[Freeswitch-users] A few interesting historical links for telephony folks

[William King]

Analysis of the modem tones:
http://i.imgur.com/5Dq6K2U.png
http://www.youtube.com/watch?v=vvr9AMWEU-c

Historical telephony switching:
http://www.youtube.com/watch?v=xZePwin92cI
-- 
William King
Senior Engineer
Quentus Technologies, INC
1037 NE 65th St Suite 273
Seattle, WA 98115
Main:   (877) 211-9337
Office: (206) 388-4772
Cell:   (253) 686-5518
william.king at quentustech.com