Headset telephone ht500 manual

Telephone Headsets L Home Telephones & Accessories L Consumer Electronics All Categories Antiques Art Automotive Baby Books & Magazines Business & Industrial Cameras & Photo Cell Phones & Accessories Clothing, Shoes & Accessories Coins & Paper Money Collectibles A= Headset earpiece telephone audio when telephone is off-hook and PTT-IN is inactive. This is the normal setting. It can also be generated by pressing a key that has been programmed on the console to manually switch the TRHI audio between the telephone and radio console.