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	PSTN - Public Switched Telephone Network (Sunny Classroom) View
	Public Switched Telephone Network (PSTN) u0026 its Evolution (Dr. Moazzam Tiwana) View
	What is PSTN and How to Switch from PSTN to VoIP (United World Telecom) View
	PUBLIC SWITCHED TELEPHONE NETWORK (PSTN) (confused soul) View
	PSTN Public Switched Telephone Network (Naresh Adhikari) View
	Public Switched Telephone Network(PSTN) (Pro Computerz) View
	Public switched telephone network (Audiopedia) View
	Public switched telephone network (WikiAudio) View
	What is PSTN Replacement (Global Call Forwarding) View
	What is the PSTN Switch Off (Fibrenews) View