ViewSonic SC-T25 VTOS User manual

SC-T25 (VTOS)
Thin Client
User Guide
Model No. VS16585

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Thank you for choosing ViewSonic
With over 25 years as a world leading provider of visual solutions, ViewSonic
is dedicated to exceeding the world’s expectations for technological
evolution, innovation, and simplicity. At ViewSonic, we believe that our
products have the potential to make a positive impact in the world, and
we are confident that the ViewSonic product you have chosen will serve
you well.
Once again, thank you for choosing ViewSonic !

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Compliance Information
FCC Statement
This device complies with part 15 of FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency
energy, and if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Warning: You are cautioned that changes or modications not expressly approved
by the party responsible for compliance could void your authority to operate the
equipment.
For Canada
CAN ICES-3 (B)/NMB-3(B)
CE Conformity for European Countries
The device complies with the EMC Directive 2014/30/EU and Low Voltage
Directive 2014/35/EU.
Following information is only for EU-member states:
The mark is in compliance with the Waste Electrical and Electronic
Equipment Directive 2012/19/EU (WEEE).
The mark indicates the requirement NOT to dispose the equipment including
any spent or discarded batteries or accumulators as unsorted municipal
waste, but use the return and collection systems available.

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Important Safety Instructions
1. Read these instructions completely before using the equipment.
2. Keep these instructions in a safe place.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this equipment near water. Warning: To reduce the risk of re or
electric shock, do not expose this apparatus to rain or moisture.
6. Do not block any ventilation openings. Install the equipment in accordance with
the manufacturer’s instructions.
7. Do not install near any heat sources such as radiators, heat registers, stoves, or
other devices (including ampliers) that produce heat.
8. Do not attempt to circumvent the safety provisions of the polarized or grounding-
type plug. A polarized plug has two blades with one wider than the other. A
grounding type plug has two blades and a third grounding prong. The wide blade
and the third prong are provided for your safety. If the plug does not t into your
outlet, consult an electrician for replacement of the outlet.
9. Protect the power cord from being tread upon or pinched, particularly at the plug,
and the point where if emerges from the equipment. Be sure that the power
outlet is located near the equipment so that it is easily accessible.
10. Only use attachments/accessories specied by the manufacturer.
11. Use only with the cart, stand, tripod, bracket, or table specied by the
manufacturer, or sold with the equipment. When a cart is used, use
caution when moving the cart/equipment combination to avoid injury from tipping
over.
12. Unplug this equipment when it will be unused for long periods of time.
13. Refer all servicing to qualied service personnel. Service is required when the
unit has been damaged in any way, such as: if the power-supply cord or plug is
damaged, if liquid is spilled onto or objects fall into the unit, if the unit is exposed
to rain or moisture, or if the unit does not operate normally or has been dropped.
14. Do not remove equipment covers and access any of the components inside the
equipment. Any access inside the equipment without an authorized or certied
technician may cause serious injuries and damage. For any problem, contact
your dealer for assistance.
15. Don’t use a keyboard and mouse that in total require more than 200 mA of rated
current during operation.
16. Use only power supplies listed in the user instructions.

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Declaration of RoHS2 Compliance
This product has been designed and manufactured in compliance with Directive
2011/65/EU of the European Parliament and the Council on restriction of the use
of certain hazardous substances in electrical and electronic equipment (RoHS2
Directive) and is deemed to comply with the maximum concentration values issued
by the European Technical Adaptation Committee (TAC) as shown below:
Substance Proposed Maximum
Concentration Actual Concentration
Lead (Pb) 0.1% < 0.1%
Mercury (Hg) 0.1% < 0.1%
Cadmium (Cd) 0.01% < 0.01%
Hexavalent Chromium (Cr6+) 0.1% < 0.1%
Polybrominated biphenyls (PBB) 0.1% < 0.1%
Polybrominated diphenyl ethers
(PBDE) 0.1% < 0.1%
Certain components of products as stated above are exempted under the Annex III
of the RoHS2 Directives as noted below:
Examples of exempted components are:
1. Mercury in cold cathode uorescent lamps and external electrode uorescent
lamps (CCFL and EEFL) for special purposes not exceeding (per lamp):
(1) Short length (≦500 mm): maximum 3.5 mg per lamp.
(2) Medium length (＞500 mm and ≦1,500 mm): maximum 5 mg per lamp.
(3) Long length (＞1,500 mm): maximum 13 mg per lamp.
2. Lead in glass of cathode ray tubes.
3. Lead in glass of uorescent tubes not exceeding 0.2% by weight.
4. Lead as an alloying element in aluminium containing up to 0.4% lead by weight.
5. Copper alloy containing up to 4% lead by weight.
6. Lead in high melting temperature type solders (i.e. lead-based alloys containing
85% by weight or more lead).
7. Electrical and electronic components containing lead in a glass or ceramic other
than dielectric ceramic in capacitors, e.g. piezoelectronic devices, or in a glass or
ceramic matrix compound.

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Copyright Information
Copyright ©ViewSonic Corporation, 2016. All rights reserved.
ViewSonic, the three birds logo, and MultiClient are either registered trademarks or
trademarks of ViewSonic Corporation.
Microsoft®, Windows®, and MultiPoint™ are trademarks of the Microsoft group of
companies.
Product Registration
To meet your future needs, and to receive any additional product information as it
becomes available, please register your product on the Internet at: www.viewsonic.
com.
For Your Records
Product Name:
Model Number:
Document Number:
Serial Number:
Purchase Date:
SC-T25
ViewSonic Thin Client
VS16585
SC-T25_UG_ENG Rev. 1A 09-06-16
_______________________________
_______________________________
Product disposal at end of product life
ViewSonic respects the environment and is committed to working and living green.
Thank you for being part of Smarter, Greener Computing. Please visit ViewSonic
website to learn more.
USA & Canada: http://www.viewsonic.com/company/green/recycle-program/
Europe: http://www.viewsoniceurope.com/uk/support/recycling-information/
Taiwan: http://recycle.epa.gov.tw/recycle/index2.aspx

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Contents
Connection Instructions: ...............................................................................1
1. Introduction..............................................................................................2
2. VTOS management .............................................................................2
3. VTOS boot up & quick start tips below......................................2
4. Local Keyboard Short Cuts..............................................................3
5. HDX mode, first step convert your SSL Certificate! ............3
6. Audio tips for the SC-T25 and Citrix HDX.................................3
7. Local Configuration .............................................................................4
8. Configure: Device .................................................................................5
9. Configure: Displays .............................................................................5
10. Configure: Servers ...............................................................................8
11. Configure: Network..............................................................................9
12. Configure: Access protocol...........................................................10
13. Configure: Misc....................................................................................18
14. Configure: About.................................................................................20
15. FAQ ............................................................................................................21
Specifications....................................................................................................27
Other Information.............................................................................................28

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Connection Instructions:
Step 1: Connect to Network with Ethernet Cable to Ethernet Jack (Cable not
supplied)
Step 2: Connect Keyboard & Mouse into USB port (Not supplied)
Step 3: Connect to monitor via HDMI to HDMI socket (Cable not supplied)
Step 4: Plug-in power to micro-USB, use Power Adapter supplied.
*At boot up, follow the on screen instructions to congure your device.
SC-T25
Quick Start Guide
United States
http://www.viewsonic.com
Phone: [phone] (Toll-Free)
1-424-233-2530 (Toll)
Canada
http://www.viewsonic.com
Phone: [phone] (Toll-Free)
1-424-233-2533 (Toll)
Puerto Rico & Virgin Islands
http://www.viewsonic.com
Phone: [phone] (English)
http://www.viewsonic.com/la/
soporte/servicio-tecnico
(Español)
Europe
http://www.viewsoniceurope.com/
uk/support/call-desk/
中国
http://www.viewsonic.com.cn
电话：4008 988 188
香港
http://www.hk.viewsonic.com
電話：852 3102 2900
澳門
http://www.hk.viewsonic.com
電話：853 2870 0303
台灣
http://www.viewsonic.com.tw
電話：[phone]
Korea
http://ap.viewsonic.com/kr/
Phone: [phone]
Singapore/Malaysia/Thailand
http://www.viewsonic.com.sg
Phone: [phone]
India
http://www.in.viewsonic.com
Phone: [phone]
Australia/New Zealand
http://www.viewsonic.com.au
Phone: [phone] (AUS)
0800 008 822 (NZ)
South Africa
http://ap.viewsonic.com/za/
Latin America (Chile)
http://www.viewsonic.com/la/
Phone: http://www.viewsonic.com/la/
soporte/servicio-tecnico
Latin America (Mexico)
http://www.viewsonic.com/la/
Phone: [phone]
55) 6547-6484
Latin America (Peru)
http://www.viewsonic.com/la/
Phone: http://www.viewsonic.com/la/
soporte/servicio-tecnico
Latin America (Argentina)
http://www.viewsonic.com/la/
Phone: http://www.viewsonic.com/la/
soporte/servicio-tecnico
Download User Guide and ViewSonic Device Manager software from the Support & Downloads section at
http://www.viewsonic.com/us/sc-t25.html
SC-T25_QSG_Rev. 1a 05-17-16
Copyright © 2016 ViewSonic Corporation. All rights reserved.
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4 USB Ports
* Need some type of 3.5mm to
Composite cable which is not included
Plug-in power to micro-USB, use Power Adapter supplied
*Audio cable or headphones not included
Your SC-T25 is equipped with the LED to indicate the state of power and internal
storage.
The meanings of LED signals are described: LED Off(The client is off) / Red(The
client is on) / Activity Green( Internal Storage Activity)

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1. Introduction
VTOS has been optimized to deliver maximum Thin Client performance on the
SC-T25, SC-T36 & VS RePC Devices by using Assembly Language routines and
making full use of the integrated H.264 Hardware decoder.
2. VTOS management
VTOS is managed with the ViewSonic Device Manager 3.0 (VDM3.0) which may be
used for a variety of tasks, ranging from something as simple as rebooting a VTOS
Device, to upgrading the Device with the latest VTOS software. VDM3.0 runs on
Windows and Linux.
A Linux version of VDM3.0 is integrated into VTOS, this can be enabled by changing
the VTOS Protocol to VDM3.0.
3. VTOS boot up & quick start tips below
VTOS has the same look and feel regardless of the Device that it is running on,
Devices may be congured to auto connect to a Remote Desktop and or auto login
or boot to the local Desktop. Conguration may be carried out using VDM3.0 or the
local Conguration menu which is selected by clicking on the Congure Tab.

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4. Local Keyboard Short Cuts
• ctrl + alt + c — launches VSconfig
• ctrl + alt + t — launches a terminal console
• ctrl + alt + d — switches desktop workspace
• ctrl + alt + s — enables shadowing mode using VNC
• ctrl + alt + v — launches the ALSA mixer for sound country
• ctrl + alt + r — invoked twice in 2 seconds to reset image to factory default
• alt + F4 — kill the session and back to normal start up screen
5. HDX mode, first step convert your SSL
Certificate!
VTOS HDX mode requires a SSL connection, you must upload your Root SSL
Certicate to the VTOS Device using the VDM3.0, Upload Icon, SSL Certicate. See
page 10 & Page 11 below for more details.
Tip: Before uploading your SSL Certicate you must convert the Root Certicate
from a .cer le to a .pem le then rename it to remove the spaces in the certicate.
Tip: In HDX mode you must enter your Storefront name NOT your email address.
6. Audio tips for the SC-T25 and Citrix HDX
Please ensure that you plug in your USB audio Devices before starting the SC-T25
(or reboot after plugging in Devices). The SC-T25 will redirect audio in this order:
USB, HDMI, analogue. If you encounter problems, try this:
a. while not logged into your virtual desktop, type ctrl+alt+t on the SC-T25 to
open xterm
b. type “amixer cset numid=3 2” in the xterm window. This sets the audio Device
by the last number in your config line. Using 2 forces audio to HDMI. 1 forces
analogue audio, and while 0 is automatic.

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7. Local Configuration
Click on the Congure Tab to open the VScong dialog box which is shown below,
you will notice Seven Tabs; Device, Displays, Servers, Network, Access Protocol,
Misc and About. The Administrator is able to set a VScong password using VDM3.0
to lock out any local conguration changes by disabling access to VScong without
the correct Password.

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8. Configure: Device
The Device information is displayed, this is not editable
Firmware Type this is either VS RPi which is the SC-T25 Firmware, VS RKC which
is the SC-T36 Firmware or VS RePC which is the generic 32-bit X86 release for the
Re-Purpose PC & Laptop Market.
Serial number is the Hardware Serial number
Firmware version is displayed in the form of “Kernel Version–Firmware version”.
In this example “4.4.7-4.2.5” designates Linux Kernel version 4.4.7 and Firmware
release 4.2.5
MAC address of the active Network interface
IP address of the Device
Reset to factory defaults will erase any conguration changes and reset VTOS to
the installation factory default.
9. Configure: Displays
The Displays Tab is shown below, in this example a Single display has been
congured, the default is to auto detect and auto congure the display which
normally results in a display congured for the native resolution of the attached
monitor. The connector Output type can be left set at the default Auto or manually
selected from the Drop down list which appears when you click on the down arrow
next to Output Connector. The choices are Auto, HDMI, VGA, DisplayPort, DVI,
Splitter Cable, Built-in Panel or None. The choices on the Single Display
SC-T25 are either Auto or HDMI. If your SC-T25 Monitor only supports DVI, use a
HDMI to DVI cable to connect the Monitor.
The Video mode default is Clone which results in a Mirror Image on the second and
or third displays.
The SC-T25 valid resolutions are shown below, choose a matching resolution from
the drop down Resolution box. (Check that your Monitor actually supports the
resolution that you require).
800 x 600, 1024 x 768, 1280 x 720, 1280 x 960, 1280 x 1024, 1366 x 768,
1440 x 900, 1600 x 1200, 1680 x 1050, 1920 x 1080, 1920 x 1200, 1920 x 1080 is
also known as 1080p this is the default resolution on most Monitors

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In the example shown below Dual Displays have been congured, the Video mode is
set to Extend Desktop, Output 1 is set to HDMI and Output 2 is set to VGA, Output
3 is set to None as any unused or non-existent Displays must be set to None. The
Output 2 Display Position has been set to the right of the Output 1 Display. The
choices are Right of, Left of, Above, Below or None. The Referent value can be any
of the other two Outputs, this choice will not appear until you set the Position. The
Position option for Output 2 & 3 will not appear until Extend Desktop is selected. The
Orientation is either the default Landscape or Portrait, the resolution can be selected
from the drop down Resolution Tab. When conguring multiple Monitors the Identify
Monitors Tab can be a useful tool, especially when conguring three Monitors.

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After making any changes click on Save settings, you must also do this before
pressing the Identify Monitors Tab
After changing the resolution a reboot of the VTOS device(s) is required.

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10. Configure: Servers
a. Enable VDM3.0 Server, this is used to point the VTOS Device at the PC or
Virtual Appliance running VDM3.0. Tick this check box and enter the Name or
IP Address and Port number of the VDM3.0 system. If you change the default
5808 Port number here you must also change the port number on VDM3.0
under Edit Settings.
b. Time Server, Set the Timezone and Time Server.
c. Enable PXE Server, this is used for PXE boot installations of VTOS RePC on
many PC’s simultaneously. Please see the VDM3.0 User Manual for more
details.

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11. Configure: Network
The Network Tab is used to congure the Wired and or Wireless interfaces. The
default VTOS setting is Wired DHCP, in some cases the DHCP server does not
provide the DNS information. In this case you should set DHCP with DNS Override
from the drop down box, then manually enter the DNS information in DNS 1 and or
DNS 2. A Static IP and DNS can also be entered.
If you are using Wireless, uncheck Wired, check Wireless and enter your SSID and
Password, we only support WPA/WPA2 Protocol as this is the most secure Wireless
Protocol
On some devices you may need to reboot to ensure the WiFi mode is working.

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12. Configure: Access protocol
The Access protocol Tab is used to select a Protocol for the Remote Desktop
connection and is also used to select other modes such as Digital Signage.
Depending on the Protocol selected in the Connect using dialog box, the other
selections below will change to the defaults for the selected Protocol or will be
grayed out. In most situations you should accept the defaults.

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Web Mode; In the image above the Chrome Web Browser has been congured in
Kiosk mode to connect to a Citrix Storefront Server via Citrix Receiver, the Storefront
address is dened in the Command line arguments box.
The image below shows a Citrix Storefront connection via the Web Browser running
in Full Screen Kiosk mode.
A Web Browser connection to a Citrix Storefront supports both http and https
connections whereas Citrix HDX native mode only allows for an https connection
which requires the upload of a SSL Certicate via the VDM3.0 Upload Icon.
After logging out of the Citrix HDX session you can Log on again by pressing the
Log On button. If you wish to close the Web Browser press Alt-F4, then New
session to restart it.

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HDX Mode; this mode will launch the Citrix Receiver using the native client, see
the Dialog box below. Do not enter your email address as VTOS does not support
this option yet. You must enter your Storefront Server address, only secure SSL
Encrypted sessions are supported by the Linux Citrix Receiver in this mode.

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For the SSL connection to succeed you must copy your Root SSL Certicate in .pem
format to the VTOS Device. Select the check box next to your Device name(s) on
VDM3.0 then click on the Upload Icon (Tools / Install / Install le on device / Install
SSL Certicate), ensure the SSL Certicate is selected in the check box. Use the
Browse button to choose your SSL Certicate and press OK, this will upload your
SSL Certicate to any selected VTOS Devices. Reboot all selected Devices to
permanently save the SSL Certicates to the selected Devices. Tip: Before uploading
your SSL Certicate you must convert the root certicate from a .cer le to a .pem
le then rename it to remove the spaces in the certicate.