ADDERLink INFINITY dual 2112T Manual v30 2112T

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Unit configuration
This page provides access to a selection of both basic and advanced settings for the ALIF 
2112T. Many of the settings displayed here are also accessible through the on-screen 
menu.
Unit Name
The name entered here will be displayed on the local menus and the remote VNC 
viewer/browser windows.
New Connections Private
Allows you to determine whether new local or VNC connections should be set up as 
private (when ticked) or as shared (when unticked).
Menu Bar Toggle Hot Key
Determines the function key that can be used to display/hide the menu bar within the 
VNC screen.
Encryption
Four options are available: Always On, Prefer Off, Prefer On, or Maximum. The one 
to choose depends on the specific details of your installation. The use of encryption 
imposes a slight performance overhead of roughly 10% but is highly secure against third 
party intrusion. Maximum selects 256 bit encryption. 
Number of simultaneous VNC Users
Allows you to restrict the number of concurrent VNC sessions. The maximum number is 
16 and the default is 4.
VNC Viewer Hot Key Sequence
When using the VNC Viewer, you can use key press combinations to select host 
computers and also to display the host selection menu. This option allows you to choose 
which keys should be used to form the hotkeys that will precede a switching command. 
The default setting is CTRL + ALT, so as an example when you press the CTRL  ALT and 
2 keys, the viewer will change to the host with “Hotkey Host Number” 2 - see Host 
configuration. 
Advanced Unit Configuration
Hardware Version
Indicates the version of the electronic circuitry within the ALIF 2112T unit.
Firmware Version
Indicates the version of the internal software within the ALIF 2112T flash memory. This 
may be updated using the flash upgrade procedure. 
Host Keyboard Layout
Use the arrow buttons to match the keyboard layout expected by the host system.
Admin (Change) Password
Click this button to enter/edit the password that will be used to gain administrator 
access to the ALIF 2112T.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Unit Configuration’ option.   
						

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Advanced unit configuration
Click this button to display advanced options that do not normally require alteration.Background Refresh Rate
Use the arrow keys to alter the background refresh rate used to correct any screen 
changes missed in normal operation. The options are: Slow, Medium, Fast, Auto or 
Disabled. The Auto option automatically varies the refresh rate when multiple VNC 
sessions are active to provide a balance between the sessions. 
Note: When a low connection speed is detected, the background refresh is automatically 
disabled, regardless of the settings of this option.
Mouse  Latency Allowance
This option is used during calibration to account for latency delays that may be caused as 
signals pass through a device. 
During calibration, the ALIF 2112T waits for 40ms after each mouse movement before 
sampling the next. If a device adds a significant delay to the flow of data, the calibration 
process can be lengthened or may fail entirely. The value entered here is added to (or 
subtracted from) the default 40ms sampling time.
Note: You can enter negative values (down to -40) in order to speed up\
 the 
calibration process when using fast KVM switches. Use this option with c\
aution as it 
can adversely affect the calibration process.
Mouse Rate
Defines the rate at which mouse movement data are transmitted to the system. The default 
option is 20ms, which equates to 50 mouse events per second. This is used to slow down the 
rate in exceptional circumstances but normally requires no adjustment.
Single Mouse Mode Mouse Switch
Select the mouse button combination to exit from single mouse mode (when active). 
Use Quick Mouse Calibration
Invokes colord calibration techniques that handle the majority of mouse types. 
Behaviour for admin connections when limit reached
Determines what should occur when the limit on VNC users is reached. Options are: 
Replace oldest connection, Replace newest connection and Don’t replace. Only non-administrator 
connections can be terminated in this way.
Enable Virtual Media
When ticked, allows the Adder Virtual Media features to be used. 
Reset Unit
Performs a complete cold boot of the ALIF 2112T unit. 
Force VNC Protocol 3.3
IMPORTANT: Protocol 3.3 is a legacy version that does not offer any encryption. Hashed 
passwords are not supported with 3.3
Idle Timeout
Determines the period of inactivity on a global connection before the user is logged out. The 
idle timeout period can be set to any time span, expressed in minutes.
Session Sleep Timeout
Determines the period of inactivity before the viewer screen will blank and a message 
is displayed. When no hosts are being viewed either because of this time out or if no 
viewers are active then parts of the video circuitry are powered down reducing power 
consumption by up to a third.
Protocol Timeout
Sets the time period by which responses should have been received to outgoing data 
packets. If the stated period is exceeded, then a connection is considered lost and 
terminated.   
						

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Time & date configuration
This page allows you to configure all aspects relating to time and date within the unit.Timezone specifier
Optionally enter a recognized timezone specifier related to the current position of the 
ALIF 2112T unit. When an NTP server is used, the specifier will be used to provide the 
correct real time.
The timezone specifier takes the following form: 
     std offset dst [offset],start[/time],end[/time]
The std and offset specify the standard time zone, such as GMT and 0, or CET and -1, 
or EST and 5, respectively. 
The dst string and [offset] specify the name and offset for the corresponding Daylight 
Saving Time zone; if the offset is omitted, it defaults to one hour ahead of standard time. 
The remainder of the specification describes when Daylight Saving Time is in effect. The 
start field is when Daylight Saving Time goes into effect and the end field is when the 
change is made back to standard time. The most common format used for the daylight 
saving time is: Mm.w.d 
Where: m specifies the month and must be between 1 and 12. The  day d must be 
between 0 (Sunday) and 6. The  week w must be between 1 and 5; week 1 is the first 
week in which day d occurs, and week 5 specifies the last d day in the month. 
The time fields specify when, in the local time currently in effect, the change to the other 
time occurs. If omitted, the default is 02:00:00. 
Typical examples are:
UK:        GMT0BST,M3.5.0/1,M10.5.0/2
Central Europe:     CET-1CEST,M3.5.0/2,M10.5.0/3
US Eastern:      EST5EDT,M3.2.0/2,M11.1.0/2
US Pacific:      PST5PDT,M3.2.0/2,M11.1.0/2
For further details
• For details of timezone specifier formats, please refer to: 
http://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
• For details of the Network Time Protocol (main RFC number: 1305; the SNTP subset 
used as the basis for the ALIF 2112T: 4330) 
http://www.ietf.org/rfc.html  
Use NTP
When this option is selected, the ALIF 2112T will synchronize its internal clocks using 
information from the (Network Time Protocol) server listed in the NTP Server IP address 
field. 
NTP Server IP address
Optionally enter the IP address for a known Network Time Protocol server.  
Set Time from NTP Server
Click to immediately use the time and date information from the listed NTP server. 
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Time & Date Configuration’ option.   
						

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Network configuration
This page allows you to configure the various aspects of the IP port.
MAC address
Media Access Control address – this is the unique and unchangeable code that was 
hard coded within your ALIF 2112T unit when it was built. It consists of six 2-digit 
hexadecimal (base 16) numbers separated by colons. A section of the MAC address 
identifies the manufacturer, while the remainder is effectively the unique electronic serial 
number of your particular unit.  
IP Address
This is the identity of the ALIF 2112T within a network. The IP address can be thought of 
as the telephone number of the ALIF 2112T. Unlike the MAC address, the IP address can 
be altered to suit the network to which it is connected. It can either be entered manually 
or configured automatically using the DHCP option. When the DHCP option is enabled, 
this entry is grayed out.
IP Network Mask
Also often called the subnet-mask, this value is used alongside the IP address to help 
define a smaller collection (or subnet) of devices on a network. In this way a distinction 
is made between locally connected devices and ones that are reachable elsewhere, such 
as on the wider Internet. This process helps to reduce overall traffic on the network and 
hence speed up connections in general.
IP Gateway
This is the address of the device that links the local network (to which the ALIF 2112T 
is connected) to another network such as the wider Internet. Usually the actual gateway 
is a network router and it will be used whenever a required address lies outside the 
current network.  
VNC Port
This is the logical link through which communications with a remote VNC viewer will be 
channelled. The default setting is 5900 which is a widely recognized port number for use 
by VNC software. However, in certain circumstances it may be advantageous to alter this 
number - see ‘Security issues with ports’ for more details.  
HTTP Port
This is the logical link through which communications with a remote web browser 
will be channelled. The default setting of 80 is an established standard for web (HTTP 
– HyperText Transfer Protocol) traffic though this can be changed to suit your local 
network requirements.
IP Access Control
This section allows you to optionally specify ranges of addresses which will or won’t 
be granted access to the ALIF 2112T. If this option is left unchanged, then the default 
entry of ‘+0.0.0.0/0.0.0.0’ ensures that access from all IP addresses will be permitted. See 
Setting IP access control for details. 
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Network Configuration’ option.   
						

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Setting IP access control
The golden rule with this feature is ‘Include before you exclude’ or to put it another way 
‘Arrange allowed addresses in the list before the denied addresses’. 
This is because the positions of entries in the list are vitally important. Once a range of 
addresses is denied access, it is not possible to make exceptions for particular addresses 
within that range. For instance, if the range of addresses from A to F are denied access 
first, then the address C could not be granted access lower down the list. Address C 
needs to be placed in the list before the denied range.
IMPORTANT: This feature should be configured with extreme caution as it is possible to deny 
access to everyone. If such an error occurs, you will need to perform a reset to factory default 
settings in order to regain access. 
To define a new IP access control entry
1 Click the Add button to display a popup dialog:
2 Enter the base network address, the mask and select the appropriate access setting.
3 Click the OK button.
To reorder access control entries
IMPORTANT: When reordering, ensure that any specific allowed addresses are listed higher in 
the list than any denied addresses. Take care not to invoke any deny access settings that would 
exclude valid users.
1 In the access control list, click on the entry to be moved.
2 Click the Up or Down buttons as appropriate.
To edit/remove access control entries
1 In the access control list, click on the appropriate entry.
2 Click either the Edit or Remove button as appropriate.
Network/AddressEnter the network address that is to be allowed or denied access. If a range of addresses is being specified then specify any one of the addresses within the range and use the Mask entry to indicate the size of the range.
MaskEnter an IP network mask that indicates the range of addresses that are to be allowed or denied access. For instance, if only a single specified IP address were to be required, the mask entry would be 255.255.255.255 in order to specify a single location.
AccessUse the arrow buttons to select either ‘Allow’ or ‘Deny’ as appropriate.
In the list, access control addresses prefixed by ‘+’ are allow entries while those prefixed 
by ‘– ‘ are deny entries.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Network Configuration’ option.   
						

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Serial port configuration
This page allows you to configure the baud rate of the ALIF 2112T serial port that is 
used to control power switch devices. A full range of standard baud rates are available.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Serial port Configuration’ option.
Baud Rate
Determines the communication speed of the OPTIONS port. The other communication 
settings are fixed as: No parity, 8 bit word, 1 stop bit.   
						

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Host configuration
This page provides the opportunity to configure various details for each of the host 
systems that may be connected to the ALIF 2112T. Each entry can be configured with 
a name, the permitted users, the hot key combinations required to switch to it and, if 
required, appropriate power control commands.
To create a new host entry
1 Click one of the host entries to reveal a Host configuration dialog. 
Name
Enter the name that will be displayed in the viewer window when you click the Host 
button.
Users
Select the users that will be permitted to connect to this host.  Either enter * to allow 
all users or a list of users separated by commas.
KVM Switch Macro
Declare the hot key sequence that will cause the KVM switch to link with the required 
host system. See Appendix L - Hotkey sequences for details.
Hotkey Host Number 
Declare the numeric sequence that is pressed together with the VNC viewer hotkeys 
(usually Ctrl + Alt) to select this host system, which is the same value as the KVM port 
number. 
Power On
Enter the code required to make an attached power control unit apply power to the 
host. See Power switching configuration for details.
Power Off
Enter the code required to make an attached power control unit remove power from 
the selected host. 
Reboot
Enter the code required to make an attached power control unit remove power and 
then re-apply it a few seconds later. 
2 Enter the required information in each field.
3 Click the OK button.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Host Configuration’ option.
Sort
 Allows you to reorder the list of hosts either alphabetically or by entry number. 
Erase Host Configuration
 Removes all hosts from the list.    
						

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Power switching configuration
Power switch configuration comprises two main steps:
• Configure the OPTIONS serial port to the same speed as used by the power switch 
box(es), using the Serial port configuration menu. 
• Configure power ON and OFF strings for each relevant host computer.
For each power port there needs to be a valid ‘Power ON string’ and similarly an 
appropriate ‘Power OFF string’. In each case, the strings are a short sequence of 
characters that combine a port address and a power on or off value. 
If a particular computer has more than one power input (and thus requires an equivalent 
number of power ports to control them), collections of strings can be combined to 
switch all of the required ports together as a group.
To configure the power sequences for each host computer
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Host configuration’ option.
4 Click a host entry to display a Host configuration dialog:
5 If necessary, configure other parameters (Name, Users, Hot Keys - MORE).
Power control sequences
Notes: The settings given below are for Adder power switches model numbers PSU-8SLAVE and 
PSU-1GUARD - other power switches may require different settings. Please refer to your power 
switch documentation for details about codes required by other power switches. 
The structure of each power sequence (OFF, ON or Reboot) is as follows:
/Pxy=z\0D 
 Where: 
x is the switch box number,
y is the power port number,  
z is ‘0’ for OFF or ‘1’ for ON
r is for Reboot, and
\0D represents Enter (or Carriage return).
Example 1 
To switch ON port 5 of switch box 2, the code would be as follows:
• Power sequence:   P25=1\0D
Example 2 
To switch OFF port 8 of switch box 3, the code would be as follows:
• Power sequence:   P38=0\0D
For details about operating this feature, see Power switching control within the 
Configuration chapter.
To control two or more ports simultaneously
You can control up to four power ports using a single sequence. This is done using 
the same command structure as shown above, plus a delay command, for each port. 
Immediately following a port command, insert the characters ‘\*’ before the next port 
command, and so on up to four ports. For instance, to switch on ports 1 and 2 in the 
first power switch, the command line would be:
  P11=1\0D\*P12=1\0D
6 Enter the Power control sequences in the Power On, Power Off and Reboot fields 
7  Click OK to close the dialog and then click the Save button in the main Host 
Configuration window to store the details.   
						

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Logging and status
This screen provides various details about the user activity on the ALIF 2112T unit. 
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Logging and Status’ option.
To copy and paste the log
You can copy the information listed within the log and paste it into another application.
1 While viewing the log screen, press Ctrl and C, to copy the data into the clipboard.
2 In a text application (i.e. Word, WordPad, Notepad) press Ctrl and V, or right mouse 
click and ‘Paste’.
Date and time the event occurred
Type of event, user name and access method or remote IP address
Click to clear all log entriesClick to refresh the list
Click to return to the main menu
Optionally enter an IP address to which the status log should be sent
Syslog Server IP Address 
Logging information can optionally be sent, as it occurs, to a separate system using the 
standard Syslog protocol. Enter the IP address of a suitable system in the field provided.
For further details
• For details of the Syslog protocol (RFC number: 3164) 
http://www.ietf.org/rfc.html   
						

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APPENDIX G - VNC viewer connection options
Note: If you are using a later version of VNC viewer than that provided with the product 
originally, some menus may differ slightly from those shown here.
When you are connecting to the ALIF 
2112T using the VNC viewer, a number of 
options are available. 
Note: If you make any changes to the options given here and wish to retain them for successive 
connection sessions, ensure that the option ‘Use these settings for all new connections’ is ticked. 
Click here to access the options
There are four tabbed pages of options:
• Display
• Inputs
• Connection
• Expert
You can also reduce the four standard tabs to just one that contains only the most 
commonly used options by clicking the Basic... button in the lower left corner. The 
resulting page includes all of the Display items shown opposite plus the Connection 
options shown below:
Connection
View-only
When ticked, no control data (from keyboard or mouse) are sent to the ALIF 2112T.
Pass special keys directly to server
When ticked, ‘special’ keys (the Windows key, the Print Screen key, Alt+Tab, Alt+Escape 
and Ctrl+Escape) are passed directly to the ALIF 2112T rather than being interpreted 
locally. 
Menu key
This feature allows you to select which function key is used to display the VNC viewer 
options menu. The menu key is the only way to exit from the full screen viewer mode.
Display
Scaling
No Scaling
No attempt is made to make the screen 
image fit the viewer window. You may need 
to scroll horizontally and/or vertically to 
view all parts of the screen image.
Scale to Window Size
Adjusts the server screen image to suit the 
size of the viewer window.
Custom Size
Adjusts the server screen image according 
to the Width and Height settings in the 
adjacent fields. A drop box to the right of 
the fields allows you to define the image 
size by percentage or by pixels, as required.
Preserve Aspect Ratio
When ticked, maintains a consistent 
ratio between the horizontal and vertical 
dimensions of the screen image.
Other options
Full screen mode
When ticked, opens the VNC Viewer in full screen mode. 
Enable toolbar
When ticked, the VNC toolbar will be displayed whenever you hover your mouse near 
the top centre of the VNC window. 
Adapt to network speed
When ticked, VNC will automatically adjust the image quality to suit the connection 
speed. When unticked, a slider allows you to choose the balance manually. 
Always use best available colour quality (not in V5 viewers)
When ticked, the VNC Viewer will aim to maximize performance while still maintaining 
a full color display (even on slower network connections) by affecting other aspects of 
operation. For instance, by reducing the amount of information sent about the mouse 
cursor position (which may make the mouse cursor movements appear jerky).