Landline - Wikipedia

 

5v from telephone line

A landline telephone (also known as land line, land-line, main line, home phone, landline, fixed-line, and wireline) is a phone that uses a metal wire or optical fiber telephone line for transmission as distinguished from a mobile cellular line, which uses radio waves for transmission. In , the CIA World Factbook reported approximately billion main telephone lines worldwide. Apr 11,  · This circuit will convert 60VV AC phone line electricity to pure 5V regulated DC out. You can use this circuit for all the applications, that work using 5V power. Parts that you need; 1) KL Author: LahisTech. The lcd has no other source of power as is turns off when I disconnect the line. I'd like to power up a V quartz analog clock using the phone line. Is that possible? Any circuit suggestions welcome. Thanks. Edit: The phone line has had no failures, at least since , since they switched to .


dc - How to draw current from a telephone line? - Electrical Engineering Stack Exchange


Discussion in ' The Projects Forum ' started by damienwhiteNov 9, Load More Articles. All About Circuits. Reply to Thread. Nov 9, 1. Nov 9, 2 0. Hi, I am currently putting together a project which i will be connecting to a telephone line. I have everything sorted except for the fact that i need a constant 5 VDC to power the device. The problem i have is that there are 3 different voltages that exist on a phone line and they vary between AC and DC, 5v from telephone line.

Thanks in advance. Nov 9, 2. Feb 4, 4, You will need a kind of voltage regulator SMPS is preferred in this case this a telephone line does provide enough power but I don't know what is the maximum output current of a telephone line.

Anyway, this threat will be closed by a moderator since it is not legal to do that. Nov 9, 3. Jul 17, 22, 1, Your telephone company will likely disconnect your service not long after you connect your project, and won't re-connect it until after you have removed your project from their lines - and there will be charges for the reconnection of the service.

Telephone companies are not in the business of supplying power; just telecommunications. If they were in the power business 5v from telephone line would not be called telephone companies; they would be called power 5v from telephone line. Nov 9, 4.

Nov 29, 1, A 5V zener across the telco line will provide what you want. Observe its polarity or use it after a quad diode steering bridge. Nov 9, 5. Hi Guys, We will be getting this tested by the relevant testing authorities. This is a prototype of a commercial product which i am trying to build so it will certainly not be illegal.

I just dont have the financial resources to hire engineers to design this part of the circuit. I want to draw current the same way any regular telephone or caller ID unit wants to. My problem however is i need constant power where most telephone devices do not need power all the time. Thanks guys. Nov 9, 6. Oct 2, 5, 1, Nov 10, 7.

Feb 19, 6, Think of a Telco switch with 50, users, if every home were drawing 50mA, the phone company would need to deliver 2, amps kW continually. Isn't that a bit much to ask of them when they are only supplying power for voice and ringer? The actual 5v from telephone line delivered is a throwback to the carbon microphone days of the phone system, when a handset had no amplifier. Nov 10, 8. Dec 20, 11, 1, 5v from telephone line 5V zener diode 5v from telephone line waste all the current from the phone line maybe as high as 30mA if the central office is nearby making heat.

There will not be any current to power your circuit. My speakerphone has its low volume audio amplifier powered from the phone line.

It uses 20V at about 10mA. If your circuit draws power all the time then the phone line will be off-hook all the time and the phone company will disconnect the "faulty" phone line. Nov 10, 5v from telephone line, 9. Sep 26, 2, 5v from telephone line, Last edited: Nov 10, Show Ignored Content. Related Forum Posts:. Replies: 2 Views: Replies: 9 Views: Replies: 5v from telephone line Views: Testing my telephone line.

Posted by jmoffat in forum: General Electronics Chat. Posted by Mathematics! Replies: 1 Views: 1, 5v from telephone line, You May Also Like:. The Cicret Bracelet The Cicret bracelet is the best tech you've never heard of--and it could someday be a reality.

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5v from telephone line

 

Great but Cheap 5v 4a Mobile Charger, Cheap Cellphones & Telecommunications, Mobile Phone Chargers, Car Chargers, Power Bank as well as Cheap and more! Online Get Best 5v 4a Mobile Charger You Need from santacruzblog.ga, A Leading Online Retailer! An idle telephone line tempts designers to use its 48V potential as a power source. However, Part 68 of the US Federal Communications Commission's telecommunications regulations states that any device that connects to the phone line and is not actively communicating must present a resistance of at least 5 MΩ (Reference 1).To meet this requirement, a device's continuous-current drain must not. A landline telephone (also known as land line, land-line, main line, home phone, landline, fixed-line, and wireline) is a phone that uses a metal wire or optical fiber telephone line for transmission as distinguished from a mobile cellular line, which uses radio waves for transmission. In , the CIA World Factbook reported approximately billion main telephone lines worldwide.