NCRN
Call...

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Chapter 1 VisuaLink 128/384 Engineering Guide
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