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Date: 2012-10-10 12:41:51Telephone Rotary dial Hook flash Pulse dialing Dial tone Headset Dual-tone multi-frequency signaling TRS connector GPO telephones Telephony Electronic engineering Office equipment | [removed]/05 2:22 PMAdd to Reading ListSource URL: www.ultratec.comDownload Document from Source WebsiteFile Size: 390,18 KBShare Document on Facebook |