4x E1 120 channels PCIe board without hardware echo cancellation
2x E1 60 channels PCIe board without hardware echo cancellation
1x E1 30 channels PCIe board without hardware echo cancellation
A108DE - eight T1/E1 or fractional T1/E1 PCI-Express card + hardware echo cancellation
A108D - eight T1/E1 or fractional T1/E1 PCI card + hardware echo cancellation
A104DE - four T1/E1 or fractional T1/E1 PCI-Express card + hardware echo cancellation
A104D - four T1/E1 or fractional T1/E1 PCI card + hardware echo cancellation
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