
Contents 
1  Introduction  1 
2  Getting Started  2 
2.1  Achieving the Best Performance  2 
3  Overview  3 
3.1  Defining the VS-801USB 8x1 USB Switcher  4 
4  Connecting the VS-801USB  6 
4.1  Connecting to the VS-801USB via RS-232  7 
4.2  Connecting to the VS-801USB via the ETHERNET  7 
5  Operating the VS-801USB  10 
5.1  The Front Panel Buttons  10 
5.2  The REMOTE Terminal Block Connector  10 
5.3  The Application Software  10 
6  Firmware Upgrade  11 
7  Technical Specifications  12 
8  Default Communication Parameters  13 
9  Kramer Protocol 2000  14 
10  Protocol 3000  16 
10.1  Kramer Protocol 3000 Syntax  16 
10.2  Kramer Protocol 3000 Commands  19 
Figures 
Figure 1: VS-801USB 8x1 USB Switcher  4 
Figure 2: Connecting to the VS-801USB  7 
Figure 3: Local Area Connection Properties Window  8 
Figure 4: Internet Protocol (TCP/IP) Properties Window  9 
Figure 5: Connecting the Contact Closure Remote Control PINs  10 
VS-801USB –  Contents  i 

1  Introduction 
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been 
providing a world of unique, creative, and affordable solutions to the vast range of 
problems that confront video, audio, presentation, and broadcasting professionals 
on a daily basis. In recent years, we have redesigned and upgraded most of our 
line, making the best even better! 
Our 1,000-plus different models now appear in 11 groups that are clearly defined 
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers; 
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 
5: Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP 
7: Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9: 
Room Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11: 
Sierra Video Products. 
Congratulations on purchasing your Kramer VS-801USB 8x1 USB Switcher, 
which is ideal for educational institutions, presentation and display systems and 
home theater applications. 
VS-801USB - Introduction  1 

2  Getting Started 
We recommend that you: 
• Unpack the equipment carefully and save the original box and packaging 
materials for possible future shipment 
• Review the contents of this user manual 
 Use Kramer high performance high resolution cables 
Go to http://www.kramerelectronics.com to check for up-to-date  
user manuals, application programs, and to check if firmware 
upgrades are available (where appropriate). 
2.1  Achieving the Best Performance 
To achieve the best performance: 
• Use only good quality connection cables to avoid interference, deterioration 
in signal quality due to poor matching, and elevated noise levels (often 
associated with low quality cables) 
• Avoid interference from neighboring electrical appliances that may adversely 
influence signal quality 
• Do not secure the cables in tight bundles or roll the slack into tight coils 
• Position your Kramer VS-801USB away from moisture, excessive sunlight 
and dust 
Caution:  No operator serviceable parts inside the unit 
Warning: 
Warning: 
Use only the Kramer Electronics input power wall 
adapter that is provided with the unit 
Disconnect the power and unplug the unit from the 
wall before installing 
2  VS-801USB - Getting Started