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19 January 2018
- (diff | hist) . . Automatic number announcement circuit; 17:26 . . (-8) . . 220.127.116.11 (→External links: Fixed moved link)
17 January 2018
- (diff | hist) . . Dual-tone multi-frequency signaling; 16:32 . . (-346) . . Kbrose (rv, poor prose, no context, factually challanged)
- (diff | hist) . . m Dual-tone multi-frequency signaling; 05:07 . . (+58) . . Hefangdotcom (→Encode/Decoding within IP networks) (Tag: Visual edit)
- (diff | hist) . . m Dual-tone multi-frequency signaling; 04:56 . . (+288) . . Hefangdotcom (Adding technology advancement in use in DTMF applications.) (Tag: Visual edit)