ISDN interface unit with separate ring generator

• US 5,563,943 A
• Filed: 04/21/1995
• Issued: 10/08/1996
• Est. Priority Date: 11/29/1990
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Okuyama, Satoshi, Matsukura, Ryuichi, Takebayashi, Tomoyoshi, Hasegawa, Hiroki, Azami, Toshihiro
• Primary Examiner(s): Zele, Krista M.
• Assistant Examiner(s): Kumar, Devendra
• Application Number:
  US08/426,383
• Time in Patent Office: 536 Days
• Field of Search: 379/373, 379/418, 379/375, 370/110.1
• US Class Current: 379/373.01
• CPC Class Codes: H04Q 11/0471 Terminal access circuits
• CPC Class Codes: H04Q 2213/093 Personal computer
• CPC Class Codes: H04Q 2213/103 Memories
• CPC Class Codes: H04Q 2213/13031 Pulse code modulation, PCM
• CPC Class Codes: H04Q 2213/13034 A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/1309 Apparatus individually associated with a subscriber line, line circuits
• CPC Class Codes: H04Q 2213/13093 Personal computer, PC
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13174 Data transmission, file transfer
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13199 Modem, modulation
• CPC Class Codes: H04Q 2213/13202 Network termination [NT]
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13214 Clock signals
• CPC Class Codes: H04Q 2213/1327 Release and resetting of connection
• CPC Class Codes: H04Q 2213/13271 Forced release
• CPC Class Codes: H04Q 2213/13292 Time division multiplexing, TDM
• CPC Class Codes: H04Q 2213/13297 Coupling different rates in TDM systems, data rate adaptation
• CPC Class Codes: H04Q 2213/13299 Bus
• CPC Class Codes: H04Q 2213/1332 : Logic circuits
• CPC Class Codes: H04Q 2213/13322 : Integrated circuits
• CPC Class Codes: H04Q 2213/1336 : Synchronisation
• CPC Class Codes: H04Q 2213/214 : Phase shifted impulses; Clock signals; Timing
• CPC Class Codes: H04Q 2213/292 : Time (de)multiplexing
• CPC Class Codes: H04Q 2213/32 : Logic elements
• CPC Class Codes: H04Q 2213/322 : Integrated circuit
• CPC Class Codes: H04Q 2213/36 : Synchronisation

Abstract

An ISDN interface unit interconnects a data processing unit, an ISDN, and an analog telephone and includes a ring sound controller for supplying a control signal to designate a generation of a ring of the analog telephone through a modular jack; a ring signal generator generating a ring sound; a switch selecting one of the ring sounds generated and supplying the ring sound to the analog telephone. Further, the ISDN interface unit comprises communication functions for the digital signal and for the voice band signal, a control channel signal sent from the ISDN line is interpreted, and one of the communication functions can be selected.

Claims

1. An ISDN interface apparatus for processing an interface process to an ISDN and to an analog telephone, comprising:

an ISDN interface unit having a ring signal controller for supplying a control signal to designate a generation of a ring of the analog telephone when a connection is designated to the analog telephone from the ISDN; and

a ring signal generator unit, connected to the ISDN interface unit through a first modular jack and connected to the analog telephone through a second modular jack, having a ring signal generator for generating a ring signal to obtain the ring of the analog telephone and switch means for selecting one of the ring signal generated by the ring signal generator and a voice signal output through the first and second modular jacks and for supplying the selected signal to the analog telephone, wherein

the switch means supplies the ring signal generated by the ring signal generator to the analog telephone when the ring signal controller outputs the control signal.

2. An ISDN interface apparatus for processing an interface process to an ISDN and to an analog telephone, comprising:

an ISDN interface unit having a ring sound controller for supplying a control signal to designate a generation of a ring sound of the analog telephone when a connection is designated to the analog telephone from the ISDN; and

a ring sound generator unit, connected to the ISDN interface unit through a first modular jack and connected to the analog telephone through a second modular jack, having a sounder for generating a ring sound of the analog telephone, wherein

the sounder generates the ring sound when the ring sound controller outputs the control signal.