how a call route from pstn to mobile.please tell in details
Answers were Sorted based on User's Feedback
Answer / praveena
How a Call is made from PSTN to Mobile:
Joe to PSTN:
Hello, this is Joe. I want to talk to Lynn.
PSTN to MSC:
Hello, I have a call for Lynn.
MSC to all base stations:
Calling all base stations. Where is Lynn?
Base station #1: Base Station #2:
Base Station #3:
Is Lynn here? Is Lynn here?
Is Lynn here?
Lynn to station #1:
(loudly) HERE
My ESN is 1123445
My Station Mark is 100 mW
Lynn to station #2:
(softly) Here
My ESN is 1123445
My Station Mark is 100 mW
Base station #1 to MSC:
Lynn is HERE and she is THIS loud.
Her ESN is 1123445
Her Station Mark is 100 mW
Base station #2 to MSC:
Lynn is here and she is this loud.
Her ESN is 1123445
Her Station Mark is 10 mW
MSC (thinking):
Hmm… does Lynn’s ESN match my records.
Yes, it does! From her ESN, I can find her HLR (home
location register) and decide how much to bill her and if
she has any special calling plans or features.
I can bill her 70 cents per minute!
Which base station shall we use? #1 was louder than #2, I
can tell that from her station mark.
MSC to base station #1:
Base station #1, set up a voice channel for Lynn.
Base Station #1 (thinking):
Hmm.. we need a new voice channel for Lynn. Jeremy just
finished using 824 MHz. We will put her there…
Base Station #1 to Lynn:
Lynn, please set your frequency to 824 MHz.
(Lynn’s phone rings.)
Lynn to Base Station #1:
(Lynn picks up the phone) Ok, frequency set to 824
MHz. “Hello?”
Base station #1 to MSC:
Ok, Lynn is ready to receive voice. Here is her
message, “Hello?”
MSC to PSTN:
Ok, Lynn is ready to receive voice. Here is her
message, “Hello?”
PSTN to Joe:
“Hello?”
Joe to PSTN:
“Hello, Lynn, this is Joe.”
PSTN to MSC:
Message to Lynn: “Hello, Lynn, this is Joe.”
MSC to Base station #1:
Message to Lynn: “Hello, Lynn, this is Joe.”
Base station #1 to Lynn:
Message to Lynn: “Hello, Lynn, this is Joe.”
Is This Answer Correct ? | 21 Yes | 5 No |
Answer / nitin sharma
"A" wants to make a call to "B" with in a city using "pstn"
which is "PUBLIC SWITCH TELEPHONE NETWORK" OR LANDLINE
PHONE TO A MOBILE PHONE?
STEP-1
Call will go to MSC, Main switching center or a telephone
exchange.
STEP-2
EXCHANGE WILL CHECK THE DIALED SUBSCRIBER NUMBER, BELONGS TO
WHICH SERVICE PROVIDER IN THE CITY.
STEP-3
AFTER SEARCH,MSC WILL FORWARD IT T0 MSC OF DIALED NETWORK
IN SAME CITY.
STEP-4
MSC WILL CHECK THE LOCATION OF HLR(HOME LOCATION REGISTER)
VLR(VISITOR LOCATION REGISTER)OR IN ROAMING/OUT OF TOWN
CALLS.
STEP-5
MSC FOUND THE "A" IS IN THE CITY. CALL WILL GO TO BSC(BASE
SWITCHING CENTER )
STEP-6
BSC FOUND "A" IS CURRENTLY IS "XYZ" AREA BSC WILL FORWARD
INFORMATION TO BTS (BASE TRANSRECIVER STATION) IT IS USED
TO TRANSFER AND RECIEVE DATA IN TERMS OF TEXT AND VOICE.
LAST STEP
BTS WILL CONNECT THE CALL TO MS(MOBILE STATION)YOUR MOBILE
HANDSET.PHONE OF "A" WILL START RINGING.
Is This Answer Correct ? | 12 Yes | 0 No |
Answer / vijay
Praveena.. ur explanation is jus awesome.. thr is no more to
say after ur explanation.. one request is there.. pls send
me the soft copy of the book or material u have from which u
got the answer... I wud b very thankful to i u.. my mail id.
vijay.swami2003@gmail.com
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / syed
Praveena.. ur explanation is jus awesome.. thr is no more to
say after ur explanation.. one request is there.. pls send
me the soft copy of the book or material u have from which u
got the answer... I wud b very thankful to i u.. my mail id.
pssyedahamed@gmail.com
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / dhiraj
Praveena.. ur explanation is jus awesome.. thr is no more to
say after ur explanation.. one request is there.. pls send
me the soft copy of the book or material u have from which u
got the answer... I wud b very thankful to i u.. my mail id
IS dsamadder44@gmail.com
Is This Answer Correct ? | 0 Yes | 0 No |
what is mean by regulation?which component used?
Respected sir, I am a student of ECE stream i need effectronics placement papers where i get those papers? can you please send me the information to my mail id? which is kamakshigudi@gmail.com
Sir,I have two years year gapping after the completetion of my 10+2.Then i had studied 1 year chemistry(hons)and had sat for part1 chemistry(Hons) exam..I got 60% in Hons also.I had sat Hons and Enginering Joint entrance exam together in the same year of 2008..But i got better opportunity and I switched to ECE..Sir,may i eligible to sit exams and interviews for any IT company,software technologies,consultancy company,electronics core company..??..thanks...
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