Routing in the PSTN (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Routing in the PSTN" in English language version.

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cam.ac.uk

statslab.cam.ac.uk

espacenet.com

worldwide.espacenet.com

  • US patent 4862496A, Francis P. Kelly, Richard J. Gibbens, Peter B. Key, Paul A. Turton, Roger R. Stacey, Martin J. Whitehead, "Routing of network traffic", issued 29 August 1989 

jsonline.com

  • Bentley, Drake (March 12, 2021). "Wisconsin residents will soon be required to dial the area code in order to make local calls". Milwaukee Journal Sentinel. Retrieved March 14, 2021.

maths.org

plus.maths.org

nationalnanpa.com

patents.google.com