Digital Exchange and VOIP

REFERENCES

[1]MT8981D Datsheet
http://www.datasheetcatalog.com/datasheets_pdf/M/T/8/9/MT8981.shtml

[2]Ag1170 Datasheet
http://www.alldatasheet.com/datasheet-pdf/pdf/169921/ETC/AG1170.html

[3]8051 Datasheet
http://www.datasheetcatalog.com/datasheets_pdf/8/0/5/1/8051.shtml

[4] TP3054B Datasheet
http://www.alldatasheet.co.kr/datasheet-pdf/pdf_kor/29086/TI/TP3054B.html

[5]Digital Exchange and Eurotel Limited
http://www.blogger.com/www.digital-exchange.com

[6]F. J. Redmill, A. R. Valdar, A.R Valdar, “Digital Telephone Exchanges” (Hardcover)
Institution of Electrical Engineers; Revised edition (February 1999), pp. 15-60.

[7] Francis, H.E. (1959), “The general plan for subscriber trunk dialing”, PO Electrical Engineers Journal, 51. pp 258-267.

[8] Clark, A.B. (1952), “Automatic switchingfor nation-wide telephone service”, Bell Systems Technical Journal, 31. pp 823-831.