WO2002073922A2

WO2002073922A2 - Terminal for ip-telephony

Info

Publication number: WO2002073922A2
Application number: PCT/DE2002/000340
Authority: WO
Inventors: Michael Winkelmann; Thomas Bebko; Wilfried Krug
Original assignee: Siemens Aktiengesellschaft
Priority date: 2001-03-13
Filing date: 2002-01-31
Publication date: 2002-09-19
Also published as: WO2002073922A3; DE10111972A1

Abstract

The invention relates to a terminal for IP-telephony (10, 10', 10''), comprising an interface (11, 11', 11'') for connecting to an existing network (20), in particular domestic cabling. In said terminal, the interface (11, 11', 11'') is configured for receiving and transmitting voice and user data between the terminals connected to the network (20).

Description

description

Terminal for IP telephony

The invention relates to a terminal for IP telephony and an arrangement for voice and user data transmission according to the preamble of claim 6.

Terminals for IP telephony are known from the prior art and are used in networks such. B. LANs (Local Area Networks), WANs (Wide Area Networks),

Dial-up (remote data transmission) networks, etc. used for voice and user data transmission (voice, streaming audio, streaming video). The functioning of IP telephony is based on the technology of the Internet protocol, a protocol of

TCP / IP family on layer 3 of the OSI reference model, in which each terminal device connected to a computer network (computer, printer, scanner, etc.) is assigned a unique address, via which the corresponding terminal device receives messages addressed to itself on the Network detects.

IP telephony in the narrower sense means that speech is transmitted from one computer equipped with a microphone and loudspeaker to another. In this solution, the computer is connected to an Internet service provider via the conventional circuit-switched public network, from where it can transmit its language in the packet-switching Internet. Terminal devices for IP telephony are also specially equipped telephones, which are operated like conventional telephones and directly via the Internet or an intranet

Can exchange voice and user data (videophone). This technology is also known as a Voice-over-IP network.

While local area networks (LAN) have become standard in office communication these days, the use of a LAN in the home is rather rare. In Germany, especially in the private sector, there are mainly conventional a / b Telephone cabling for the use of analog devices, increasingly also cabling for digital data transmission (ISDN). But this is also the use of the advantages of IP telephony, such as. B. low transmission costs, use of multimedia options, etc., very limited.

Even if a user wanted to extend a possibly existing Voice-over-IP network at home with additional end devices for IP telephony, this would mean laying additional CAT5 (Category 5) cables or other cables (e.g. fiber optics) -, plastic fiber cables, cables of higher categories) through walls and / or ceilings. Such an installation is neither cheap nor easy, but rather requires some expertise from the user.

However, if a Voice-over-IP network is to be expanded with existing end devices (IP telephones) via existing a / b telephone cabling, it is usually necessary to implement between the transmission media Ethernet / telephone line and telephone line / Ethernet. This requires a two-way conversion with two separate Ethernet / telephone line converter boxes to connect each additional IP telephone to the existing telephone network, which is correspondingly complex and expensive and entails interference with the end devices connected to the telephone cabling.

The object of the present invention is to provide a terminal for IP telephony and an arrangement for voice and user data transmission, which enables the use of an existing line network, in particular home cabling, for IP telephony simply and inexpensively.

This object is achieved by a terminal for IP telephony with the features of claim 1 and one ω ω t ⁾ P "P ¹

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In a particularly preferred manner, the arrangement has a line network consisting of a two-wire or multi-wire telephone line. This ensures that not only standard analog telephone cabling (a / b cabling) but also the more and more established four-wire cabling (ISDN) can be used by one end device for IP telephony.

If the line network of an arrangement according to the present invention has standard sockets for connecting terminals (TAE, RJ11 or RJ45 sockets), a particularly simple connection of terminals for IP telephony (IP telephones, computers) to these standard sockets is possible.

An arrangement which has a line network, a computer network and a filter connecting both networks is particularly advantageous. With the help of this filter, a computer network (LAN) around the topology of a z. B. Existing existing line network (telephone cabling) expand, so that a complex and costly installation of additional LAN cabling is not necessary. The filter connecting the two networks converts voice and user data packets between the two networks.

The computer network advantageously has a (widespread) Ethernet LAN. So stand, for. B. with 10/100 Mbit / s Ethernet transmission rates are available, which do not need to be implemented at the transition to the line network, at least at 10 Mbit / s.

The IP switching software of an arrangement according to the present invention is expediently made available on a switching computer connected to the line network or the computer network. This switching computer has an interface for connection to a local computer network or alternatively to an existing line. o co to H ¹

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trouble-free juxtaposition of old installation and new installation (IP telephony) guaranteed.

With the help of a private branch exchange for connecting the line network and the computer network to a further switching network, a further extension is preferably implemented on a single telephone line in addition to an existing installation. This makes it easy to expand an existing installation with additional end devices for IP telephony.

It is particularly advantageous if the crossovers of the arrangement for voice and user data transmission are each integrated with at least one terminal. As a result, an existing line network, such as home cabling, is installed without the additional attachment or cabling of further devices between the connections, eg. B. TAE, RJ11 or RJ45 sockets, and the end devices can be used directly.

The present invention is explained in more detail below on the basis of an exemplary embodiment and on the basis of the figures.

FIG. 1 shows (among other things) IP telephones 10, 10 ', 10' 'which are connected to a line network 20 and to a computer network 40. The same reference numbers are used below for the same or equivalent parts.

The line network 20 is connected to a computer network 40 via a filter 50. It consists of existing two-wire telephone cabling that connects end devices or groups of end devices to filter 50 via individual lines. In the line network 20, terminal devices are an (analog) telephone 32 to which, as is now common in many private installations, an answering machine 31 and a fax machine 30 are connected. The connection of a PC 33 via a modem 35 to one shown is also widespread Allow Internet access. A printer 34 is also connected to the PC 33.

The computer network 40 consists of an Ethernet LAN to which the terminals are connected in the form of a bus. Terminal devices here are a printer 36, a further PC 37, a laptop 38 and a workstation 39.

The filter 50 represents a bridge between the two networks and converts data packets containing voice and user data, which are to be transmitted in the context of IP telephony, between the two networks. The data packets are transmitted in the frequency range between 2.4 MHz and 24.5 MHz. This is the communication between the terminals for IP telephony, the IP phones 10, 10 ', 10' 'shown here with

Interfaces 11, 11 ', 11' 'for receiving and sending voice and user data in the corresponding transmission area are guaranteed across both networks. Basically, connections to other terminals for IP telephony, for example computers equipped with loudspeakers and microphones, can also be established via the IP telephones 10, 10 ', 10' '.

The provision of the transmission protocol with the help of an IP running on the switching computer 12

Mediation software takes place via an interface in the form of a plug-in card 13, which in turn is connected to the computer network 40. Alternatively, a connection to the line network 20 could of course also be provided.

The trouble-free operation in the line network 20 between terminals of the old installation, such as. B. the arrangement of analog phone 32, answering machine 31 and fax machine 30 is ensured with the help of crossovers 14, 14 '. The analog telephone 32 is connected to the line network via the crossover 14 designed as a low-pass filter and the IP telephone 10 via the crossover 14 'designed as a high-pass filter 20 coupled. The entire network 20, 40 can be operated as an extension via a private branch exchange 15 and is connected to a switching network 60 via this private branch exchange 15.

2 shows an example of a preferred construction of an IP telephone 10. The figure is self-explanatory due to the labeling and therefore does not require any additional explanation here. (The abbreviations used are familiar to the person skilled in the art, and the circuits used are commercially available.)

At this point, it should be pointed out that all the parts described above are seen on their own and in any combination, in particular the details shown in the drawing, are claimed as essential to the invention. Modifications to this are familiar to the person skilled in the art.

Claims

claims

1. Terminal for IP telephony (10, 10 ', 10 ") / with an interface (11, 11', 11") for connection to an existing line network (20), in particular home cabling, the interface (11, 11 ', 11' ') is designed for receiving and sending voice and user data between terminals connected to the line network (20).

2. The terminal as claimed in claim 1, which has the interface (11, 11 ', 11' ') for receiving and sending voice and user data at a transmission rate of up to 10 Mbit / s.

3. Terminal according to claim 1 or 2, characterized in that the interface (11, 11 ', 11' *) 'means for receiving and sending voice and user data in a frequency range, which above that of which is usually used by analog telephones and computers Frequency range is, essentially above 2.4 MHz.

4. Terminal according to claim 3, d a d u r c h g e k e n n z e i c h n e t, d a s s the means for receiving and sending voice and user data are integrated together with means for internet protocol-based voice and user data transmission on an integrated circuit.

5. Terminal according to one of the preceding claims, characterized in that the interface (11, 11 ', 11'') has means for receiving and sending voice and user data in bus operation (parallel operation).

6. Arrangement for voice and user data transmission, with at least one terminal for IP telephony (10, 10 ', 10' ') according to one of claims 1 to 4, an existing line network (20), in particular home cabling, and an IP - Mediation software.

7. Arrangement according to claim 6, because of the fact that the IP switching software is based on a transmission protocol based on the protocol stack H.323.

8. Arrangement according to claim 6 or 7, d a d u r c h g e k e n n z e i c h n e t, that the line network (20) has a two or multi-wire telephone line.

9. Arrangement according to claim 8, d a d u r c h g e k e n n z e i c h n e t, which has the line network (20) standard sockets for connecting telephony terminals.

10. Arrangement according to one of claims 6 to 9, a line network (20), a computer network (40), and a filter (50) connecting both networks.

11. The arrangement as claimed in one of claims 6 to 10, where the computer network (40) has an Ethernet LAN or FDDI, token ring or token bus or wireless LAN.

12. The arrangement according to one of claims 6 to 11, characterized in that the IP switching software runs on a switching computer (12) connected to the line network (20) or the computer network (40).

13. The arrangement as claimed in claim 12, which means that the switching computer (12) has an interface for connection to the line network (20) or the computer network (40), which is designed as a plug-in card (13).

14. Arrangement according to one of claims 6 to 13, g e k e n n z e i c h n e t d u r c h

Crossovers (14, 14 '), which each connect at least one terminal for IP telephony (10, 10', 10 '') to the line network (20).

15. The arrangement as claimed in one of claims 6 to 14, a branch exchange (15) for connecting the line network (20) and the computer network (40) to a switching network (60).

16. Arrangement according to claim 14 or 15, d a d u r c h g e k e n n z e i c h n e t, that the crossovers (14, 14 ') are each integrated with at least one terminal (10, 10', 10 '').