Title:
CONNECTING SYSTEM FOR TELEPHONE DEVICE
Document Type and Number:
Japanese Patent JPS579156
Kind Code:
A
Abstract:
PURPOSE: To prevent the deterioration of filtering characteristic of a filter, by connecting each telephone set and line via an impedance circuit.
CONSTITUTION: An LPF3, channel circuit 4 and handset 5 are connected to an extension 2. An HPF6, transmission/reception circuit 7 and control circuit 8 are connected to the extension 2. The characteristics of the filters 3, 6 can be compensated regardless of the variation of number of telephone sets connected to the extension 2, by connecting an impedance circuit 15 to the connection with the extension 2.
Inventors:
MORIKAMI EIJI
OOBA TAKEO
SHINTANI HIROZOU
OOBA TAKEO
SHINTANI HIROZOU
Application Number:
JP8273880A
Publication Date:
January 18, 1982
Filing Date:
June 20, 1980
Export Citation:
Assignee:
IWATSU ELECTRIC CO LTD
International Classes:
H04Q3/58; H04Q5/00; H04Q5/24; (IPC1-7): H04M1/72; H04Q3/58; H04Q5/02
Next Patent: CONNECTING SYSTEM FOR TELEPHONE DEVICE