EMC value propositions for telecom products

Telecommunication plays a vital role in the social fabric of mankind encompassing residential, commercial and public utility environment. Harmonious co-existence of IT/telecom products in society is of paramount importance. Telecom equipment shall not malfunction in a hostile electrical environment. For ensuring that, international standard organisations like the ETSI, IEC, CISPR and national standard bodies like ISI, TEC have laid down EMC specifications, guidelines and procedures depending upon the application. This paper elucidates the design considerations from EMC perspective for the optimum performance of telecom products that would meet the EMC requirements of regulatory authorities. A case study of a telecom product, viz, corDECT WLL (wireless local loop) used in access networks for voice telephony and Internet connectivity is taken up for elucidating EMI potential problems encountered and the measures taken to mitigate the same. Emission and susceptibility requirements from standard institutes to meet the regulatory authorities are outlined. In addition, the measures taken to meet the overvoltage and overcurrent specifications as per ITU Recommendations K20 & k.21 are narrated.