EMC and COMSEC problems on ISDN subscriber lines

Author

Daneffel, H.R.

Author_Institution

Zellweger Telecommun. AG, Hombrechtikon, Switzerland

fYear

1988

fDate

11-16 Sep 1988

Firstpage

57

Lastpage

61

Abstract

ISDN signals conforming to CCITT recommendations can give rise to electromagnetic compatibility (EMC) problems if they are transmitted via unshielded lines. Investigations concentrating on common-mode interference signals as well as the construction of ISDN equipment that can cope with EMC are described. The issue of communication security (COMSEC) is examined, since these signals could be received by special equipment and the original information recovered. It is also possible to influence an ISDN transmission by means of external signals. It is shown that, by using shielded cables in the inhouse area and by adequate construction of the equipment, these problems can be virtually eliminated

Keywords

ISDN; electromagnetic compatibility; shielding; standardisation; subscriber loops; CCITT recommendations; COMSEC; EMC; ISDN subscriber lines; common-mode interference signals; communication security; electromagnetic compatibility; inhouse area; shielded cables; unshielded lines; Cables; Current measurement; Electromagnetic compatibility; Frequency; ISDN; Information security; Interference; Manufacturing; Protection; Telecommunications;

fLanguage

English

Publisher

ieee

Conference_Titel

Subscriber Loops and Services, 1988. Proceedings, ISSLS 88., International Symposium on

Conference_Location

Boston, MA

Type

conf

DOI

10.1109/ISSLS.1988.10630

Filename

10630