300-070 Question #323: Real Exam Question with Answer & Explanation

The correct answer is B: 24. A T1 line contains 24 full-duplex timeslots (DS0 channels), each operating at 64 Kbps, for a total bandwidth of 1.544 Mbps. The 30-timeslot figure (option A) applies to an E1 line, which has 30 usable bearer channels plus 2 channels for framing and signaling. The 23-timeslot figu

Question

How many full duplex timeslots does a T1 line contain?

Options

Explanation

A T1 line contains 24 full-duplex timeslots (DS0 channels), each operating at 64 Kbps, for a total bandwidth of 1.544 Mbps. The 30-timeslot figure (option A) applies to an E1 line, which has 30 usable bearer channels plus 2 channels for framing and signaling. The 23-timeslot figure (option C) refers to the number of usable bearer (B) channels in a T1 PRI circuit, where one timeslot is reserved as the D channel for signaling. Option D (31) refers to the total timeslots in an E1 including the D channel and framing channel.

Community Discussion

No community discussion yet for this question.

Full 300-070 Practice