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Telephone
By :
Dyah Eka Octavia
Telecommunication Engineering
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1. To accept / send a call
2. For transmitter : change voice signal toelectric signal for long distance transmittion
For receiver : change electric signal to voicesignal
3. To request phone line when headset israise.
4. Sending some number will calling, a numberrise by user with push a botton intelepohone.
5. Receive some tone who indication call
process (ringing,busy,waiting)
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Simple Component of Telephone
Three component of simple telephon is speaker, microphone and
swich/hook switch
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In Speaker : We can hear acaller voice.Electric signal convert to
Voice signal
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In Mikrophone :1. Have a diaphragm which
voice will vibration in thisarea.2. Electric signal convert to
voice signal like a callervoice.
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Hook switch like a pushbutton, with fungtion forconnect and disconnecttelephone from telephonenetwork.
An network only present iftelephone raise.
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Othercomponentfrom telephone
is keypad andringer
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Indication if any someonecall our number
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For sending number whowill we call. Consist of 12button. From 0 9 and #, *
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TipRing
Sleeve
All customer connect to Central Office by local loop cable, with name T (Tip)and R (Ring).If handset in shut position (on hook), switch hook in cradle is open condition.So, no current flow from central office by T dan R to handset.If handset in raise position (off hook), the current DC is flow by central office
to customer.
1. LOCAL LOOP
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2. Call Initialitation
After caller get a loop current is following a dialtone from sentral office. Dial note is indicationsentral ready get a phone number.
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3. Sending Number
Caller can sending number with2
way :- Rotary Dial
- Dual Tone Multi Frequency
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Addresing destination number : Sentral will adressing
your destination number, and connecting caller todestination number
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4. Connecting to Destination
Sentral respons a call by connecting to destinationnumber
If destination number off-hook, sentral will send a busytone
If destination number on-hook, sentral will send a ring
tone
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5. Accept Caller
If destination number, respons a call by raise handset. Socurrent will give from sentral to destination number
Sentral will stop ring tone and ring back tone
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6. Conversation
W
hen destination number raise a handset(respons call),sentral give a special line for pair customer. Special linekeep until one of caller end call.
7. End the Conversation
Call will end if one of caller close the handset. Off-hook
signal is indication sentral realease the connecting line
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