video signals are to be 20 combined for 8-bit PCM system with 1200 voice messages of range of (6 to 8) kHz and. Find the commutators speed to support required TDM multiplex of these two types' .signals and bandwidth rb1 = 39.4 Mbps, rb2-807.4 Mbps, BW=3.4 MHz. rb1 = 41.4 Mbps, rb2-809.4 Mbps, BW=5.4 MHz. rb1 = 43.4 Mbps, rb2-811.4 Mbps, BW=7.4 MHz. rb1 = 44.4 Mbps, rb2=812.4 Mbps, BW-8.4 MHz. rb1 = 42.4 Mbps, rb2-810.4 Mbps, BW=6.4 MHz. rb1 = 38.4 Mbps, rb2-806.4 Mbps, BW=2.4 MHz. rb1 = 40.4 Mbps, rb2-808.4 Mbps, BW=4.4 MHz. O O O O O O