In this article I am going to further explore the M-CMTS in order to describe two import elements of DOCSIS 3.0 network, the edge-Quadrature Amplitude Modulator or EQAM and the DOCSIS Timing Interface Specification Server or DOCSIS Timing Server. Before I cover these components I will show how they are integrated with the M-CMTS architecture.
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Before we dive into bits, bytes and protocol, first we will discus some hardware. During the evolution of DOCSIS 3.0 there were a number of interesting interim steps along the way, shall we say building blocks, to arrive at a full blown D3.0 CMTSs. This left us with two fundamentally different system architectures in production by CMTS vendors, Integrated and Modular CMTSs. It is important to understand these “architectures” from a purchasing, operational and deployment standpoint as they have different requirements in some cases, some are better than others depending on the system layout.
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