GB1528240A – Conference circuits for telephone exchanges of digital type
– Google Patents
GB1528240A – Conference circuits for telephone exchanges of digital type
– Google Patents
Conference circuits for telephone exchanges of digital type
Info
Publication number
GB1528240A
GB1528240A
GB32050/76A
GB3205076A
GB1528240A
GB 1528240 A
GB1528240 A
GB 1528240A
GB 32050/76 A
GB32050/76 A
GB 32050/76A
GB 3205076 A
GB3205076 A
GB 3205076A
GB 1528240 A
GB1528240 A
GB 1528240A
Authority
GB
United Kingdom
Prior art keywords
codes
conference
subscribers
pair
combined
Prior art date
1975-07-31
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.)
Expired
Application number
GB32050/76A
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.)
Siemens SpA
Original Assignee
Siemens SpA
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.)
1975-07-31
Filing date
1976-08-02
Publication date
1978-10-11
1976-08-02
Application filed by Siemens SpA
filed
Critical
Siemens SpA
1978-10-11
Publication of GB1528240A
publication
Critical
patent/GB1528240A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
H04M3/00—Automatic or semi-automatic exchanges
H04M3/42—Systems providing special services or facilities to subscribers
H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing
Abstract
1528240 Conference circuits SOC ITALIANA TELECOMUNICAZIONI SIEMENS SpA 2 Aug 1976 [31 July 1975] 32050/76 Heading H4K In a conference circuit compressed P.C.M. codes are numerically combined in compressed form. In one embodiment described codes from three subscribers and each comprising a base (mantissa) and a segment number (compression factor or exponent plus a sign bit) are stored in an input unit (Fig. 3, not shown), forwarded in pairs to a preprocessing unit (Fig. 4, not shown) having two pairs of stores for the bases and segment numbers and arranged to shift the digits (bits) of the base of one code of each pair to the right or left through a number of digit positions equal to the difference between the segment numbers of that pair of codes and calculated by a first processing unit (Fig. 5, not shown), then further forwarded to a second processing unit (Fig. 6, not shown) which adds or subtracts in accordance with the sign bits the two bases of each pair to generate sum or difference codes. A four subscriber conference system (Fig. 9, not shown) is described. Six time channels are utilized. Codes from subscribers A and B are added to form partial sums which are combined with codes from subscribers C and D using three channels in a manner similar to a three party conference to provide B+C+D and A+C+D and codes from C and D are added to form partial sums C + D which are combined with codes from A and B to give A+B+D and A+B+C.
GB32050/76A
1975-07-31
1976-08-02
Conference circuits for telephone exchanges of digital type
Expired
GB1528240A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
IT25950/75A
IT1040208B
(en)
1975-07-31
1975-07-31
CNFERENCE CIRCUIT FOR SWITCHING TELEPHONE CONTROL UNITS OF NUMPERIC TYPE
Publications (1)
Publication Number
Publication Date
GB1528240A
true
GB1528240A
(en)
1978-10-11
Family
ID=11218237
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB32050/76A
Expired
GB1528240A
(en)
1975-07-31
1976-08-02
Conference circuits for telephone exchanges of digital type
Country Status (12)
Country
Link
JP
(1)
JPS5218108A
(en)
AR
(1)
AR209981A1
(en)
AU
(1)
AU497812B2
(en)
BR
(1)
BR7604885A
(en)
DE
(1)
DE2634345A1
(en)
FR
(1)
FR2320015A1
(en)
GB
(1)
GB1528240A
(en)
IN
(1)
IN143837B
(en)
IT
(1)
IT1040208B
(en)
NL
(1)
NL7608295A
(en)
SE
(1)
SE7608445L
(en)
TR
(1)
TR19323A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4408323A
(en)
1981-06-29
1983-10-04
Bell Telephone Laboratories, Incorporated
Processor facilities for integrated packet and voice switching
GB2128448A
(en)
*
1982-10-08
1984-04-26
Standard Telephones Cables Ltd
Telephone exchange conference circuit
USRE31651E
(en)
*
1977-10-12
1984-08-21
Bell Telephone Laboratories, Incorporated
Communication system using intelligent network processor
Families Citing this family (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4112258A
(en)
*
1977-10-12
1978-09-05
Bell Telephone Laboratories, Incorporated
Communication system using intelligent network processor
DE3005739C2
(en)
*
1980-02-15
1988-11-10
Nixdorf Computer Ag, 4790 Paderborn
Method for controlling the transmission of PCM signals between connection points of a PCM time division multiplex telecommunications network in a conference operation and circuit arrangement for carrying out the method
GB2103848B
(en)
*
1981-08-20
1985-04-11
Standard Telephones Cables Ltd
Pcm system
FR2524750A1
(en)
*
1982-03-30
1983-10-07
Telecommunications Sa
MULTISALLE VISIOCONFERENCE SYSTEM
FR2533784B1
(en)
*
1982-09-28
1989-06-30
Thomson Csf Mat Tel
MULTIPLE CONFERENCE DEVICE FOR MIC TIME STICKERS WITH CONNECTION NETWORK
1975
1975-07-31
IT
IT25950/75A
patent/IT1040208B/en
active
1976
1976-06-16
IN
IN1055/CAL/76A
patent/IN143837B/en
unknown
1976-07-15
TR
TR19323A
patent/TR19323A/en
unknown
1976-07-19
FR
FR7621920A
patent/FR2320015A1/en
active
Granted
1976-07-26
SE
SE7608445A
patent/SE7608445L/en
unknown
1976-07-27
NL
NL7608295A
patent/NL7608295A/en
not_active
Application Discontinuation
1976-07-28
BR
BR7604885A
patent/BR7604885A/en
unknown
1976-07-29
AR
AR264137A
patent/AR209981A1/en
active
1976-07-29
AU
AU16365/76A
patent/AU497812B2/en
not_active
Expired
1976-07-29
JP
JP51089769A
patent/JPS5218108A/en
active
Pending
1976-07-30
DE
DE19762634345
patent/DE2634345A1/en
not_active
Withdrawn
1976-08-02
GB
GB32050/76A
patent/GB1528240A/en
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
USRE31651E
(en)
*
1977-10-12
1984-08-21
Bell Telephone Laboratories, Incorporated
Communication system using intelligent network processor
US4408323A
(en)
1981-06-29
1983-10-04
Bell Telephone Laboratories, Incorporated
Processor facilities for integrated packet and voice switching
GB2128448A
(en)
*
1982-10-08
1984-04-26
Standard Telephones Cables Ltd
Telephone exchange conference circuit
US4566096A
(en)
*
1982-10-08
1986-01-21
Standard Telephones And Cables, Public Limited Company
Telephone exchange conference circuit
Also Published As
Publication number
Publication date
FR2320015A1
(en)
1977-02-25
TR19323A
(en)
1978-11-28
AU1636576A
(en)
1978-02-02
DE2634345A1
(en)
1977-02-17
BR7604885A
(en)
1977-08-09
SE7608445L
(en)
1977-05-09
IN143837B
(en)
1978-02-11
NL7608295A
(en)
1977-02-02
AU497812B2
(en)
1979-01-11
JPS5218108A
(en)
1977-02-10
IT1040208B
(en)
1979-12-20
AR209981A1
(en)
1977-06-15
FR2320015B1
(en)
1981-09-25
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Erdős et al.
2020
Digital Root
Legal Events
Date
Code
Title
Description
1979-01-31
PS
Patent sealed
1983-03-09
PCNP
Patent ceased through non-payment of renewal fee
