EP0173984A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
System for controlling the ISDN activation sequence
Assignee: Fujitsu Ltd
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Filing: 1985-08-30
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Granted: —
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Expires: 2005-08-30
Abstract
Abstract A digital subscriber line formed by terminal equipment ,(3), a network control device (NT) including a plurality of the terminal equipment, and an exchange terminal (1). In a waiting state of the digital subscriber line, the network control device (NT) is placed in a state which can only receive a signal. A sending portion of the network control device is driven when, at a call from the terminal equipment (3), the terminal control device receives a line activation signal from the exchange equipment (1) and when, at an incoming state from the state from the exchange terminal (1), the terminal control device receives a line activation from the exchange equipment. The synchronization pattern signal is sent from the sending portion to the exchange terminal (1) so that the synchronization of the exchange terminal is established.
Inventors
- 👤 Sumie Fujitsu Dai-Nana Fujigaoka-Ryo Okada
- 👤 Takashi Hoshikawa Shurosu 701 Nara
- 👤 Takashi Hatano
- 👤 Yutaka Kawato
- 👤 Ryoji Shimozono
- 👤 Kenji Tsutsumi
- 👤 Yasunori Okurayama Haimu 4-907 Ogawa
- 👤 Yasuo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 14:17
CPC Classifications
H; H04; H04L; H04L12/00; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04L12/02; H04L12/12; Y; Y10; Y10S; Y10S379/00; Y10S379/902
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A system for controlling a network activation sequence in a digital subscriber line constructed by terminal equipment (3), a network terminal (2) connected to a plurality of said terminal equipment, and an exchange terminal (1) provided in an office side, characterised in that when said digital subscriber line is in a waiting state, said network terminal (2) is rendered in a state in which only a signal can be received; and when a call is issued from said terminal equipment (3), a sending portion of said network terminal (2) is driven by receiving a network activation signal from said terminal equipment (3) and, when an incoming signal is received from said exchange terminal (1), a sending portion of said network terminal (2) is driven by receiving a network activation signal from said exchange terminal (1), so that a synchronization pattern signal is sent from said sending portion to said exchange terminal (1), whereby synchronization of said exchange terminal (1) is established.
Claim 2
Independent Claim
161 words
A system for controlling a network activation sequence in a digital subscriber line constructed by terminal equipment (3), a network terminal (2) connected to a plurality of said terminal equipment, and an exchange terminal (1) provided in an office side, characterised in that when said digital subscriber line is in a waiting state, said network terminal (2) is rendered in a state in which only a signal can be received; and when a call is issued from said terminal equipment (3), a sending portion of said network terminal (2) is driven by receiving a network activation signal from said terminal equipment (3) and, when an incoming signal is received from said exchange terminal (1), a sending portion of said network terminal (2) is driven by receiving a network activation signal from said exchange terminal (1), so that a synchronization pattern signal is sent from said sending portion to said exchange terminal (1), whereby synchronization of said exchange terminal (1) is established.
Claim 3
Dependent Claim
196 words
A system for controlling a network activation sequence according to claim 1, wherein when an activation sequence is carried out from said terminal equipment (3), said terminal equipment (3) sends out an activation request to said network terminal (2), when said network terminal (2) receives said activation request from said terminal equipment (3), said network terminal (2) sends a training pattern to said exchange terminal (1), when said exchange terminal (1) receives said training pattern from said network terminal (2) and frame synchronization is established, a signal which indicates the synchronization is established is sent from said exchange terminal (1) to said network terminal (2) and said network terminal informs said signal to said terminal equipment (3), when said terminal equipment (3) receives said signal and the frame synchronization is established, said terminal equipment (3) sends data pattern to said network terminal (2) and said network terminal informs that the data pattern is received to said exchange terminal, and when said exchange terminal (1) receives the information from said network terminal (2), the activate state is established, and this is informed from said exchange terminal (1) via said network terminal (2) to said terminal equipment (3).
Claim 4
Dependent Claim
202 words
A system for controlling a network activation sequence according to claim 1, wherein when the activation sequence is carried out from said exchange terminal (1), said exchange terminal (1) sends out an activation request to said network terminal (2), when said network terminal (2) detects said activation request, said network terminal sends a training pattern to said exchange terminal (1), when said exchange terminal (1) receives said training pattern from said network terminal (2) and a frame synchronization is established, a signal which indicates the synchronization is established is sent from said exchange terminal (1) to said network terminal (2) and said network terminal (2) informs said signal to said terminal equipment (3), when said terminal equipment (3) receives said signal and the frame synchronization is established, said terminal network (3) sends data pattern to said network terminal (2) and said network terminal (2) informs that the data pattern is received to said exchange terminal (1), and when said exchange terminal (1) receives the information from said network terminal (2), the activation state is established, and this is informed from said exchange terminal (1) via said network terminal (2) to said terminal equipment (3), so that said terminal equipment (3) is activated.
Claim 5
Dependent Claim
128 words
A system for controlling a network activation sequence according to claim 1, wherein communication is carried out by transmitting a burst signal alternately to the subscriber line connecting said exchange terminal (1) and said network terminal (2), a receiving level of a signal receiving equalizer in a network terminal (2) in said exchange terminal side is set at a suitable value by a signal transmitted by another party to establish synchronization, said network terminal (2) in said exchange terminal (1) is provided with means for initially setting the signal receiving equalizer until the synchronization is established with said network terminal (2) in said terminal side, and, when frame synchronization is established, the initial setting is interrupted so as to set a receiving level in said exchange terminal (1).
Claim 6
Dependent Claim
109 words
An ISDN subscriber line formed by an exchange terminal (1), a network terminal (2), and terminal equipment (3), characterised in that said exchange terminal (1) comprises a circuit for discriminating a maintenance signal (18), a circuit for outputting said maintenance signal (21), and a control means (11) for selecting the maintenance signal to be output in accordance with a signal which instructs the exchange terminal from a host device and/or a maintenance signal output from said network terminal (2), wherein said maintenance signal is selected and output to said network terminal (2) in accordance with the output signal from said network terminal and/or the signal from said host device.
Claim 7
Dependent Claim
109 words
An ISDN subscriber line formed by an exchange terminal (1), a network terminal (2), and terminal equipment (3), characterised in that said exchange terminal (1) comprises a circuit for discriminating a maintenance signal (18), a circuit for outputting said maintenance signal (21), and a control means (11) for selecting the maintenance signal to be output in accordance with a signal which instructs the exchange terminal from a host device and/or a maintenance signal output from said network terminal (2), wherein said maintenance signal is selected and output to said network terminal (2) in accordance with the output signal from said network terminal and/or the signal from said host device.
References Cited (Backward Citations)
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