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Making The Move From PSTN To SIP Trunk: SIP Trunking Explained
			Making the move from PSTN to SIP Trunk: SIP Trunking explained The trusted old Public Switched Telephone Network (PSTN), with its Analog lines, ISDN BRI, PRI, E1 or t1 lines, are gradually being replaced by IP telephony. An increasing number...
		
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