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Allo E1/T1 PRI Card Quick Installation Guide
8 port -Connection Diagram
1.4 Slot Compatibility
Check your motherboard to verify that a compatible slot is available for an Allo digital E1/T1 card.
To determine which slots you have on your motherboard.
Motherboard slots
The Digital E1/T1 cards work with PCIe slot like x1, x2, x4, x8 and x16.