1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
<html>
<head>
<title>VNC - The ORL internal version</title>
<link REL="stylesheet" HREF="styles.css" TYPE="text/css">
<meta name="GENERATOR" content="Microsoft FrontPage 3.0">
<meta name="keywords" content="VNC, ORL, Virtual Network Computing, thin-client">
<meta name="Microsoft Theme" content="none, default"><meta name="Microsoft Border" content="none, default"></head>
<body bgcolor="#FFFFFF" vlink="#000080">
<!--webbot bot="Include" U-Include="_private/header.html" TAG="BODY" startspan -->
<table border="0" width="100%" cellpadding="2">
<tr>
<td width="130"><p align="center"><img src="images/vnc.gif" alt="VNC logo" align="center" WIDTH="120" HEIGHT="105"></td>
<td width="20" valign="bottom"></td>
<td width="100%"><h1 align="center"><em>Virtual Network Computing</em><br>
<small><em>from ORL</em></small></h1>
</td>
<td width="75"><a href="http://www.orl.co.uk/"><img src="images/newlogosmall2.gif" alt="ORL" align="right" border="0" WIDTH="70" HEIGHT="47"></a></td>
</tr>
</table>
<hr color="#000080">
<!--webbot bot="Include" endspan i-checksum="5938" -->
<div align="left">
<table border="0" width="100%">
<tr>
<td width="20%" valign="top" align="center" bgcolor="#DCD9BE" background="images/sidebarbg.gif"><!--webbot bot="Include" U-Include="_private/sidebar.html" TAG="BODY" startspan -->
<p align="center"><a href="index.html"><img src="images/homebutton.gif" alt="[Home]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="screenshots.html"><img src="images/screenbutton.gif" alt="[screenshots]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="free.html"><img src="images/freebutton.gif" alt="[free?]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="start.html"><img src="images/startbutton.gif" alt="[getting started]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="docs.html"><img src="images/docbutton.gif" alt="[documentation]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="download.htm"><img src="images/downloadbutton.gif" alt="[download]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="intouch.html"><img src="images/intouchbutton.gif" alt="[keep in touch]" border="0" WIDTH="120" HEIGHT="33"></a><br>
<a href="http://www.orl.co.uk/"><img src="images/orlbutton.gif" alt="[ORL]" border="0" WIDTH="120" HEIGHT="33"></a></p>
<!--webbot bot="Include" endspan i-checksum="44984" -->
</td>
<td width="8%" valign="top"><p align="center"><a href="docs.html"><img src="images/backbutton.gif" alt="back to docs" hspace="2" border="0" WIDTH="20" HEIGHT="20"></a></td>
<td width="100%" valign="top"><h2 align="left"><b>VNC - the internal ORL version</b></h2>
<p>Some of the functionality of the distributed VNC system is limited when compared to the
version we use within ORL. This is not because we wish to deprive the rest of the
world of a more sophisticated system, but because we want VNC to be easy to download and
set up, and this extra functionality would make that process more complicated without
offering major gains to most users.</p>
<p>So this information is given partly for interest's sake, and partly to explain some
things you may find in the source code. If there is overwhelming demand for these features
we may make them available, but this is not currently planned.</p>
<h3>CORBA</h3>
<p>Many of our systems are now linked together using CORBA. We didn't find a
commercial implementation of CORBA which met our requirements, and so we wrote our own, <a href="http://www.orl.co.uk/omniORB">omniORB</a>, which we have also made freely available.
The VNC servers have a CORBA interface which allows them to be controlled by remote
systems. In particular, the interface exposes the name, address and other details of
the server, allows control of the client connections, can perform remote shutdown, and
initiate outgoing connections.</p>
<h3>Outgoing connections</h3>
<p>The simplest mode of operation for VNC is when a viewer initiates a connection to the
server, but it can also operate in reverse. Some of our clients can be put into a
'listening' mode where they wait for connections from the server which are initiated and
closed down using the CORBA interface. </p>
<h3><img src="images/badgeshad.gif" alt="Active Badge" align="left" WIDTH="106" HEIGHT="149">External control</h3>
<p>This means that desktops can be displayed and hidden under the control of other
systems. In particular we use information from our <a href="http://www.orl.co.uk/ab.html">Active
Badge</a> system to display a users' desktop on a nearby monitor when they click one of
the buttons on the badge, and with our <a href="http://www.orl.co.uk/bat">Ultrasound
Location System</a> we can make your desktop appear simply by walking up to a display!</p>
<p align="right"><a href="docs.html"><img src="images/backbutton.gif" alt="back to docs" hspace="5" border="0" WIDTH="20" HEIGHT="20"></a><em>go back to <a href="docs.html">documentation</a></em></td>
<td width="5%"></td>
</tr>
<tr>
<td width="128%" valign="top" align="center" colspan="4"><!--webbot bot="Include" U-Include="_private/footer.html" TAG="BODY" startspan -->
<hr color="#000080">
<p align="center"><em><small>Copyright 1998 - The Olivetti & Oracle Research Lab</small></em></p>
<!--webbot bot="Include" endspan i-checksum="3896" -->
</td>
</tr>
</table>
</div>
</body>
</html>
|
