SOFT-SWITCH.ORG

Until recently telephony cards for computers (mostly ISA, PCI and cPCI cards) were generally complex devices with on-board DSP hardware. Dialogic, Natural Microsystems, Pika and others have been making products of this kind since the 1980s. Slow host CPUs and approvals issues made alternatives unworkable. Now we have very fast host CPUs, and the approvals requirements in some places are less problematic than they used to be. The time for dumb telephony cards, and smart host software has come... Since this work began, the power of host processors has continued to improve, and the idea of DSP on the host CPU has now become firmly established. Several commercial vendors now provide solutions of this type, typically using the term "host media processing"... soft-switch.org provides DSP and signaling modules for free telephony