EP0198932A1
Expired / Lapsed
EP
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Extension arrangement and station connecting method for a ring communication system
Assignee: International Business Machines Corp
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Filing: 1985-04-23
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Granted: —
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Expires: 2005-04-23
Abstract
Abstract A ring communication system comprises distribution panels (13) for inserting extension lines (15) and attached stations (19) into the communication ring (11); insertion is requested and controlled by DC signaling from the station via a phantom path. To allow attachment of several stations via additional extension lines (25) to a single basic extension line (15), extension distribution panels (23) are provided comprising line insertion modules (31) like the basic distribution panels. Insertion of a station and its additional extension line (25) up to the EXP is still controlled by DC signaling from the station, but insertion of the basic extension line(15) is controlled by a tone signal transferred from the EXP to the basic distribution panel via a phantom path. The EXP (23) needs no own power supply because DC power is provided from the basic distribution panel (13) via the phantom circuit of the basic extension line.
Inventors
- 👤 Heinz Josef Keller
- 👤 Johann Rudolf Mueller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:58
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
232 words
Arrangement for connecting stations (19) to a ring communication network (11) including a plurality of distribution panels (13) each of which comprises line insertion modules (31) to which extension lines (15) are attached, and in which each of said line insertion modules includes means (43, 45) for inserting the respective extension line plus a remotely connected station into the ring upon receiving a DC current from said station, characterized by - an extension panel (23) which is connected to the remote end of an extension line (15) for attaching a plurality of stations to the respective extension line; - a plurality of line insertion modules (31) in said extension panel each for connecting one station and a branch line by which said station is attached to the extension panel, into the respective extension line (15) upon receiving a DC current from said station; - auxiliary means (83) in said extension panel for sending an AC signaling indication over the respective extension line (15) to the respective distribution panel (13) when one of the line insertion modules of said extension panel receives a DC current from an attached station; and - means (45, 69, 73, 75) in each distribution panel for receiving an AC signaling indication and for inserting an extension line to which an extension panel is connected, upon reception of an AC signaling indication from said extension panel, into the ring.
Claim 2
Dependent Claim
232 words
Arrangement for connecting stations (19) to a ring communication network (11) including a plurality of distribution panels (13) each of which comprises line insertion modules (31) to which extension lines (15) are attached, and in which each of said line insertion modules includes means (43, 45) for inserting the respective extension line plus a remotely connected station into the ring upon receiving a DC current from said station, characterized by - an extension panel (23) which is connected to the remote end of an extension line (15) for attaching a plurality of stations to the respective extension line; - a plurality of line insertion modules (31) in said extension panel each for connecting one station and a branch line by which said station is attached to the extension panel, into the respective extension line (15) upon receiving a DC current from said station; - auxiliary means (83) in said extension panel for sending an AC signaling indication over the respective extension line (15) to the respective distribution panel (13) when one of the line insertion modules of said extension panel receives a DC current from an attached station; and - means (45, 69, 73, 75) in each distribution panel for receiving an AC signaling indication and for inserting an extension line to which an extension panel is connected, upon reception of an AC signaling indication from said extension panel, into the ring.
Claim 3
Dependent Claim
8 words
Arrangement according to claim 1, characterized in that
Claim 4
Dependent Claim
57 words
- each distribution panel (13) comprises additional means (69, 71) for sending DC power to an attached extension panel (23) via an extension line (15), and that - said extension panel includes means (85, 87, 89) for receiving DC power from a distribution panel and for applying this DC power at least to said auxiliary means (83).
Claim 5
Dependent Claim
57 words
- each distribution panel (13) comprises additional means (69, 71) for sending DC power to an attached extension panel (23) via an extension line (15), and that - said extension panel includes means (85, 87, 89) for receiving DC power from a distribution panel and for applying this DC power at least to said auxiliary means (83).
Claim 6
Dependent Claim
51 words
Arrangement according to claim 2, characterized in that - each distribution panel (13) comprises switches (69, SW2) for connecting a phantom circuit (P1, P2) of an extension line (15) either to a DC current receiving circuit (43), or to a DC power source (71) and to an AC signal detector (73).
Claim 7
Dependent Claim
125 words
Method for connecting a workstation to a ring communication network via a basic switching unit, a basic extension line, a remote switching unit, and a remote extension line, comprising the steps of: - sending a DC signal as insertion request from the workstation via the remote extension line to the remote switching unit, - connecting, in the remote switching unit in response to the DC signal insertion request, the remote extension line to the basic extension line, - sending an AC signal as insertion request from the remote switching unit via the basic extension line to the basic switching unit, and - connecting, in the basic switching unit in response to the AC signal insertion request, the basic extension line to the main ring network.
Claim 8
Dependent Claim
125 words
Method for connecting a workstation to a ring communication network via a basic switching unit, a basic extension line, a remote switching unit, and a remote extension line, comprising the steps of: - sending a DC signal as insertion request from the workstation via the remote extension line to the remote switching unit, - connecting, in the remote switching unit in response to the DC signal insertion request, the remote extension line to the basic extension line, - sending an AC signal as insertion request from the remote switching unit via the basic extension line to the basic switching unit, and - connecting, in the basic switching unit in response to the AC signal insertion request, the basic extension line to the main ring network.
Claim 9
Dependent Claim
38 words
A method according to claim 4, characterized by the additional step of - furnishing DC power from the basic switching unit via the basic extension line to the remote switching unit, at least for generating said AC signal.
Claim 10
Dependent Claim
39 words
A method according to claim 5, characterized in that - said sending of a DC signal and an AC signal and said furnishing of DC power is effected via phantom circuits constituted by said basic and remote extension lines.
References Cited (Backward Citations)
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