Cisco PVDM2-16 16 Channel Packet Voice/FAX DSP Module
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Product review & video
as we move along in the CCNA voice video course talking about voice over IP fundamentals it's time to introduce the concept of digital signal processing and DSP modules I'll be your instructor and you know I think you're starting to understand my style by now so we'll jump right into this we're going to talk about DSPs how they're used and we're going to do a demonstration of the cisco DSP calculator so the modules that you see on the screen here our DSP is digital signal processors so what is a DSP and what do I need it for well it's a hardware device whose primary role is to convert analog signals into digital signals to do that sampling that we talked about you know back with Nyquist theorem I provide compression and encoding functions so these DSPs are the a 2d DDA converters essentially that are in your router taking care of turning that voice into packets they're installed into a
