EP0143489A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Supervisory arrangement for a digital transmission system
Assignee: Koninklijke Philips NV
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Filing: 1984-11-14
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Granted: —
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Expires: 2004-11-14
Abstract
Abstract Method of controlling a supervisory arrangement of a digital transmission system in which a plurality of repeaters are arranged between two terminal stations, a terminal station transmitting a call message which is provided with an address number towards the desired repeater. In each repeater passed-through the received address number is increased by a fixed number, for example 1, and thereafter compared with another fixed number, for example O. The repeater which detects that the increased address number received is equal to the other fixed number transmits its service information towards at least one terminal station. This accomplishes that all said repeaters may be of an identical construction.
Inventors
- 👤 Alberto Maria Giacometti
- 👤 Hans Gruijs
- 👤 Coos De Vries
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
H; H04; H04Q; H04Q9/00; H04Q9/14; H04Q9/16; H04B; H04B17/00; H04B17/40; H04B17/401; H04B17/406
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
A method of controlling a supervisory arrangement in a digital transmission system in which a plurality of repeaters are arranged between two terminal stations, a call message including an address number being transmitted by a terminal station towards the desired repeater, characterized in that the address number is equal to B - N.A., wherein B and A are fixed numbers and N is equal to the number of repeaters located between the terminal station and the desired repeater, the address number being increased by the number A in each repeater passed through, and it being checked in that repeater whether the received address number is equal or unequal to the number B, whereafter when there is inequality the increased address number is conveyed together with the call message of the terminal station to the next repeater and whereafter, if there is equality, an address number C, wherein C is defined by the relation C + M.A. ≠B, wherein M is any positive integer and is not more than equal to the maximum number of repeaters in the link between two terminal stations, and the service information of the relevant repeater is conveyed towards at least one of the terminal stations.
Claim 2
Independent Claim
200 words
A method of controlling a supervisory arrangement in a digital transmission system in which a plurality of repeaters are arranged between two terminal stations, a call message including an address number being transmitted by a terminal station towards the desired repeater, characterized in that the address number is equal to B - N.A., wherein B and A are fixed numbers and N is equal to the number of repeaters located between the terminal station and the desired repeater, the address number being increased by the number A in each repeater passed through, and it being checked in that repeater whether the received address number is equal or unequal to the number B, whereafter when there is inequality the increased address number is conveyed together with the call message of the terminal station to the next repeater and whereafter, if there is equality, an address number C, wherein C is defined by the relation C + M.A. ≠B, wherein M is any positive integer and is not more than equal to the maximum number of repeaters in the link between two terminal stations, and the service information of the relevant repeater is conveyed towards at least one of the terminal stations.
Claim 3
Dependent Claim
447 words
A supervisory arrangement for performing a method as claimed in Claim 1, wherein a series arrangement of a supervising signal receiver, a first control circuit and a supervising signal transmitter is provided between the input and the output of each repeater, the control circuit having a first terminal for receiving service information from the relevant repeater, characterized in that an input (14) of the control circuit (50) is connected to the input of a demultiplexer (51) a first output (69) of which is coupled to a first input (6 4 ) of a change-over switch (59) and a second output (70) of which is connected to both an input of an adder circuit (52) and an input of a comparator circuit (54), the fixed number A being added in the adder circuit (52) to the address number and the received address number being compared in the comparator circuit (54) with the number B, an output (73) of the adder circuit (52) being connected to a second input (66) of the change-over switch (59), an output (61) of the comparator circuit (54) being connectable to a control circuit (58) of the change-over switch (59) via connecting means (76), a third input (63) of the change-over switch (59) being connected to said terminal (9) of the control circuit (50) and a fourth input (65) of the change-over switch (59) being connected to a number generator (56) supplying the third fixed number C . the control circuit (58) supplying such a control signal that when the address number is equal to B the third and fourth inputs (63, 65) of the change-over switch (59) are coupled to its output (67, 68) and that, when the address number is unequal to B the first and second inputs (64, 66) of the change-over switch (59) are coupled to its outputs (67, 68), the outputs (67, 68) of the change-over switch (59) being coupled to the output (15) of the control circuit (50) via a multiplexer (60). 3a A supervisory arrangement as claimed in Claim 2, comprising a second control circuit (500) whose construction is the same as the construction of the first control circuit (50), characterized in that the output (61) of the comparator circuit (54) of the first control circuit (50) is connectable via connecting means (74) to the control input (620) of the control circuit (580) of the change-over switch (590) of the second control circuit (500) and that the output (610) of the comparator circuit (540) of the second control circuit (500) is connectable via connecting means (75) to the control input (62) of the control circuit (58) of the change-over switch (59) of the first control circuit (50).
Claim 4
Dependent Claim
133 words
A supervisory arrangement as claimed in Claim 1 or 2, characterized in that the first control circuit (50) has a second terminal (90) for receiving alarm signals, this terminal (90) being connected to an input of an alarm circuit (91) and also to a first switching contact (96) of a switch (98) whose second switching contact (97) is connected to a first output (69) of the demultiplexer (51) and whose master contact (95) is connected to the third input (63) of the change-over switch (59), an output of the alarm circuit (91) being connected to an input of an AND-gate (92), a further input of which is connected to the input of the control circuit (58), an output of the gate (92) being coupled to the switch (98) via a delay circuit (93).
References Cited (Backward Citations)
US4161634A
Cited
FR2467511A1
Cited
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