What is the voltage of a landline telephone?
I would like to know how much voltage a telephone line will show when it is idle and when a conversation is taking place over the telephone.
Answer:
The speech network - also known as the "hybrid" or the "two wire/four wire network" - takes the incoming signal and feeds it to the earpiece and takes the microphone output and feeds it down the line. The standard network used all over the world is an LC device with a carbon microphone; some newer phones use discrete transistors or ICs.
One of the advantages of an LC network is that it has no semiconductors, is not voltage sensitive, and will work continuously as the voltage across the line is reduced. Many transistorized phones stop working as the voltage approaches 3 to 4 Volts.
When a telephone is taken off the hook, the line voltage drops from 48 Volts to between 9 and 3 Volts, depending on the length of the loop. If another telephone in parallel is taken off the hook, the current consumption of the line will remain the same and the voltage across the terminals of both telephones will drop.
keywords :in,land,line,phone,and,of,the,on
what is the website for the do not call list?
yes i need the website for the do not call listAnswer: http://www.ftc.gov/donotcall/https://www.donotcall.gov/default.a..
what is the word used to defind "phones per 1..
Answer: per capita average or percentage. i hope i was help, i dont quite understand your question The answers post by ..
what is this high pitch noise on incoming calls?
Answer: Static.Call 611 to have it fixed. If you have SBC (now AT&T) they will fix it whenever they please.Tell the..
What is this loud buzzing noise on my phone line?
Ive connected a phone to the NID (Network Interface Device), at least there I can here WABC radio and the hum is less. I..
What is this phone number about?
I keep getting a phone call that is very strange. I do not pick up the phone. I then *69 and the number is told to me to..
What is this?
Someone called me from a number with all 9s. Has this happened to anyone before?Answer: yes, someone is playing with yo..
What is this?
I am at my aunts place in L.A for the weekend and like an idiot i left my cell phone @ home, I just checked my voice mai..
What is wrong when I use my phone out? When I call..
Could it be my headphones? I am on wireless could that be the problem? Pleasee help!??Answer: go and open your IM windo..
what is wrong with my phone?
i have 2 phones in my house: one standard, corded phone and one cordless phone. they both arent working right now. i pic..
What is ypor? 440-331-6633 ?
I get 3-4 phone calls a day from this number and I have no idea who it is. When I answer, no one is there. Anybody know ..
what it mean land line can u tell me?
will a friend toll me to try use landline so I could call himAnswer: A landline is a wire connection between two teleph..
what kind of cell phone do you have?
i have a samsung x-475Answer: razr sony ericsson k750i NEC e616v sony ericsson z520a samsung a900 blade nokia n73 A Mot..
what kind of telephone system united kingdom have?..
somebody gave me telephone unit from UK, emailer videophone by Amstrad, and i cant get it work here in the philippines. ..
What land-line (analog) phone services exist in th..
What services exist in the Austin area which provide land-line (analog) phone service w/ little or no contract obligatio..
What landline phone company servies Hawleyton, NY?
Answer: here is a good website...just put in your address and zip....and it tell you all the providers in your area!!!h..
what limits dialup access speed to internet?
Answer: i/o serial rate is slowhttp://www.nippyinternet.co.uk/free-dial...Accelerated Dial-Up at a fraction of the pric..
What local landline phone services are there in Sy..
Im looking for a landline phone service for someone that lives in Sylvania, Ohio 43560 (419-882-_ _ _ _) and she needs t..
what makes consumers buy services?
I am part of a company called Euphony, we offer free calls to 29 countries, now, my biggest challange is getting custome..
What makes international (direct dialing) call exp..
Answer: Tariffs, the ability of the national regulatory body to collect fees for interconnecting other national telecom..
what number do I dial from a landline phone to fin..
Answer: use you cell to called this number while youre by the phone...but certain places will not be listed...such as d..
what number do I dial to make a collect call from ..
Answer: Hello...CanadaDirect is run by our nations major phone providers:From China call 1. In the Canada Direct list, ..
What number do i need to dial to withhold my telep..
Answer: its 1571 and 1471 to see who called last 141 141 You can either make your number ex-directory in which case itl..
what number do I push to transfer my call to my fa..
What number do I push to transfer my call to my fax machine, that is on the same phone line as my phone, when a fax come..
What number do you call to have your telephone rin..
Answer: The answer is completely dependant on the country you are in and in many cases the carrier due to the different..
What number do you enter to unblock your number to..
Answer: Press *82 before dialing the call. In order to unblock your number, you push *82, then you dial the number your..
What number do you press so the people with collor..
Ill give 10 point to the first good answerAnswer: I assume you live in the US. Press * 67 and it will show up on their ..
What's going on with my VTECH phone?
Its a Vtech gz2334 2.4GHz Cordless Phone with Caller ID and its hooked in and everything and for the past couple of mont..
what's the best 5.8 ghz telephone?
Answer: http://wize.com/phones?c=google_phoness...http://wize.com/phones_s:10From what I can tell this site rates each ..
what's the best and cheapest local and lon..
Answer: vonage I think its reliance Cheapest:SkyeOut: Call anyone in the U.S. or Canada for $14.95 a year (yes, I said ..
What is the voltage of a landline telephone?
I would like to know how much voltage a telephone line will show when it is idle and when a conversation is taking place..
|
