Inventor
SCHMUTZLER WERNER
DE3 patents
Patents
3 patentsUS4882742ANov 21, 1989
Method for measuring resistances, in particular resistances of subscriber's
SIEMENS AG4 citations58
US4839920AJun 13, 1989
Method for determining telephone dial pulse parameters independently of subscriber line length
SIEMENS AG6 citations58
US4691337ASep 1, 1987
Method and apparatus for determining the value of analog voltages occurring on telephone subscriber lines of a digital telephone exchange
SIEMENS AG4 citations57