System News
What is SIP Trunking and How Does It Work?
Business 2 Community, July 11th 2017
July 11, 2017,
Volume 233, Issue 2

"By 2018, American telco Verizon will have ceased its ISDN services - a platform for voice, video, and data exchange introduced in the '80s by the CCITT - in the entire country; in the United Kingdom alone, ISDN lines have seen a decrease of 3 million from a statistical high of 4.7 million back in 2007..."

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