| 释义 |
Table D-1: Digital Hierarchy: T-Carrier, E-Carrier, and J-Carrier Signal Level Number of Data Channels Total Signaling Rate (Mbps) T-Carrier E-Carrier J-Carrier (North America) (Europe) (Japan) 0 1 0.064 0.064 0.064 1 24 1.544 1.544 30 2.048 1C 48 3.152 2 96 6.312 6.312 120 8.448 7.786 3 480 34.368 32.064 672 44.736 3C 1,344 91.053 4 1,440 97.728 1,920 139.268 4,032 274.176 5 5,760 400.352 7,680 565.148 565.148 6 30,720 2200.00 74570c04.qxd 9/11/07 12:19 PM Page 137 |