GB1397760A – Pcm tdm telecommunication network systems
– Google Patents
GB1397760A – Pcm tdm telecommunication network systems
– Google Patents
Pcm tdm telecommunication network systems
Info
Publication number
GB1397760A
GB1397760A
GB5315272A
GB5315272A
GB1397760A
GB 1397760 A
GB1397760 A
GB 1397760A
GB 5315272 A
GB5315272 A
GB 5315272A
GB 5315272 A
GB5315272 A
GB 5315272A
GB 1397760 A
GB1397760 A
GB 1397760A
Authority
GB
United Kingdom
Prior art keywords
bits
bit
clock
blind
delay
Prior art date
1971-07-30
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
GB5315272A
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 Schweiz AG
Original Assignee
Siemens Albis AG
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.)
1971-07-30
Filing date
1972-11-17
Publication date
1975-06-18
1972-11-17
Application filed by Siemens Albis AG
filed
Critical
Siemens Albis AG
1975-06-18
Publication of GB1397760A
publication
Critical
patent/GB1397760A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04J—MULTIPLEX COMMUNICATION
H04J3/00—Time-division multiplex systems
H04J3/02—Details
H04J3/06—Synchronising arrangements
H04J3/07—Synchronising arrangements using pulse stuffing for systems with different or fluctuating information rates or bit rates
H04J3/073—Bit stuffing, e.g. PDH
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
Abstract
1397760 Multiplex pulse code signalling SIEMENS-ALBIS AG 17 Nov 1972 53152/72 Heading H4L A p.c.m.-t.d.m. exchange (V si O, Fig. 1, not shown) which clocks received data into a buffer store PS, Fig. 3, at the received data bit-rate and clocks it out at its own bit rate, uses socalled blind bits and inhibition of the local clock TG to correct undesired pulse-frame shifts arising from extraneous causes. The start-bits I, II, III, Fig. 2a, of respective data frames from other exchanges V st 1-3, when formed to arrive during the time # preceding the start-bit # of the receiving exchangedata-frame, are appropriately delayed by the buffer PS and read out by the local clock TG. If however they arrive in the interval γ and require a delay of less than this minimum value γ, then the exchange inserts blind bits to delay #. Correction for undesired frame shifts may be effected by similar use of these blind bits. If however the frame shift exceeds the maximum buffer storage time # (which in practice also equals T) then inhibition of the clock is effected, preferably for a period of ¢ #. Each blind bit is generated by a control circuit BB in response to coincidence at UBB of a received start bit ae from a synchronizing word detector SE connected to the incoming line, and a signal from bi-stable CA or AP which generate outputs respectively corresponding to the γ and r periods. Counters Zp and Zpc and dividers B, K control these bi-stables in response to the clock TG. The clock is inhibited by a circuit SS for a period such as ¢#, determined by a delay therein, when the circuit SS senses no received start-bits ae from SE during the # period as represented by the output of another bi-stable PA.
GB5315272A
1971-07-30
1972-11-17
Pcm tdm telecommunication network systems
Expired
GB1397760A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
CH1122971A
CH535515A
(en)
1971-07-30
1971-07-30
Method for correcting pulse frame shifts in a PCM time division multiplex telecommunications network
Publications (1)
Publication Number
Publication Date
GB1397760A
true
GB1397760A
(en)
1975-06-18
Family
ID=4371381
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5315272A
Expired
GB1397760A
(en)
1971-07-30
1972-11-17
Pcm tdm telecommunication network systems
Country Status (7)
Country
Link
BE
(1)
BE792301A
(en)
CH
(1)
CH535515A
(en)
DE
(1)
DE2221278C3
(en)
FR
(1)
FR2206892A5
(en)
GB
(1)
GB1397760A
(en)
IL
(1)
IL40004A
(en)
NL
(1)
NL7209199A
(en)
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4935921A
(en)
*
1986-09-30
1990-06-19
Nec Corporation
Cross-connection network using time switch
0
BE
BE792301D
patent/BE792301A/en
unknown
1971
1971-07-30
CH
CH1122971A
patent/CH535515A/en
not_active
IP Right Cessation
1972
1972-04-29
DE
DE2221278A
patent/DE2221278C3/en
not_active
Expired
1972-06-30
NL
NL7209199A
patent/NL7209199A/xx
unknown
1972-07-26
IL
IL40004A
patent/IL40004A/en
unknown
1972-11-16
FR
FR7240686A
patent/FR2206892A5/fr
not_active
Expired
1972-11-17
GB
GB5315272A
patent/GB1397760A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2221278C3
(en)
1974-01-17
IL40004A0
(en)
1972-09-28
IL40004A
(en)
1975-06-25
NL7209199A
(en)
1973-02-01
DE2221278B2
(en)
1973-06-07
BE792301A
(en)
1973-03-30
CH535515A
(en)
1973-03-31
DE2221278A1
(en)
1973-02-15
FR2206892A5
(en)
1974-06-07
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Legal Events
Date
Code
Title
Description
1975-10-29
PS
Patent sealed [section 19, patents act 1949]
1982-06-23
PCNP
Patent ceased through non-payment of renewal fee
