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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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