DS21Q348 interface equivalent, 3.3v e1/t1/j1 line interface.
Complete E1, T1, or J1 Line Interface Unit (LIU) Supports Both Long-Haul And Short-Haul Trunks Internal Software-Selectable Receive-Side Termination for 75Ω/100Ω/120Ω 3.3.
Throughout the data sheet, J1 is represented wherever T1 exists. Receive sensitivity adjusts automatically to the incom.
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