fairly simple DTMF decoder to control solenoid door unlocker and connected it to phone (in this case a cell phone). NOTE:CALLERID would save the phonecall as commented on the article
Bakk1 TV Nutzung, Inernet Nutzung, Internetnutzung über PC usw. Daten 2007 - ältere Studie zu Mediennutzung in der
Zukunft Von Maria Gerhards und Walter Klingler*
F. Abel, J. Coi, N. Henze, A. Koesling, D. Krause, and D. Olmedilla. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 1--14. Berlin, Heidelberg, Springer Verlag, (November 2007)
F. Abel, J. Coi, N. Henze, A. Koesling, D. Krause, and D. Olmedilla. Proceedings of the 6th International Semantic Web Conference and
2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 1--14. Berlin, Heidelberg, Springer Verlag, (November 2007)
E. Agirre, and A. Soroa. Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007), page 7--12. Prague, Czech Republic, Association for Computational Linguistics, (June 2007)
R. Agrawal, T. Imielinski, and A. Swami. SIGMOD '93: Proceedings of the 1993 ACM SIGMOD international conference on Management of data, page 207--216. New York, NY, USA, ACM Press, (1993)