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What is the difference between T1 and E1?

April 26, 2017e1 T1

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What is the difference between T1 and E1?

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A2. The main differences between T1 and E1 are the operating frequency, the number of time slots, the pulse shape, the characteristic line impedance, and the signaling method. The T1 system operates at 1.544MHz with a total of 24 time slots. The T1 pulse shape contains overshoot and undershoot and is driven on a line impedance of 100Ω. Finally, digital messages to signal on/off-hook or other conditions are sent using robbed-bit signaling. The E1 system operates at 2.048MHz with a total of 32 time slots. The E1 pulse shape is a perfectly rectangular pulse shape and is driven on a line impedance of 120Ω or 75Ω. Finally, digital messages to signal on-/off-hook or other conditions are sent using channel-associated signaling.