2. a) Suppose, Grameenphone has 8 voice channels, each of 60MBps. They use synchronous TDM to multiplex these channels. If two characters at a time are multiplexed (two characters in each output slot), [10] I. II. III. IV. V. VI. VII. VIII. Draw the first two output frames with arbitrary inputs. What is the size of an output frame in bits? What is the output frame rate? What is the duration of an output frame? What is the output data rate? Input bit duration? Output bit duration? Output slot duration? b) Represent the contents of the five output frames for a synchronous TDM multiplexer that combines four sources sending the following characters. Note [5] that the characters are sent in the same order that they are typed. The third source is silent Source 1 message: YOU Source 2 message: WILL Source 3 message: Source 4 message: GET Source 5 message: CAUGHT