1. A method for monitoring a plurality of endpoints participating in a conference call via a conference bridge, the method comprising the steps of:
receiving a control signal embedded in an audio signal from the conference bridge, wherein the control signal is substantially humanly inaudible and comprises information regarding the endpoints currently participating in the conference call; and,
extracting the control signal from the audio signal.
2. The method of claim 1 wherein the control signal is received according to a communication protocol selected from the group consisting of IP, modem data, ISDN, and analog.
3. The method of claim 1 wherein the step of receiving a control signal is provided periodically.
4. The method of claim 1 wherein the step of receiving a control signal is provided in response to a request from the speakerphone.
5. The method of claim 1 wherein the step of receiving a control signal is provided upon a joining endpoint’s joining the conference call.
6. The method of claim 1 wherein the step of receiving a control signal is provided upon a leaving endpoint’s leaving the conference call.
7. A non-transitory, computer-readable medium comprising instructions for monitoring a plurality of endpoints participating in a conference call via a conference bridge by performing the steps of:
receiving a control signal embedded in an audio signal from the conference bridge, wherein the control signal is substantially humanly inaudible and comprises information regarding the endpoints currently participating in the conference call; and,
extracting the control signal from the audio signal.
8. The non-transitory, computer-readable medium of claim 7 wherein the control signal is received according to a communication protocol selected from the group consisting of IP, modem data, ISDN, and analog.
9. The non-transitory, computer-readable medium of claim 7 wherein the step of receiving a control signal is provided periodically.
10. The non-transitory, computer-readable medium of claim 7 wherein the step of receiving a control signal is provided in response to a request from the speakerphone.
11. The non-transitory, computer-readable medium of claim 7 wherein the step of receiving a control signal is provided upon a joining endpoint’s joining the conference call.
12. The non-transitory, computer-readable medium of claim 7 wherein the step of receiving a control signal is provided upon a leaving endpoint’s leaving the conference call.
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 phosphor mixture comprising a first phosphor and a second phosphor, wherein
an emission spectrum of the first phosphor has a relative intensity maximum in a yellow spectral range and an emission spectrum of the second phosphor has a relative intensity maximum in a red spectral range and emits red light having a dominant wavelength of 590 nm to 615 nm,
the first phosphor corresponds to the following chemical formula: (LuxY1\u2212x)3(Al1\u2212yGay)5O12:Ce3+, where x is greater than or equal to 0 and less than or equal to 1 and where y is greater than or equal to 0 and less than or equal to 0.4,
the second phosphor is selected from the group consisting of (Ca,Sr,Ba)2Si5N8Eu2+ and (CaxSryBa1\u2212x\u2212y)2Si5N8:Eu2+, where x is greater than or equal to 0 and less than or equal to 0.2 and y is greater than 0 and less than or equal to 0.5, (CaxSr1\u2212x)AlSi(OyN1\u221223y)3:Eu2+, where x is greater than 0.1 and less than or equal to 1 and y is greater than or equal to 0 and less than 0.1, and
the phosphor mixture is formed from a plurality of particles, which comprises a plurality of particles of the first phosphor and a plurality of particles of the second phosphor.
2. The phosphor mixture according to claim 1, wherein the first phosphor is a garnet phosphor.
3. The phosphor mixture according to claim 1, wherein the first phosphor is a cerium-doped garnet phosphor and cerium content is 0.3 mol % to 6 mol %.
4. The phosphor mixture according to claim 1, wherein the first phosphor is selected from the group consisting of Y3Al5O12:Ce3+, (Lu,Y)3Al5O12:Ce3+, Y3(Al,Ga)5O12:Ce3+and (Lu,Y)3(Al,Ga)5O12:Ce3+.
5. The phosphor mixture according to claim 4, wherein cerium content is 0.3 mol % to 6 mol % relative to a substance amount of lutetium and yttrium in moles.
6. The phosphor mixture according to claim 1, wherein the first phosphor emits yellow light having a dominant wavelength of 560 nm to 575 nm.
7. The phosphor mixture according to claim 1, wherein the second phosphor is a nitride phosphor.
8. The phosphor mixture according to claim 1, wherein the second phosphor is a europium-doped nitride phosphor and europium content is 0.5 mol % to 5 mol %.
9. The phosphor mixture according to claim 1, wherein the second phosphor is selected from the group consisting of (Ca,Sr,Ba)2Si5N8:Eu2+ and (CaxSryBa1\u2212x\u2212y) 2Si5N8:Eu2+, where x is greater than or equal to 0 and less than or equal to 0.2 and where y is greater than 0 and less than or equal to 0.5.
10. The phosphor mixture according to claim 9, wherein europium content is 0.5 mol % to 5 mol % relative to a substance amount of calcium, strontium and barium in moles.
11. The phosphor mixture according to claim 1, wherein an excitation spectrum of the first phosphor andor of the second phosphor has a relative maximum at a wavelength of greater than or equal to 444 nm in a blue spectral range.
12. The phosphor mixture according to claim 1, wherein the excitation spectrum of the first phosphor andor of the second phosphor has a relative maximum at a wavelength of 444 nm to 460 nm.
13. The phosphor mixture according to claim 1, which is free of a further wavelength-converting material.
14. An optoelectronic component comprising a semiconductor body-which emits electromagnetic radiation of a first wavelength range during operation, and a phosphor mixture according to claim 1, which converts at least part of radiation of a first wavelength range emitted by the semiconductor body into radiation of a second wavelength range different from the first wavelength range, and into radiation of a third wavelength range different from the first and second wavelength ranges.
15. The optoelectronic component according to claim 14, which emits mixed-colored light composed of radiation of the first wavelength range and radiation of the second and third wavelength ranges and having a color locus in a warm-white range of the CIE standard chromaticity diagram.
16. A street lamp comprising a semiconductor body that emits electromagnetic radiation of a first wavelength range during operation, and a phosphor mixture according to claim 1, which converts at least part of radiation of a first wavelength range emitted by the semiconductor body into radiation of a second wavelength range different from the first wavelength range, and into radiation of a third wavelength range different from the first and second wavelength ranges.