00964nam 2200325 450 99628066540331620231206213959.01-5044-0282-0(CKB)3710000000589811(NjHacI)993710000000589811(EXLCZ)99371000000058981120231206d1969 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierIEEE No 305-1969 IEEE Guide for Protective Relay Applications of Audio Tones over Telephone Channels /Institute of Electrical and Electronics EngineersNew York :IEEE,1969.1 online resource (69 pages)IEEE No 305-1969TelephoneTelephone.621.385NjHacINjHaclDOCUMENT996280665403316IEEE No 305-19693646854UNISA