Max number of satellite hops allowed in voice communication is two hops
Word alignment is aligning the address to the next word boundary of the machine.
3. What action is taken when the processor under execution is interrupted by a non-maskable interrupt?
a) Processor serves the interrupt request after completing the execution of the current instruction.
b) Processor serves the interrupt request after completing the current task.
c) Processor serves the interrupt request immediately.
d) Processor serving the interrupt request depends upon the priority of the current task under execution.
Processor serves the interrupt request after completing the execution of the current instruction.
4. How many T1 facilities the company needs between its office and the PSTN if it has 47 digital telephones, each operating at 64kbps
3 low-speed video machines, each operating at 384kbps
1 interactive video system, requiring 1.536 mbps.
Need 4 T1's.
Each T1 can accomodate 28 channels.
► 47 digital channels
► 3 low speed V.machines at 384 kbps.
► 1 interactive video systemat 1.536mbps.
So total=47+6+24=89 channels
each T1 requires 1 synchronizing channel & 1 signalling channel.
So 4 T1 requires 8 channels.
4T1's =112 channels-96 channels=15 channels(remains free)
Software that allows a personal computer to pretend as a computer terminal is Terminal Emulation
Type of signaling used between two exchanges is inband
The voice signals have a bandwidth of 4Khz (300hz-3400hz signal bandwidth + 450*2hz guard bands= 4000hz) according to Nyquist criteria, the sampling rate must be at least double of this total bandwidth. thus sampling rate= 2*4Khz = 8Khz. this is the required sampling rate to avoid loss of voice signals in transmission.
SINCE, 1 BYTE=8 BITS
THE LOGIC IS 2^8=256(2 TO THE POWER OF 8)
The status of the Kernel is process
48 volts. This -48 volts is required by the copper wires to prevent it from corroded & eluded.