Arrangement of local area network
View Patent ↗This invention relates to LANs at a customers' premise, especially to the HomePNA technique. The idea of the invention is that voice band terminals and HomePNA (HPNA) stations are hidden from a distribution network by a band division filter in a way that performance of ADSL is not degraded by presence of an HPNA LAN. The band division filter incorporates two subfilters: a POTS filter and an HPNA filter. The latter implements a band stop function maximizing insertion loss at the ADSL band The band division filter can be installed to needed telephone sockets.
1. An arrangement of a local area network in a customer's premise comprising a gateway through which the local area network is connected to an outside network via an xDSL subscriber line, in which local area network band division filters are connected to sockets of the local area network for separating voice band signals and traffic of the local area network both the voice band signals and the traffic distributed by the local area network, and for connecting voice band terminals and network stations to the local area network,
wherein the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network, and
wherein the band stop filter comprises a transformer between wires of a pair line coming from the local area network, and a resistor and capacitor connected to one of said wires parallel with a first winding of the transformer, and furthermore another resistor and capacitor connected to the other wire parallel with a second winding of the transformer, said components forming a filtering element and connecting the network station to the local area network.
2. An arrangement according to claim 1 , wherein at least two filtering elements are connected in series.
3. An arrangement according to claim 2 , wherein the arrangement further comprises at least one transversal element between the lines.
4. An arrangement according to claim 1 , wherein the filtering element further comprises a transversal element between the lines.
5. An arrangement according to claim 1 , wherein the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network.
6. An arrangement of a local area network in a customer's premise comprising a gateway through which the local area network is connected to an outside network via an xDSL subscriber line, in which local area network band division filters are connected to sockets of the local area network for separating voice band signals and traffic of the local area network both the voice band signals and the traffic distributed by the local area network, and for connecting voice band terminals and network stations to the local area network,
wherein transmission lines of the local area network are formed from telephone lines in the customer's premise,
the local area network is a Home PNA network, and
the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network, and
wherein the band stop filter comprises a transformer between wires of a pair line coming from the local area network, and a resistor and capacitor connected to one of said wires parallel with a first winding of the transformer, and furthermore another resistor and capacitor connected to the other wire parallel with a second winding of the transformer, said components forming a filtering element and connecting the network station to the local area network.
7. An arrangement according to claim 6 , wherein at least two filtering elements are connected in series.
8. An arrangement according to claim 7 , wherein the arrangement further comprises at least one transversal element between the lines.
9. An arrangement according to claim 6 , wherein the filtering element further comprises a transversal element between the lines.
10. An arrangement according to claim 6 , wherein the band division filter comprises two partes, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network.
11. An arrangement of a local area network in a customer's premise comprising a gateway through which the local area network is connected to an outside network via an xDSL subscriber line, in which local area network band division filters are connected to sockets of the local area network for separating voice band signals and traffic of the local area network both the voice band signals and the traffic distributed by the local area network, and for connecting voice band terminals and network stations to the local area network,
wherein transmission lines of the local area network are formed from telephone lines in the customer's premise, the xDSL subscriber line is an ADSL line, and the gateway is an ADSL terminal,
wherein the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network, and
wherein the band stop filter comprises a transformer between wires of a pair line coming from the local area network, and a resistor and capacitor connected to one of said wires parallel with a first winding of the transformer, and furthermore another resistor and capacitor connected to the other wire parallel with a second winding of the transformer, said components forming a filtering element and connecting the network station to the local area.
12. An arrangement according to claim 11 , wherein at least two filtering elements are connected in series.
13. An arrangement according to claim 12 , wherein the arrangement further comprises at least one transversal element between the lines.
14. An arrangement according to claim 11 , wherein the filtering element further comprises a transversal element between the lines.
15. An arrangement according to claim 11 , wherein the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network.
16. An arrangement of a local area network in a customer's premise comprising a gateway through which the local area network is connected to an outside network via an xDSL subscriber line, in which local area network band division filters are connected to sockets of the local area network for separating voice band signals and traffic of the local area network both the voice band signals and the traffic distributed by the local area network, and for connecting voice band terminals and network stations to the local area network,
wherein transmission lines of the local area network are formed from telephone lines in the customer's premise, the xDSL subscriber line is an ADSL line, the gateway is an ADSL terminal, the local area network is a HomePNA network,
wherein the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network, and
wherein the band stop filter comprises a transformer between wires of a pair line coming from the local area network, and a resistor and capacitor connected to one of said wires parallel with a first winding of the transformer, and furthermore another resistor and capacitor connected to the other wire parallel with a second winding of the transformer, said components forming a filtering element and connecting the network station to the local area network.
17. An arrangement according to claim 16 , wherein at least two filtering elements are connected in series.
18. An arrangement according to claim 17 , wherein the arrangement further comprises at least one transversal element between the lines.
19. An arrangement according to claim 16 , wherein the filtering element further comprises a transversal element the lines.
20. A band division filter for a local area network in a customer's premise wherein the filter is connected to a socket of the local area network for separating voice band signals and traffic of the local area network both the voice band signals and the traffic distributed by the local area network, and for connecting voice band terminals and network stations to the local area network,
wherein the band division filter comprises two parts, the first part being formed from a low-pass filter between the voice band terminal and the local area network, and the second part being formed from a band stop filter between the network station and the local area network, and
wherein the band stop filter comprises a transformer between wires of a pair line coming from the local area network, and a resistor and capacitor connected to one of said lines parallel with a first winding of the transformer, and furthermore another resistor and capacitor connected to the other line parallel with a second winding of the transformer, said components forming a filtering element and connecting the network station to the local area network.
21. A filter according to claim 20 , wherein at least two filtering elements are connected in series.
22. A filter according to claim 21 , wherein the filter further comprises at least one transversal element between the lines.
23. A filter according to claim 20 , wherein the filtering element further comprises a transversal element between the lines.