Digital key telephone system and extension terminal device thereof
作者： Yoshihiro Kawauchi , Hiroshi Mano , Toshiaki Tanaka , Nobuhiro Masaki , Terunori Suwa
DOI:
关键词:
摘要: According to this invention, a digital key telephone system connected an analog public network NW having function of transmitting ringing signal including identification information calling line through subscriber (CO line), accommodating plurality extension lines each (DKT) 2 or standard (STT) 4 as terminal, and switching connecting the other includes called party storage means storing, in advance, representing correlation between terminals terminal. When arrives from communication NW, (caller ID) contained is detected by interface unit (RCIU) 12. A control (RCTU) 16 determines terminal on basis caller ID stored means, so receives call (RDKU) 13 (RSTU) 15.
lens.org 参考文章(52)
Joseph L. Voelker, Electronic patching system for telecommunications devices ,(1997)
Michael Kennedy, James D. Coleman, Method for testing call waiting, caller id functionality of telephone line ,(1997)
Peter Mclaughlin, Warren Schmitt, Anthony Kolodzinski, A caller id activated test device for testing a telephone subscriber loop/access line ,(1999)
Frederick D. Smith, Call identification display system ,(1991)
Takashi Aoki, Arbitrary selecting of a terminal to be called in key telephone systems ,(1991)
Charles R. Wiebe, Key telephone system with enhanced connectivity ,(1991)
Michael Kennedy, Roy L. Soto, Paul H. Katz, Call yourself BERT testing of ISDN line ,(1997)
Deborah L. Pinard, Ronald A. Evans, Organization chart based call information routing ,(1999)
Masahiko Hara, Key telephone apparatus with call distribution function ,(1997)