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Questions tagged [modem]

A device for sending a digital signal down an analog line

A device for sending a digital signal down an analog line, such as a telephone line, DSL, cable etc.

Name comes from modulator-demodulator. In the case of a phone modem, the digital data is converted (or modulated) into sounds which can be transmitted over a voice telephone line. The modem at the other end converts the sounds back into data (demodulation).

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Why did dialup modems make noise?

I know that the signal was just tone pulses but why was it when (back in the 90s) when you first connected to the internet you heard a bunch of funny noises. After that if you were to use the internet, it still was using the telephone line, why no…
Celeritas
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Use a smartphone as a Dial Up Modem?

Most cellphones today have an audio jack that works as both output and input for sound. That's why there's headphones today with built in microphones for making phone calls. Now then, is it possible, using this two way audio jack, to make a dial up…
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How do I access my modem's GUI when it's in bridged mode?

I wanted to try setting up my ActionTec P5001a DSL modem/router in bridged mode with a Linksys E2500 router for improved NAT performance. Switching the modem to bridged mode and the router to PPPoE worked perfectly, but now I seem to have no way to…
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How can Internet speed be 10 times slower without a router than when using the same connection with a router?

I am trying to figure out what is the realistic "speed of service" that my Internet company provides to my house. Here are the test that I am running: Internet ↔ modem ↔ wireless router ↔ laptop: Internet speed (using an internet speedometer test):…
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What are the disadvantages (if any) of accessing the internet through two or more "chained" routers?

My Problem I just got internet setup in my dorm room at school through a third-party provider. The modem they gave me, however, also functions as a wireless router. I also have my own router with DD-WRT on it, which I would much prefer to use over…
Breakthrough
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My ISP doesn't use a modem. How does this work?

I have only an Ethernet cable straight to my apartment. The Internet works when I just plug in this cable into the computer. They say that there is a switch somewhere in the apartment building. Where is actually the modem? Is it somewhere on the ISP…
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Router restarts after big git push or big file upload

My problem is that modem (Modem / router #1 presented below) restarts itself, when I make git push with a lot of files (I'm not sure how big the push must be to break the connection, but smaller pushes with only a couple of files are working…
Bartłomiej Zieliński
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Receive and route phone calls through computer

I volunteered to work for a political campaign. We want to make a unified number (with multiple lines) to put as contact us number. We want it to work like customer support numbers, you call a fixed number (most probably short number) receive a…
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How to make phone calls using a PC, modem, headphone and no actual phone instrument

I have a phone landline connection and I DO NOT have a phone instrument. I connect the cable into my laptop, and want to make calls using my laptop. I have an HDA CX20561 modem. I seem to be able to dial number using dialer.exe, though nothing…
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What is the cable that runs from the cable modem to a wall outlet

I was wondering what type of cable runs from the modem to the wall outlet in my house? Is it a coaxial cable? I'm very confused by what I've read around the internet. There seem to be many variations. Some talk of HFC and others just refer to copper…
user447436
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Internet connection drops every hour

I recently built a new desktop computer, which works fine except for connecting it to our network. I have an ethernet cable directly connecting my modem to my computer, and around every hour or so, the internet connection cuts off not just for me,…
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Wi-Fi stops working every 10 minutes on Mac OS X

Every 10-15 minutes, my Internet connection fails in the following manner: Cannot load websites Cannot connect to Dropbox Cannot connect to IRC Skype still works Slack still works Still able to connect to my router and modem After much searching,…
Graham Swan
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What is the name of this cable that goes into a modem?

I have bought cable internet from teksavvy and the modem arrived however the cable that comes out of the wall and goes into the modem where it's labelled "Cable", is very short. What's the name of this cable? But most importantly can I buy one that…
Joan Venge
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Looking for network simulator (subnets, routers, etc..)

I am looking for network simulator (subnets, routers,wireless etc..) to study for an interview that I have.
Ben
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What is this port labeled "ONT" and what does it do?

This image is from the back of an AT&T uverse 3801hgv modem. What the purpose is of this port. :
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