The Sangoma A102 supports up to 60 voice calls or 4.096 Mbps of full-duplex data throughput over two T1, E1, or J1 lines. Take advantage of hardware and software improvements, as soon as they become available. Like all cards in Sangoma's AFT family, the Sangoma A102 is field upgradable with crash-proof firmware. Choose the Sangoma A102D and A102DE cards with Octasic's DSP hardware and certified algorithms to achieve carrier-grade echo cancellation and Voice Quality Enhancement functions on your open source or even proprietary telephone system.