ATIS 1000615.2014 (R2019)
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Digital Subscriber Signaling System No. 1 (DSS1) – Layer 3 Overview
The Digital Subscriber Signalling System No.1 (DSS1) is a suite of protocols that provides the means for users to invoke the full range of services and capabilities available from the Integrated Services Digital Network (ISDN). Formerly known as T1.615-1992(R2009).
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