JPS6481442A - Variable band compression and connection system - Google Patents

Variable band compression and connection system

Info

Publication number
JPS6481442A
JPS6481442A JP23963187A JP23963187A JPS6481442A JP S6481442 A JPS6481442 A JP S6481442A JP 23963187 A JP23963187 A JP 23963187A JP 23963187 A JP23963187 A JP 23963187A JP S6481442 A JPS6481442 A JP S6481442A
Authority
JP
Japan
Prior art keywords
vpcm
mux
telephone
sends out
transmission line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23963187A
Other languages
Japanese (ja)
Inventor
Shoichi Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP23963187A priority Critical patent/JPS6481442A/en
Publication of JPS6481442A publication Critical patent/JPS6481442A/en
Pending legal-status Critical Current

Links

Landscapes

  • Time-Division Multiplex Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To improve the connection rate in the highest intensity time in case of telephone and to prevent picture quality from deteriorating at the time fast data terminal origination by providing an encoding device and varying the compressibility of an information content per line according to conditions. CONSTITUTION:When a telephone set 12 originates during the origination of telephone sets 10 and 11, a variable band compression PCM multiplexing device VPCM-MUX 5 fall backs to 16kb/s per line automatically according to the 30GT busy conditions and sends out an encoded signal to a digital transmission line 6. Thus, the VPCM-MUX 5 varies the content of encoded information according to the number of busy outgoing lines among OGTs 40-43 and sends out the signal of the digital transmission line 6 of 64kb/s, so telephone calling is equivalent to that when trunk lines are increased by four times. Further, when a FAX 2 is connected to the VPCM-MUX 5, the VPCM-MUX 5 sends out a fast facsimile signal to the digital transmission line 6 without band compression. Consequently, the picture quality is prevented from deteriorating.
JP23963187A 1987-09-22 1987-09-22 Variable band compression and connection system Pending JPS6481442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23963187A JPS6481442A (en) 1987-09-22 1987-09-22 Variable band compression and connection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23963187A JPS6481442A (en) 1987-09-22 1987-09-22 Variable band compression and connection system

Publications (1)

Publication Number Publication Date
JPS6481442A true JPS6481442A (en) 1989-03-27

Family

ID=17047586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23963187A Pending JPS6481442A (en) 1987-09-22 1987-09-22 Variable band compression and connection system

Country Status (1)

Country Link
JP (1) JPS6481442A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03121665A (en) * 1989-03-02 1991-05-23 Eci Telecom Ltd Communication system
JPH04180441A (en) * 1990-11-15 1992-06-26 Nec Corp Compression and multiplexing system for transmission information

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03121665A (en) * 1989-03-02 1991-05-23 Eci Telecom Ltd Communication system
JPH04180441A (en) * 1990-11-15 1992-06-26 Nec Corp Compression and multiplexing system for transmission information

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