DIGITAL TELEPHONE SET CIRCUIT - NIPPON TELEGRAPH & TELEPHONE

Title:

DIGITAL TELEPHONE SET CIRCUIT

Document Type and Number:

Japanese Patent JPH06261155

Kind Code:

A

Abstract:

PURPOSE: To attain the unitary power down control to satisfy the prescriptions (less than 380mW in start-up mode and less than 25mW in power down mode) of an I interface in a digital telephone set circuit which receives the power from a feeding station and is connected to the basic interface of an ISDN.

CONSTITUTION: The current of a power down control part 16 supplied from a feeding station is limited by a connection or non-connection state detected by a connection detecting part 20. Then a power down control part 13 limits the supplied current based on the detection information of an incoming detecting part 14 and the waiting state set by a mode setting part 11.

Inventors:

KAWASHIMA MASAHIRO
MINE SHINICHI
INDO KIYOSHI

Application Number:

JP4759593A

Publication Date:

September 16, 1994

Filing Date:

March 09, 1993

Export Citation:

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Assignee:

NIPPON TELEGRAPH & TELEPHONE

International Classes:

H04M1/00; H04M1/253; H04M11/00; H04M19/08; (IPC1-7): H04M19/08; H04M1/00; H04M11/00

Attorney, Agent or Firm:

Namiki Akio

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