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.
Processor serves the interrupt request after completing the execution of the current instruction.
Need 4 T1's.
Each T1 can accomodate 28 channels.
► 47 digital channels
► 3 low speed V.machines at 384 kbps.
=384/64=6channels
► 1 interactive video systemat 1.536mbps.
=153664=24 channels.
So total=47+6+24=89 channels
each T1 requires 1 synchronizing channel & 1 signalling channel.
So 4 T1 requires 8 channels.
Total=89+8=97 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
7. Frequency at which VOICE is sampled is?
a) 4 KHz
b) 8 KHz
c) 16 KHz
d) 64 KHz
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.
8. What is the maximal decimal number that can be accommodated in a byte?
a) 128
b) 256
c) 255
d) 512
ITS 256.
SINCE, 1 BYTE=8 BITS
THE LOGIC IS 2^8=256(2 TO THE POWER OF 8)
9. The status of the Kernel is?
a) task
b) process
c) not defined.
d) none of the above.
The status of the Kernel is process
48 volts. This -48 volts is required by the copper wires to prevent it from corroded & eluded.
flag register part of PSW(Program Status Word)
To store address of next instruction to be executed.
13. What is the need of CPG message in ISUP protocol?
Consider any call forwarding scenario.As soon as switch receives Setup, it checks that the Called_Party has forwarded option activated and so tries to forward the call. Meanwhile, Switch sends CPG message towards originator saying that Call is in Progress.
The line of sight is the distance or the path up to which the the TX and the RX is visible to each other because for the proper transmission there should be a ink or connectivity b/w the TX and the RX e.g. at the RF transmission the microwave links are required for the connectivity and data transmission.
TRANSCODER SUBMULTIPLEXER
a)allocated in RAM.
stack memory is used at the time of dynamic memory allocation
ex:- malloc();
Answer is D.
A 2Mb PCM line has 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel(time slot 0).
storage of data within transmitting medium until the receiver is ready to receive.
in my opinion the following procedure buffering follws so ans is c not a.
The following procedure follows:-
1 An alarm is written into the buffer.
2The alarm is read from the buffer, sent, and re-sent until it successfully reaches the destination(receiver).
3 The alarm is removed from the buffer.
22. What is the best Rx power and Tx power at good RF Conditions?
If u r talking in the sense of Satellite then
it is 6 GHz uplink that is for transmitter and 4 Ghz for downlink frequency that is receiver frequency.
23. What is a matrix in Telecommunication?
It is a rectangular table of elements, which may be any abstract quantities that can be added an multiplied i.e m*n where m is row and n is columns.
24. How to explain what is ss7?
Common Channel Signaling System No. 7 (i.e., SS7 or C7) is a global standard for telecommunications defined by the International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T). The standard defines the procedures and protocol by which network elements in the public switched telephone network (PSTN) exchange information over a digital signaling network to effect wireless (cellular) and wireline call setup, routing and control.
