phone

A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from Greek: τῆλε (tēle, far) and φωνή (phōnē, voice), together meaning distant voice. A common short form of the term is phone, which came into use almost immediately after the first patent was issued.In 1876, Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice at a second device. This instrument was further developed by many others, and became rapidly indispensable in business, government, and in households.
The essential elements of a telephone are a microphone (transmitter) to speak into and an earphone (receiver) which reproduces the voice in a distant location. In addition, most telephones contain a ringer to announce an incoming telephone call, and a dial or keypad to enter a telephone number when initiating a call to another telephone. The receiver and transmitter are usually built into a handset which is held up to the ear and mouth during conversation. The dial may be located either on the handset or on a base unit to which the handset is connected. The transmitter converts the sound waves to electrical signals which are sent through a telephone network to the receiving telephone, which converts the signals into audible sound in the receiver or sometimes a loudspeaker. Telephones are duplex devices, meaning they permit transmission in both directions simultaneously.
The first telephones were directly connected to each other from one customer's office or residence to another customer's location. Being impractical beyond just a few customers, these systems were quickly replaced by manually operated centrally located switchboards. These exchanges were soon connected together, eventually forming an automated, worldwide public switched telephone network. For greater mobility, various radio systems were developed for transmission between mobile stations on ships and automobiles in the mid-20th century. Hand-held mobile phones were introduced for personal service starting in 1973. In later decades, their analog cellular system evolved into digital networks with greater capability and lower cost.
Convergence in communication services has provided a broad spectrum of capabilities in cell phones, including mobile computing, giving rise to the smartphone.

You do not have permission to view the full content of this post. Log in or register now.
  1. O

    Course [UDEMY] AI Cold Calling Course 2024: Automate Phone Calls using AI

    Hidden content
  2. V

    Pa suggest po phone mga lods budget po is 25k

    Either Iphone or Samsung po mga lods, ang purpose po ng phone is young quality ng cam po, plus pang pag-aaral narin po...bali bukas napo kasi bibili tas hindi pa sigurado kung ano type na phone bibilhin po Maraming Salamat in advance po 💓
  3. A

    Help Gcash app magisk detected non-rooted android phone

    may nkaranas ba nito? hindi nman rooted phone ko at wlang magisk. paano to ma fix? tia
  4. P

    Trivia Zelensky faces tough reality after Trump-Putin phone call

    It must have been bad enough for Zelensky to hear Trump's abrupt announcement that he had welcomed Russia's President Vladimir Putin back to international diplomacy with a 90-minute phone call, to be followed by a face-to-face meeting, perhaps in Saudi Arabia. After Putin, the White House...
  5. P

    Help Phone Call Recording Samsung A55 2024

    mga papa Ask ko sana Paano Mag Record ng Calls. sa Android a55 samsung 5g walang built in. kung 3rd party hindi nireecord ang Tumatawag . ang owner lang narerecord paano kaya Toh? tulong naman kase pang depensa sa sarili sa mga tinatawag na di maganda sa akin
  6. S

    DITO DITO sim sa keypad phone

    Possible ko bang mapagana ang DITO sim sa keypad na phone.. 3g yung signal indicator pero walang signal bars.. sana may makatulong.. salamat po
  7. B

    Android App Hot Phone Check Mod: Device Info Know your Device Insight (2/11/25)

    :Bits:Pafollow and Support po mga papz salamat po❤️Sharing is Good❤️Godbless po KaPhc Fam:Bits: 登录 Facebook :Bits:Phone Check: CPU & WIFE Master ♻️ v1.8.1 (Premium) ------------------------------------------------- 💁 Details Phone Codes, Country Codes, Memory & CPU info, Battery Info, Smart...
  8. P

    Android App ACR Phone Pro Mod Apk v0.350 [Pro]

    PlayStore Link : ACR Phone 💬 App Description : ACR Phone Dialer & Spam Call Blocker is a phone app that can replace your default dialer. This is a brand-new app and we are constantly improving it. 🔖 Mod Features here : 👑 Premium/ρáíd Features Unlocked Hidden content
  9. V

    May chance pa po kaya to phone nato mga lods?

    Matagal napo kasi ito nasira ayaw mag po mag on, nag display naman pag e ccharge yung phone pero hangang display lang talaga kung ilan na percentage ng battery po...May crack nadin po eto sa lcd po Name po sa phone is Samsung A11 po mga lods, is there any ways pa kaya ma fix mga mga lods...
  10. T

    Help Buying new phone.

    Hindi ako gaano maalam sa phone. Badly need an insight what's best phone. Budget 20k below. Thanks you po!
  11. S

    Help About po sa phone

    alin po mas maganda. para sa inyo🥺 patulong po.
  12. X

    Help Xiaomi Phone no display

    Paano maayos to mga boss binuksan ko ang likod ng phone ko at naka limutan ko i off ang phone, at iunplug ko ang battery lilinisan ko sana ang board nya due nag faflash kasi ang screen. pag bukas ko sa phone nag white screen bigla
  13. J

    Android App Minimalist phone launcher v1.16.0v200 MOD APK (Premium Unlocked)

    minimalist phone is a friendly app specialized in helping users keep track while focusing on something and doing certain tasks without being distracted by anything. The app will have numerous hilarious features and extensions that effectively reduce distraction and help you improve your focus...
  14. L

    Help Android phone suggestions

    Suggest guys ng phone under 20k. Thank you
  15. S

    Help Best budget meal phone under 10k?

    Pang gaming lang sana & pang back up phone. I don't mind the quality of camera
  16. C

    Android Reco naman 15k worth Android Phone na may Engineering mode

    Matagal malowbat at matibay sana thanksss
  17. T

    Help Mainit ba talaga phone pag gumagamit ng displaylink?

    bumili ako ng displaylink, since hindi naman talaga usb3.0 na may hdmi output yung phone ko, so na i try ko yung wavlink displaylink. ok naman no delay nakakapaglaro ng ayos. ang problema ko lang eh mainit yung phone compared sa normal gaming. tanong ko sino dito yung may displaylink, mainit ba...
  18. T

    Bakit ponnot compatible sa phone ko?

  19. S

    Question po kapag po ba na FRP Bypass yun Samsung Phone magiging open line na rin sya?

    nakalock po kasi sa AT&T na carrier yun samsung phone po salamat sa mga sasagot.
  20. P

    Help Best phone recommendation for casual used

    https://phc.onl/#forbidden#/2rWTjY8vYDI?si=zhI3sA-TYZwqDeQO
  21. B

    Help Installing Windows OS using Android Phone

    Pwede po kaya mag install ng OS gamit ang android phone? TIA
  22. A

    Paano mag block ng IMEI ng nawalang phone

    Paano mag block ng IMEI ng nawalang phone nanakaw ang phone at wallet ko kaninang umaga meron bang paraang para ma block o terminate ung phone remotely gamit ang IMEI ?
  23. R

    Help Phone LCD, Need to access files

    Pa help po, pwede po ba maaccess ang phone na nasira na yung LCD (Blackscreen), at kuning ang mga files na nandoon (Documents, Pictures, etc.). Maraming salamat po sa response.
  24. J

    Help OLD FLAGSHIP PHONE

    HELLO PA SUGGEST NAMAN NG OLD FLAG SHIP PHONE NA GOODS PA NGAYON SALAMAT...
  25. M

    Help Pasuggest 2nd hand android phone

    2K budget, ano sulit na bilihin ngayon na 2nd hand na android phone guys ? pang lazada ko lang 🙂 Salamats.
  26. A

    Referral Mas mataas na gpu ng phone mas mataas ang posible earning sa your fantastic pet

    Mas mataas na gpu ng phone mas mataas ang posible earning sa your fantastic pet
  27. S

    Phone recommendation

    I'm planning to buy a 2nd hand phone, redmagic 7 pro, rog 5s pro, or ip13? ano kaya mas better for casual gaming at goods na camera?
  28. K

    Direct Link ACR Phone 0.348 [Pro] [Mod Extra] (Android)

    ACR Phone 0.348 [Pro] [Mod Extra] (Android) Dialer & Spam Call Blocker is a phone app that can replace your default dialer. This is a brand-new app and we are constantly improving it. We ask only permissions that are absolutely required. For example, while allowing contact access enhances...
  29. N

    Help Help po , na lock yung phone ko

    Sino po may alam kung paano ito ayusin. na format ko yung phone ko tapos nun na lock sya, nakalimutan ko po yung password Redmi 8 yung phone ko
  30. L

    Help Ask about rooted phone

    Meron ba kayong mga häçk Jan SA games SA naka root na phone please pasend link
  31. C

    Help Question for Samsung Galaxy S25 Ultra / Samsung Phone Enthusiasts pasok po

    Hi!! itatanong ko lang po sana if may available installment plans si S25 Ultra pre order without using Credit Cards? I have this Samsung S22 Ultra 512gb here which I bought po from my officemate and would like to trade in sa S25 Ultra kaso need ata CC pag installment sa Samsung site mismo. are...
  32. D

    Closed Ask lng po kung mag aupdate po ba ung phone kung ipapower off ko ndi po restart nadl na kase ung update ayaw ko kase iupdate

    ask lng po kung mag aupdate po ba ung phone kung ipapower off ko ndi po restart nadl na kase ung update ayaw ko kase iupdate salamat po sasagot
  33. D

    Tutorial Meron po ba para sa android phone

    iptv po para sa android phone tnx.
  34. M

    Phone lcd glue

    how much po kaya bayad if mag pa glue mg lcd sa phone? Natanggal kasi yung lcd but need siya ipadikit
  35. B

    Crypto Ano pinagkakakitaan nyong crypto sa phone pa share naman

    Pa share naman sa comment
  36. Z

    Unlocked Phone

    hello baka meron jan may alam ng pag Unlock ng phone para makagamit ng ibang sim network, salamat po.
  37. L

    Help Best Tools for Rooted phone?

    Ano magandang tools sa rooted phone
  38. P

    Help Phone Activation

    Magandang araw, baka meron po kayo sir/maam ng pang unlock sa huawei y7a.
  39. G

    Tutorial Pang haçk ng wifi ng kapitbahay using termux (Rooted phone) only working script and updated script from github by anbuinfosec using Wipwn script.

    First turn off your Wifi. Turn on Hotspot. Turn on Location Copy the code inside of your termux app pkg update && pkg upgrade -y pkg install root-repo -y pkg install git tsu python wpa-supplicant Pixiewps iw openssl -y git clone https:/ /github.com/anbuinfosec/wipwn cd wipwn chmod +x...
  40. R

    Meron pa ba working na Fb app para old phone like Nokia na jar format?

    Sinubukan ko kase iopen yun nakainstol na fb dito sa old phone na nokia pero hanggang loading lang kahit wifi koneksyon ko o data ayaw gumana.
  41. P

    Latest GCAM for All Phone Brands

    What's new!! ➡️Maximum viewfinder brightness; ➡️Disable zoom in portrait mode; ➡️Starting value of digital zoom; ✔️Fix for some AUX issues for Oppo, Realme devices; ✔️Fix for image resolution for 16:9 aspect ratio; ⭐️Added Custom Sensor Resolution (in some cases it helps to set the correct size...
  42. Z

    Android App For Xiaomi phone

    Kung gusto nyo makita kung updated na ba yung phone nyo or gusto nyo makita yung mga hidden app. Hidden content
  43. V

    Help How to häçk wifi using only phone

    How to häçk wifi using only phone
  44. X

    Help Asking for idea about creating GMAIL without phone number

    Mga bossing, meron ba kayong idea creating gmail without phone number. Needed lang po talaga. For educational purposes only and not intended or gagawin sa anong kasamaan. Maraming salamat po sa pag share ng idea if ever meron po.
  45. M

    Help Turn on Oppo Phone (All Buttons Not Working)

    Can someone help me how to turn on an oppo phone without using all the buttons (since all the buttons are not working)? is there like any program for it?
  46. S

    PC App Req: Looking for PC app to clone mobile

    Mga sir baka may alam po kayo for PC app para iclone po ang android phone to another android phone. Salamat
  47. K

    Help Gaming Phone 20k Budget

    Any recommended gaming phones for 20k budget?
  48. A

    Help 10k gaming phone?

    Hi! Any recommendations po for a an entry-level gaming phone under 10k? I only play CODM (and sometimes LnD 👀) sa phone. I'm not into photography or video creation, so a decent cam is more than enough. I'm actually considering Nubia Neo 2 5G, pero nagdadalawang isip ako if worth it pa ba sya...
  49. W

    Help Tracing Name using Phone Number

    Possible po ba na ma trace ung name gamit lang ang phone number? If so please po patulong.
  50. R

    Need Recommendation for Android Phone (Budget 10K below)

    torn between tecno camon 30s and the infinix hot 50 pro +
Back
Top