Digium TE436 Four Span Digital T1/E1/J1/PRI PCI 3.3V/5.0V Card and Hardware Echo Cancellation VPM128 (1TE436BF)
Digium TE436 Four Span Digital T1/E1/J1/PRI PCI 3.3V/5.0V Card and Hardware Echo Cancellation VPM128 (1TE436BF). Find out more at voip.com.vn