Digium te420 four 4 span digital t1e1j1pri pci express x1 card and hardware echo cancellation
Digiums te420 pci express card provides termination of up to 120 channels of voice or data across four e1 t1 or j1 interfaces in a pcie x1 form factor selectable on a per port or per card basis the te420 allows e1 and
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