1. A method for providing a country code identifier in an international E.164 number mapping (ENUM) system, the method comprising:
at an ENUM server comprising a communication interface and a memory:
utilizing the communication interface to receive, from a media gateway controller, a message including an E.164 telephone number and information associated with a country of origin of the E.164 telephone number, wherein the information associated with the country of origin of the E.164 telephone number comprises an Internet protocol (IP) address associated with the media gateway controller, wherein the E.164 telephone number included in the message received from the media gateway controller lacks a country code identifier;
utilizing information stored in the memory to determine the country code identifier for the E.164 telephone number based on the information associated with the country of origin of the E.164 telephone number, wherein the country code identifier is determined based on the IP address associated with the media gateway controller;
appending the country code identifier to the E.164 telephone number of the received message to generate a full E.164 telephone number; and
utilizing the full E.164 telephone number to perform ENUM processing.
2. The method of claim 1 wherein receiving a message includes receiving an ENUM query.
3. The method of claim 1 wherein appending the country code identifier to the E.164 telephone number of the received message includes appending the country code identifier to the E.164 telephone number in the received message, and wherein the method comprises forwarding the message to a predetermined ENUM server based on the country code identifier.
4. The method of claim 1 comprising forwarding the message to one of a plurality of country-specific ENUM databases based on the determined country code identifier.
5. The method of claim 4 comprising performing ENUM processing at the one of the plurality of country-specific ENUM databases.
6. The method of claim 1 comprising performing ENUM processing based on the E.164 telephone number having the appended country code identifier.
7. A method for E.164 number mapping (ENUM) processing in an international ENUM system, the method comprising:
at an ENUM server comprising a communication interface and a memory:
utilizing the communication interface to receive, from a media gateway controller, a message including an E.164 telephone number and information associated with a country of origin of the E.164 telephone number, wherein the information associated with the country of origin of the E.164 telephone number comprises an Internet protocol (IP) address associated with the media gateway controller, wherein the E.164 telephone number included in the message received from the media gateway controller lacks a country code identifier;
utilizing information stored in the memory to determine an ENUM processing action based on the information associated with the country of origin of the E.164 telephone number, wherein the ENUM processing action is determined based on the IP address associated with the media gateway controller; and
performing the ENUM processing action based on the information associated with the country of origin of the E.164 telephone number.
8. The method of claim 7 wherein receiving a message includes receiving an ENUM query.
9. The method of claim 7 wherein performing the ENUM processing action includes forwarding the message to one of a plurality of country-specific ENUM databases based on the information associated with a country of origin of the E.164 telephone number.
10. The method of claim 9 comprising performing ENUM processing at the one of the plurality of country-specific ENUM databases.
11. The method of claim 10 wherein accessing or pointing to a database includes pointing to an ENUM database.
12. The method of claim 9 comprising removing a country code prefix in the E.164 telephone number.
13. The method of claim 7 wherein performing the ENUM processing action includes accessing or pointing to a database based on the information associated with a country of origin of the E.164 telephone number.
14. A system for providing a country code identifier in an international E.164 number mapping (ENUM) system, the system comprising:
a communications module configured to receive, from a media gateway controller, a message including an E.164 telephone number and information associated with a country of origin of the E.164 telephone number, wherein the information associated with the country of origin of the E.164 telephone number comprises an Internet protocol (IP) address associated with the media gateway controller, wherein the E.164 telephone number included in the message received from the media gateway controller lacks a country code identifier; and
an ENUM country code function configured to determine a country code identifier for the E.164 telephone number based on the information associated with the country of origin of the E.164 telephone number and configured to append the country code identifier to the E.164 telephone number of the received message, wherein the ENUM country code function is configured to determine the country code identifier based on the IP address associated with the media gateway controller.
15. The system of claim 14 wherein the communications module is configured to receive an ENUM query.
16. The system of claim 14 wherein the ENUM country code function is configured to append the country code identifier to the E.164 telephone number in the received message and configured to forward the message to a predetermined ENUM server based on the country code identifier.
17. The system of claim 14 wherein the ENUM country code function is configured to forward the message to one of a plurality of country-specific ENUM databases based on the determined country code identifier.
18. The system of claim 17 comprising an ENUM server configured to perform ENUM processing in association with the one of the plurality of country-specific ENUM databases.
19. The system of claim 14 comprising an ENUM server configured to perform ENUM processing based on the E.164 telephone number having the appended country code identifier.
20. A system for E.164 number mapping (ENUM) processing in an international ENUM system, the system comprising:
a communications module configured to receive, from a media gateway controller, a message including an E.164 telephone number and information associated with a country of origin of the E.164 telephone number, wherein the information associated with the country of origin of the E.164 telephone number comprises an Internet protocol (IP) address associated with the media gateway controller, wherein the E.164 telephone number included in the message received from the media gateway controller lacks a country code identifier; and
an ENUM function configured to determine an ENUM processing action based on the information associated with the country of origin of the E.164 telephone number and configured to perform the ENUM processing action based on the information associated with the country of origin of the E.164 telephone number, wherein the ENUM function is configured to determine the ENUM processing action based on the IP address associated with the media gateway controller.
21. The system of claim 20 wherein the communications module is configured to receive an ENUM query.
22. The system of claim 20 wherein the ENUM function is configured to forward the message to one of a plurality of country-specific ENUM databases based on the determined country code identifier.
23. The system of claim 20 wherein the ENUM function is configured to access or point to a database based on the information associated with a country of origin of the E.164 telephone number.
24. The system of claim 23 wherein the ENUM function is configured to point to an ENUM database based on the information associated with a country of origin of the E.164 telephone number.
25. A computer program product comprising computer executable instructions embodied in a non-transitory computer readable medium for performing steps comprising:
at an E.164 number mapping (ENUM) server comprising a communication interface and a memory:
receiving, from a media gateway controller, a message including an E.164 telephone number and information associated with a country of origin of the E.164 telephone number, wherein the information associated with the country of origin of the E.164 telephone number comprises an Internet protocol (IP) address associated with the media gateway controller, wherein the E.164 telephone number included in the message received from the media gateway controller lacks a country code identifier;
determining an E.164 number mapping (ENUM) processing action based on the information associated with the country of origin of the E.164 telephone number, wherein determining the ENUM processing action is based on the IP address associated with the media gateway controller; and
performing the ENUM processing action based on the information associated with the country of origin of the E.164 telephone number.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A variable vacuum capacitor comprising:
a vacuum enclosure,
a first variable electrode assembly comprising one or mote first static electrodes and one or more first mobile electrodes,
a second variable electrode assembly comprising one or more second static electrodes and one or more second mobile electrodes,
a first electrical connection terminal for providing an electrical connection to the one or more first static capacitor electrodes,
a second electrical connection terminal for providing an electrical connection to the one or more second static capacitor electrodes,
displacement means for displacing the first andor second mobile electrodes relative to the first andor second static electrodes respectively, along an axis of the vacuum capacitor,
wherein the variable vacuum capacitor,
the first and second electrode assemblies are ganged along the axis such that the first mobile electrode assembly is offset along the axis by a gang offset distance from the second electrode assembly, and
the variable vacuum capacitor comprises mobile electrode linkage means for providing a kinematic linkage between the one or more first mobile electrodes at a first position along the axis and the one or more second mobile electrodes at a second position along the axis, such that a first displacement along the axis of the one or more first mobile electrodes results in a second displacement along the axis of the one or more second mobile electrodes.
2. Variable vacuum capacitor according to claim 1, wherein the mobile electrode linkage means is arranged such that the magnitude of the second displacement is the same is the magnitude of the first displacement.
3. Variable vacuum capacitor according to claim 1, wherein the mobile electrode linkage means comprises electrical connection means for electrically connecting the one or more first mobile electrodes to the one or more second mobile electrodes.
4. Variable vacuum capacitor according to claim 1, wherein the displacement means comprises a motor outside the vacuum enclosure, and drive transmission means for transmitting a drive force of the motor through a wall of the vacuum enclosure to the one or more first mobile electrodes inside the vacuum enclosure.
5. Variable vacuum capacitor according to claim 4, comprising motor protection insulation for electrically insulating the motor against a high voltage on the one or more first mobile electrodes.
6. Variable vacuum capacitor according to claim 5, wherein the motor protection insulation is arranged between the drive transmission means and the one or more first mobile electrodes.
7. Variable vacuum capacitor according to claim 1, wherein
the one or more first mobile electrodes and the one or more first static electrodes are substantially cylindrical and coaxial with the axis, such that the one or more first mobile electrodes are at least partially interleaved with the one or more first static electrodes, andor
the second mobile electrodes the one or more second static electrodes are substantially cylindrical and coaxial with the axis, such that the one or more second mobile electrodes are at least partially interleaved with the one or more second static electrodes.
8. Variable vacuum capacitor according to claim 1, wherein the one or more first mobile electrodes and the one or more first static electrodes are configured as spiral electrodes, andor wherein the one or more second mobile electrodes and the one or more second static electrodes are configured as spiral electrodes.
9. Variable capacitor according to claim 7, wherein the mobile electrode linkage means comprises a substantially cylindrical element arranged around the outside of the first electrode assembly and arranged coaxially with the one or more first mobile and one or more first static electrodes.
10. Variable capacitor according to claim 9, wherein the substantially cylindrical element is at least partially constructed from an electrode material and is arranged sufficiently close to an outer one of the one or more first static electrodes to function at least partially as one of the one or more first mobile electrodes.
11. Variable capacitor according to claim 9, wherein the substantially cylindrical element comprises open regions, and wherein one or more static electrode support elements extend from the first static electrodes, through the openings, to the wall of the vacuum enclosure.
12. Variable vacuum capacitor according to claim 1, comprising insulating parts made at least partially of a ceramic material.
13. Variable vacuum capacitor according to claim 1, comprising extensible vacuum sealing means extending between the first electrode assembly and the wall of the vacuum enclosure, the extensible vacuum sealing means being constructed with such a shape and of such materials that it behaves as an electrical insulator, at least when the variable vacuum capacitor is operating at a high voltage andor at a high frequency.
14. Variable vacuum capacitor according to claim 1, wherein the one or more first static and the one or more first mobile electrodes have substantially the same dimensions and spatial configuration as the one or more second static and the one or more second mobile electrodes respectively.