Cleaning 
To prevent moisture from entering the LinkRunner Duo, clean it with a moist cloth only. Do not use organic solvents, 
acid, or alkali solutions.  
Safety Information 
The following symbols are used on the product and in this document: 
j  NOT FOR CONNECTION TO PUBLIC TELEPHONE SYSTEMS 
W  PLEASE READ MANUAL FOR SAFETY 
)  CANADIAN STANDARDS ASSOCIATION CERTIFIED TO CANADIAN AND US STANDARDS 
 * 
CLASS 1 LASER PRODUCT. DO NOT LOOK INTO LASER 
WWarnings 
To avoid possible electric shock or personal injury, follow these guidelines: 
•  Do not use this product if it is damaged. Before using the product, inspect the case. Look for cracked or 
missing plastic.  
•  Do not operate the product around explosive gas, vapor or dust. 
•  No serviceable parts. Do not try to service. 
•  If this product is used in a manner not specified by the manufacturer, the protection provided by the product 
may be impaired. 
W 
*
 Warning Class 1 Laser Product 
With an optional SFP fiber adapter installed, this product will contain a Class 1 laser. Do not look into the 
laser port because this may cause eye injury. 
WCautions 
Use the proper terminals and cable for all connections.