I was notified from a hardware knowledgeful that some companys is
trying to build builtin telecommunication gizmo implemented on chip
die or as a chipset with the number of established local communication
device like Ethernet.  It's clear that what kind of products they are
targetting to and not a secret at all.  Now, I'm just wondering about
any recommendation of reference about DSP or top-of-the-line telephony
hardware technology to incorporate them into a product.  Guidance or
comments are welcome. 

Tohru Nishimura