WO1998041051A2 - So-SCHNITTSTELLE FÜR EINEN ISDN-BASISANSCHLUSS - Google Patents
So-SCHNITTSTELLE FÜR EINEN ISDN-BASISANSCHLUSS Download PDFInfo
- Publication number
- WO1998041051A2 WO1998041051A2 PCT/DE1998/000369 DE9800369W WO9841051A2 WO 1998041051 A2 WO1998041051 A2 WO 1998041051A2 DE 9800369 W DE9800369 W DE 9800369W WO 9841051 A2 WO9841051 A2 WO 9841051A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transmitter
- pair
- interface
- receiver
- wire
- Prior art date
Links
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
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0435—Details
- H04Q11/0471—Terminal access circuits
Definitions
- the invention relates to an S 0 interface for an ISDN base connection, via which a four-wire line with a pair of receiver lines and a pair of transmitter lines are connected to an ISDN terminal with potential isolation.
- the double line arriving from an ISDN network is converted into a four-wire interface at a subscriber's network connection.
- This interface between the ISDN network and a terminal is called the So interface.
- the four-wire line is divided into a pair of receiver lines for incoming signals and a pair of transmitter lines for outgoing signals.
- the transmission-related functions of this four-wire duplex method are implemented using a so-called So module, the connection between the lines and the So module being established with electrical isolation with one transmitter each in the receiver line pair and in the transmitter line pair.
- This electrical isolation has the disadvantage of increased damping due to parasitic ohmic loading by the transformer. Furthermore, the required transformers are relatively expensive.
- the invention is based on the object of specifying an interface of the type mentioned at the outset which is less expensive to manufacture and which nevertheless meets the high requirements for the transmission quality.
- the invention has the advantage that, despite fundamentally different transmission properties between a transmitter and a capacity, an equally good transmission quality can also be achieved with the pair of receiver lines, and in particular that the S 0 interface is also protected against lightning impulses.
- By connecting the line ends to a voltage amplifier incoming information cannot be detected if the input level falls below a certain threshold.
- the voltage level detection can be reliably achieved by this compensation.
- the single figure shows schematically the wiring of an So bus for electrical isolation.
- a four-wire line 1 represents the connection between a network termination at an ISDN base connection (not shown) and a control module 2 at the transition to a subscriber interface So.
- the four-wire line 1 consists of a pair of receiver lines SRI, SR2 and a pair of transmitter lines SX1, SX2.
- the interface-side part of the four-wire line 1 is electrically isolated from the device-side line ends. Potential isolation takes place in the transmitter tion pair SXl, SX2 by a transformer T, which usually has a transmission ratio 2: 1 from the device side to the interface side.
- a potential separation takes place in the receiver line pair SRI, SR2 in that a capacitor C1, C2 is connected in each line.
- the infeed points of the remote supply voltage are labeled U.
- an inductor L1, L2, L3, L4 with a common core is connected on the interface side. It also ensures lightning protection of the components on the device side.
- the transmitter line pair SX1, SX2 and the receiver line pair SRI, SR2 each have on the device side of the potential isolation line overvoltage protection circuits S1, S2, each consisting essentially of a diode network, which are known per se.
- the line ends of the receiver line pair SR2, SR2 are connected to the inputs of a voltage amplifier OP, which preferably has the same voltage amplification ratio as the transformer T.
- the amplification of the voltage amplifier OP is 2: 1 generates a minimum input level to prevent the input level on the receiver line pair SR2, SR2 from falling below a certain threshold, which can lead to transmission errors.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98910597A EP0916232A2 (de) | 1997-03-10 | 1998-02-10 | S o-SCHNITTSTELLE FÜR EINEN ISDN-BASISANSCHLUSS |
JP10539049A JP2000505276A (ja) | 1997-03-10 | 1998-02-10 | Isdn基本接続端子に対するs▲下0▼インターフェイス |
US09/189,252 US6370150B1 (en) | 1997-03-10 | 1998-11-10 | S0-interface for an ISDN base connection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19709710.3 | 1997-03-10 | ||
DE19709710A DE19709710C1 (de) | 1997-03-10 | 1997-03-10 | So-Schnittstelle für einen ISDN-Basisanschluß |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/189,252 Continuation US6370150B1 (en) | 1997-03-10 | 1998-11-10 | S0-interface for an ISDN base connection |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998041051A2 true WO1998041051A2 (de) | 1998-09-17 |
WO1998041051A3 WO1998041051A3 (de) | 1998-12-23 |
Family
ID=7822786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000369 WO1998041051A2 (de) | 1997-03-10 | 1998-02-10 | So-SCHNITTSTELLE FÜR EINEN ISDN-BASISANSCHLUSS |
Country Status (5)
Country | Link |
---|---|
US (1) | US6370150B1 (de) |
EP (1) | EP0916232A2 (de) |
JP (1) | JP2000505276A (de) |
DE (1) | DE19709710C1 (de) |
WO (1) | WO1998041051A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6584079B1 (en) * | 1999-04-15 | 2003-06-24 | Advanced Micro Devices, Inc. | Apparatus and method of implementing a home network by filtering ISDN-based signals within the customer premises |
DE102004004487A1 (de) * | 2004-01-26 | 2005-08-18 | Siemens Ag | Anordnung zur übertragerlosen elektronischen Stromeinspeisung in die Signalleitungen eines lokalen Netzes |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4423333C1 (de) * | 1994-06-21 | 1995-08-31 | Siemens Ag | Meßeinrichtung für die U-Schnittstelle einer ISDN(Integrated Services Digital Network)-Übertragungsstrecke |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3316470A1 (de) * | 1983-05-05 | 1984-11-08 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung fuer ein teilnehmeranschluss in einem diensteintegrierenden digitalnetz (isdn) |
NL8601331A (nl) * | 1986-05-26 | 1987-12-16 | At & T & Philips Telecomm | Zender voor isdn s-bus koppelvlakcircuit. |
FR2620291B1 (fr) * | 1987-09-09 | 1989-11-24 | Telephonie Ind Commerciale | Systeme et dispositif de protection et de telealimentation pour equipement connecte par deux transformateurs a une liaison de transmission a quatre fils |
FR2651398B1 (fr) * | 1989-08-31 | 1995-08-25 | Alcatel Business Systems | Agencement d'alimentation pour terminal telephonique et/ou telematique. |
SE466178B (sv) * | 1990-05-07 | 1992-01-07 | Ericsson Telefon Ab L M | Oeverspaennings- och oeverstroemsskydd foer ett linjeoeverdrag |
DE4233682A1 (de) * | 1992-10-02 | 1994-04-07 | Deutsche Telephonwerk Kabel | Schaltungsanordnung für die Speisung von digitalen Einrichtungen |
DE9214142U1 (de) * | 1992-10-20 | 1993-04-15 | Siemens AG, 80333 München | Bauelement mit Übertragerfunktion zur Bestückung von Leiterplatten |
US5526416A (en) * | 1992-11-16 | 1996-06-11 | Dezonno; Anthony J. | Automatic call distribution system with an ISDN compatible call connection system and method |
JP2898165B2 (ja) * | 1993-04-16 | 1999-05-31 | シャープ株式会社 | ハイブリッド回路 |
KR960011131B1 (ko) * | 1993-05-20 | 1996-08-20 | 현대전자산업 주식회사 | 망종단 장치 |
-
1997
- 1997-03-10 DE DE19709710A patent/DE19709710C1/de not_active Expired - Fee Related
-
1998
- 1998-02-10 EP EP98910597A patent/EP0916232A2/de not_active Withdrawn
- 1998-02-10 WO PCT/DE1998/000369 patent/WO1998041051A2/de not_active Application Discontinuation
- 1998-02-10 JP JP10539049A patent/JP2000505276A/ja active Pending
- 1998-11-10 US US09/189,252 patent/US6370150B1/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4423333C1 (de) * | 1994-06-21 | 1995-08-31 | Siemens Ag | Meßeinrichtung für die U-Schnittstelle einer ISDN(Integrated Services Digital Network)-Übertragungsstrecke |
Non-Patent Citations (2)
Title |
---|
NAKANO S ET AL: "DESIGN AND ELECTRICAL CHARACTERISTIC EVALUATION FOR INTERFACE CIRCUIT IN ISDN BUS WIRING SYSTEM" ELECTRONICS & COMMUNICATIONS IN JAPAN, PART 1 - COMMUNICATIONS, Bd. 73, Nr. 12, 1. Dezember 1990, Seiten 9-20, XP000229977 * |
See also references of EP0916232A2 * |
Also Published As
Publication number | Publication date |
---|---|
US6370150B1 (en) | 2002-04-09 |
WO1998041051A3 (de) | 1998-12-23 |
JP2000505276A (ja) | 2000-04-25 |
DE19709710C1 (de) | 1998-10-01 |
EP0916232A2 (de) | 1999-05-19 |
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