System for allowing a single device to share multiple transmission lines
View Patent ↗A front end, such as can be used in a Home Phoneline Networking Alliance network, may connected to a plurality of transmission lines. Each of the plurality of transmission lines may connected to one or more devices, such as a plain old telephone service device or an asynchronous digital subscriber line device. Devices connected to different transmission lines may then communicate with each other over the Home Phoneline Networking Alliance network.
1. A system for connecting devices via multiple transmission lines, the system comprising:
a front end of a home networking device, wherein the front end includes a filter without a blocking capacitance;
a first transmission line connected to the front end via a first blocking capacitance, wherein the first blocking capacitance is external to the front end;
a first user device connected to the first transmission line;
a second transmission line connected to the front end via a second blocking capacitance, wherein the second blocking capacitance is external to the front end; and
a second user device connected to the second transmission line.
2. The system of claim 1 , further comprising:
a first subscriber line interface circuit connected to the first transmission line; and
a second subscriber line interface circuit connected to the second transmission line.
3. The system of claim 2 , wherein the first subscriber line interface circuit connects to the first transmission line through at least a first inductor, and wherein the second subscriber line interface circuit connects to the second transmission line through at least a second inductor.
4. The system of claim 1 , further comprising:
a subscriber line interface circuit connected to the first transmission line; and
a network interface device connected to the second transmission line.
5. The system of claim 4 , wherein the subscriber line interface circuit connects to the first transmission line through at least one inductor.
6. The system of claim 1 , wherein the first user device is a plain old telephone service device, and wherein the second user device is a plain old telephone service device.
7. The system of claim 1 , wherein the first user device is a plain old telephone service device, and wherein the second user device is an asynchronous digital subscriber line device.
8. The system of claim 1 , wherein the first and second transmission lines are twisted-pair transmission lines, wherein the first blocking capacitance comprises a first capacitor and a second capacitor, and wherein the second blocking capacitance comprises a third capacitor and a fourth capacitor.
9. The system of claim 8 , wherein the first, second, third and fourth capacitors have capacitances of approximately 3300 pF.
10. The system of claim 8 , wherein the first, second, third and fourth capacitors have capacitances of approximately 2200 pF.
11. The system of claim 1 , wherein the first user device connects to the first transmission line through at least one connector, and wherein the second user device connects to the second transmission line through at least one other connector.
12. The system of claim 1 , wherein the first user device and the second user device communicate using a Home Phoneline Networking Alliance network.
13. The system of claim 1 , wherein the first user device and the second user device communicate using a Homeplug network.
14. A system of connecting multiple transmission lines in a Home Phoneline Networking Alliance network, the system comprising:
a front end of a Home Phoneline Networking Alliance device, wherein the front end provides connectivity to a Home Phoneline Networking Alliance network, and wherein the front end includes a filter without a blocking capacitance;
a first transmission line, wherein the first transmission line connects to the front end via a first blocking capacitance, wherein the first blocking capacitance is external to the front end, wherein the first transmission line connects to a first user device, and wherein the first transmission line is a twisted-pair transmission line; and
a second transmission line, wherein the second transmission line connects to the front end via a second blocking capacitance, wherein the second blocking capacitance is external to the front end, wherein the second transmission line connects to a second user device, and wherein the second transmission line is a twisted-pair transmission line.
15. The system of claim 14 , further comprising:
a first subscriber line interface circuit connected to the first transmission line; and
a second subscriber line interface circuit connected to the second transmission line.
16. The system of claim 14 , wherein the first subscriber line interface circuit connects to the first transmission line through at least a first inductor, and wherein the second subscriber line interface circuit connects to the second transmission line through at least a second inductor.
17. The system of claim 14 , further comprising:
a subscriber line interface circuit connected to the first transmission line; and
a network interface device connected to the second transmission line.
18. The system of claim 17 , wherein the subscriber line interface circuit connects to the first transmission line through at least one inductor.
19. The system of claim 14 , wherein the first user device is a plain old telephone service device, and wherein the second user device is a plain old telephone service device.
20. The system of claim 14 , wherein the first user device is a plain old telephone service device, and wherein the second user device is an asynchronous digital subscriber line device.
21. The system of claim 14 , wherein the first blocking capacitance comprises a first capacitor and a second capacitor, and wherein the second blocking capacitance comprises a third capacitor and a fourth capacitor.
22. The system of claim 21 , wherein the first, second, third and fourth capacitors have capacitances of approximately 3300 pF.
23. The system of claim 21 , wherein the first, second, third and fourth capacitors have capacitances of approximately 2200 pF.