GB1332387A – Communication switching systems
– Google Patents
GB1332387A – Communication switching systems
– Google Patents
Communication switching systems
Info
Publication number
GB1332387A
GB1332387A
GB3572571A
GB3572571A
GB1332387A
GB 1332387 A
GB1332387 A
GB 1332387A
GB 3572571 A
GB3572571 A
GB 3572571A
GB 3572571 A
GB3572571 A
GB 3572571A
GB 1332387 A
GB1332387 A
GB 1332387A
Authority
GB
United Kingdom
Prior art keywords
register
line
information
rate
network
Prior art date
1970-07-30
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
GB3572571A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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.)
1970-07-30
Filing date
1971-07-29
Publication date
1973-10-03
1971-07-29
Application filed by Western Electric Co Inc
filed
Critical
Western Electric Co Inc
1973-10-03
Publication of GB1332387A
publication
Critical
patent/GB1332387A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04Q—SELECTING
H04Q11/00—Selecting arrangements for multiplex systems
H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
H04Q11/06—Time-space-time switching
Abstract
1332387 Automatic exchange equipment WESTERN ELECTRIC CO Inc 29 July 1971 [30 July 1970] 35725/71 Heading H4K Crosstalk within the switching network of an exchange is reduced by making the transmission rate for signals transmitted across the network less than the transmission rate of the signals on TDM lines connected to stores associated with the network. Preferably the information is transmitted in PCM form and comprises seven bits with one supervisory bit. In the figure showing one side of a switching network the TDM line 5 is equipped for 4 wire operation and has 24 channels (time slots) carrying information at a rate of 1544 megabits/sec. Associated with each line are 24 PCM trunks 8-1 to 8-24 each of which transmits the information contained in one time slot of line 5, after it has been stored in A shift register 109. When the required connection is made through network 15, register 109 is outpulsed at the cross-office rate of 82À7 megabits/sec., which speed is slow enough to eliminate crosstalk between the connections in the switching network and the received information stored in a B shift register, Fig. 2 (not shown) which is similar to the E shift register 127. Bi-stable circuits U, V and W work with counter 132 to transfer the information to the F shift register 125 at the TDM line rate of 1544 megabits/sec. and the register 125 is then outpulsed at this rate on to line 5. The information that is stored in register 109 is preceeded by an initial bit so that 9 bits are transmitted across the office. On arrival at the E register the initial bit is used to set a bistable U so that only 8 bits are transmitted to the F register and thence on to line 5. The switching network preferably comprises cross-bar switches.
GB3572571A
1970-07-30
1971-07-29
Communication switching systems
Expired
GB1332387A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US5953270A
1970-07-30
1970-07-30
Publications (1)
Publication Number
Publication Date
GB1332387A
true
GB1332387A
(en)
1973-10-03
Family
ID=22023571
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3572571A
Expired
GB1332387A
(en)
1970-07-30
1971-07-29
Communication switching systems
Country Status (9)
Country
Link
US
(1)
US3652803A
(en)
JP
(1)
JPS5224809B1
(en)
BE
(1)
BE770616A
(en)
CA
(1)
CA947852A
(en)
DE
(1)
DE2137923C3
(en)
FR
(1)
FR2105832A5
(en)
GB
(1)
GB1332387A
(en)
NL
(1)
NL167291C
(en)
SE
(1)
SE377024B
(en)
Families Citing this family (10)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3764998A
(en)
*
1972-08-04
1973-10-09
Bell & Howell Co
Methods and apparatus for removing parity bits from binary words
US3883855A
(en)
*
1973-09-27
1975-05-13
Stromberg Carlson Corp
Control system for a digital switching network
US3908092A
(en)
*
1973-12-21
1975-09-23
Bell Telephone Labor Inc
Program controlled time division switching systems
DE2511619B2
(en)
*
1975-03-17
1977-03-31
Siemens AG, 1000 Berlin und 8000 München
PROCESS FOR TRANSMISSION OF DIGITAL INFORMATION OF A PCM TIME MULTIPLEX REMOTE NETWORK
US4022979A
(en)
*
1975-12-29
1977-05-10
Bell Telephone Laboratories, Incorporated
Automatic in-service digital trunk checking circuit and method
JPS5923809U
(en)
*
1982-08-03
1984-02-14
株式会社フジクラ
Inrush current prevention circuit for automobiles
US4641318A
(en)
*
1985-04-25
1987-02-03
Bell Communications Research, Inc.
Method for improving the reliability of data transmission over Rayleigh fading channels
US5228029A
(en)
*
1990-02-27
1993-07-13
Motorola, Inc.
Cellular tdm communication system employing offset frame synchronization
US5268903A
(en)
*
1991-10-02
1993-12-07
Rockwell International Corporation
Multichannel telephonic switching network with different signaling formats and cross connect/PBX treatment selectable for each channel
US6108333A
(en)
*
1998-02-25
2000-08-22
Lucent Technologies Inc.
Nonblocking synchronous digital hierarchy column cross-point switch
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NL274894A
(en)
*
1961-02-20
BE583834A
(en)
*
1961-11-03
US3299204A
(en)
*
1962-08-29
1967-01-17
Nat Res Dev
Television and like data transmission systems
US3458659A
(en)
*
1965-09-15
1969-07-29
New North Electric Co
Nonblocking pulse code modulation system having storage and gating means with common control
1970
1970-07-30
US
US59532A
patent/US3652803A/en
not_active
Expired – Lifetime
1971
1971-02-08
CA
CA104,762A
patent/CA947852A/en
not_active
Expired
1971-07-22
SE
SE7109426A
patent/SE377024B/xx
unknown
1971-07-28
BE
BE770616A
patent/BE770616A/en
unknown
1971-07-29
DE
DE2137923A
patent/DE2137923C3/en
not_active
Expired
1971-07-29
NL
NL7110479.A
patent/NL167291C/en
not_active
IP Right Cessation
1971-07-29
FR
FR7127919A
patent/FR2105832A5/fr
not_active
Expired
1971-07-29
GB
GB3572571A
patent/GB1332387A/en
not_active
Expired
1971-07-30
JP
JP46056839A
patent/JPS5224809B1/ja
active
Pending
Also Published As
Publication number
Publication date
DE2137923C3
(en)
1973-11-08
NL167291B
(en)
1981-06-16
NL167291C
(en)
1981-11-16
BE770616A
(en)
1971-12-01
NL7110479A
(en)
1972-02-01
JPS5224809B1
(en)
1977-07-04
SE377024B
(en)
1975-06-16
DE2137923B2
(en)
1973-04-12
DE2137923A1
(en)
1972-02-03
CA947852A
(en)
1974-05-21
FR2105832A5
(en)
1972-04-28
US3652803A
(en)
1972-03-28
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Legal Events
Date
Code
Title
Description
1974-02-13
PS
Patent sealed [section 19, patents act 1949]
1991-08-28
PE20
Patent expired after termination of 20 years
