> Hi everyone, > A question on K.21 testing: I am looking for some > information/advice on the requirement for CE mark and EN60950. How is > this test done and what are the requirements? It is my understanding > that originally the product (modems connected to PSTN) were only > required to shut down when zapped by the high voltage test, in this > case a fuse could be used along with a gas discharge tube. Now the > requirement is that after the surge, the modem must still function as > before. Is this true? any advise on possibly using a combination of > GDT, polyfuse, thyristor? Thanks in advance! > > sd
I'm not familiar with PTT-attachable equipment. However, here are some general comments re CE marking. CE marking implies that marked goods conform to all applicable EU Directives. For most ITE, this means the EMC and Low Voltage Directives. The simplest method is for the manufacturer to test to, and issue Declaration of Conformity to stated harmonized EMC and safety standards. Other methods are testing by "competent bodies" or by technical construction files (TCF). I believe there are additional Directives for PTT attach equipment, but am not familiar with these. George Alspaugh Product Safety Lexmark International
