<page_title> Digital Signal 1 </page_title> <section_title> Overview </section_title> <table> <cell> 1.544 Mbit/s <col_header> Line rate </col_header> </cell> <cell> T1 <col_header> Line </col_header> </cell> </table>
T1's data transmission rate is 1.544 megabits per second.