Claims
- 1. A telecom test device for connecting to a telephone line carrying an information stream, the device comprising:
a measurement system connected to the device, wherein the measurement system can make a determination of a minimum period from the information stream; a first circuit for determining a transmission technology from the minimum period; and a second circuit for selectively connecting the device to the telephone line in response to the determination of the transmission technology.
- 2. The test device of claim 1 wherein first and second circuits include portions of a programmed microcontroller.
- 3. The test device of claim 1 further comprising:
means for externally indicating a type of information stream.
- 4. The test device of claim 1 wherein the measurement system includes a register for taking a digital snapshot of the information stream.
- 5. The test device of claim 1 wherein the second circuit selectively prevents data of only a predetermined data rate.
- 6. The test device of claim 3 further comprising:
an audio output device for externally indicating the transmission technology.
- 7. The test device of claim 3 further comprising:
a visual output device for externally indicating the transmission technology.
- 8. The test device of claim 3 further comprising:
a digital output device for externally indicating the transmission technology.
- 9. The test device of claim 1 further comprising:
a manual override for temporarily disabling the second circuit.
- 10. A software program for use by a telephone test device for connecting to a telephone line carrying an information stream, the device including a measurement system for making a determination of a minimum period from the information stream, the software program comprising instructions for:
converting the minimum period into a transmission rate measurement; determining a transmission technology from the transmission rate measurement; comparing the transmission technology with a set of rules; selectively connecting the analysis device to the telephone line according to the rules.
- 11. The software program of claim 10 further comprising instructions for:
externally indicating the transmission type.
- 12. A method for determining a data transmission technology on a transmission medium, the method comprising:
receiving a high-rate synchronization signal for providing a plurality of period increments, the high-rate being greater than or equal to a minimum pulse for data on the transmission medium; counting the period increments from the high-rate synchronization signal during a pulse of data on the transmission medium; determining the data transmission technology from the counted period increments.
- 13. The method of claim 12 further comprising:
counting the period increments from the high-rate synchronization signal during another pulse of data on the transmission medium; and comparing the period increments counted from both pulses of data on the transmission medium to determine a minimum period increment.
- 14. The method of claim 13 wherein the two pulses occur in a single period.
- 15. The method of claim 13 wherein the two pulses are of the same polarity (positive or negative) in two consecutive periods.
- 16. The method of claim 12 further comprising:
providing an indication of the transmission technology to a telecom test set.
- 17. The method of claim 12 wherein the period increments are determined by a transition in the high-rate synchronization signal.
- 18. The method of claim 12 wherein the period increments indicate a positive transition in the high-rate synchronization signal.
- 19. The method of claim 12 further comprising:
counting the period increments from the high-rate synchronization signal during another pulse of data on the transmission medium; and determining the data transmission technology from the counted period increments from both pulses.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional Patent Application Serial No. 60/270,499, filed on Feb. 21, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60270499 |
Feb 2001 |
US |