A device for sending a digital signal down an analog line

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134
votes
7answers
12k views

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 ...
25
votes
3answers
3k views

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, ...
22
votes
8answers
3k views

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 ...
14
votes
3answers
4k views

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 ...
10
votes
4answers
2k views

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 ...
8
votes
8answers
2k views

Cable modem speed test

Are the popular speed tests (cable, dsl, etc) that are available accurate? if so, how? Also, it seems that they only measure download speed of one file and not responsiveness, latency, robustness, ...
8
votes
5answers
49k views

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 ...
7
votes
2answers
6k views

Are modems, made for a more recent DSL standard, downwards compatible with older DSL technology?

I understand that older DSL modems aren't compatible with newer technology, but is the case same the other way around? I.e.: Is VDSL2 modem compatible with a VDSL connection? What about with ADSL or ...
7
votes
5answers
1k views

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.
7
votes
2answers
1k views

How does AT Commands work?

How does AT commands work? are they interpreted on the modem drivers? or are they interpreted inside the modems?
6
votes
5answers
11k views

Modem/Router/Networking Emulators

I'm looking for a decent source of modem/router emulators. Something along the lines of the following http://www.voiproblem.com/emulators/Netgear/ http://www.voiproblem.com/emulators/Linksys/ The ...
6
votes
4answers
10k views

How to get access to the web interface of an ADSL modem running in bridge mode?

I have a D-Link DSL-2500U ADSL modem. Its default IP is 192.168.1.1 and default login/password for the web interface is admin/admin. If I plug in the Ethernet cable to the NIC of a computer (that runs ...
5
votes
5answers
712 views

Wireless Router, Wireless Modem, Wireless Modem and Router?

What is the difference between these devices? Which one is used for which purposes?
5
votes
3answers
2k views

Connecting two computers via modems (RJ11)

I'd like to recreate old dial-up experience but without actual calling telephone provider's dial-up number. So I thought, maybe a linux machine could host ppp server and accept dial-up calls from ...
5
votes
3answers
5k views

How can I use my cell phone to establish a dial-up networking connection?

I am using Windows 7 and have a BlackBerry with T-Mobile (U.S.). I have paired the phone with my computer over Bluetooth, which automatically creates a serial port for it. I am able to open the port ...
5
votes
2answers
367 views

fax to pdf software

Does anyone now of any software (preferably windows based) that would let me save incoming faxes (over a land line) to pdfs in a folder somewhere? Clarification: I think there is some confusion. ...
5
votes
2answers
1k views

Programmable Answering Machine Software?

Are there any free or commercial answering machine software that can be programmed to play different message based on the datetime of call? hardware: TAPI voice modem on Windows.
4
votes
4answers
4k views

How important for speed is the length of the phone cable between the wall and the modem?

I have an inconveniently-placed phone jack in my office, so I am running a 10m phone cable from the wall jack to the modem, which is on my desk. Consequently, I have a very short ethernet cable ...
4
votes
4answers
420 views

Upon turning on computer, Internet won't work unless I disable then enable connection to router

My PC is connected to a Virgin Media router/modem. After turning on my PC, Internet doesn't work. In "Control Panel > Network and Internet > Network Connections" I see: Local Area Connection ...
4
votes
1answer
3k views

Will an ADSL2+ modem work with a VDSL input connection?

I have BT Infinity broadband (UK) which is Fibre to the Cabinet (FTTC) and then VDSL from the cabinet to the property. BT supply a BT Openreach branded modem to work with the VDSL connection. My ...
4
votes
4answers
2k views

Will a Clothes Dryer Cause Interference with a DSL Modem and Wireless Router?

I'm taking steps toward setting up a home file and print server, and other toys and the first step is to have my Internet connection on 24/7. The most sensible place to put it is in the laundry room ...
4
votes
2answers
1k views

PC Phone Modem Software

I'm looking for a piece of software that will let me hook a phone line up to my PC Modem and place calls over it using my mic and computer speakers. Does anyone have any experience with anything like ...
3
votes
3answers
291 views

Why doesnt the internet disconnect when we lift our headset of the telephone?

Some years back there used to be MODEMS and when you recieved a call,the internet used to disconnect,but today it does not disconnect even if I lift the headset of my telephone.How is that achieved? I ...
3
votes
4answers
2k views

Is it possible for software to detect your cable modem's MAC address or any unique factor about it?

Is it possible for software to detect your cable modem's MAC address or any unique factor about it? I'm assuming you can't but I want to double check.
3
votes
4answers
7k views

Differences between a modem, a wireless access point and a router

Can anyone explain the differences between a modem, a wireless access point, and a router? What functions do they share and which functions uniquely characterize them?
3
votes
7answers
8k views

Mac Mini's internet very slow, every other device fine (PC, iPhone, Xbox 360)

I recently haven't used my Mac Mini for about 5 days (however it was left on). I seem to be able to connect and get great download / upload speeds through my PC, Xbox 360, iPhone and parents' laptop. ...
3
votes
3answers
29k views

How can I bridge a Verizon mobile hotspot modem/router to a Linksys router?

I recently purchased a Verizon mobile hotspot (MiFi 4510L) and was wondering if I could configure my Linksys wireless/wired router (similar, but not the exact model: Linksys router) to use the MiFi as ...
3
votes
7answers
5k views

Pros/cons to turning off cable modem

A little off the wall perhaps, but ... I have a cable modem and a router for a wireless home network. Is it a good or a bad idea to turn it off at night and during the day when we're all at work or ...
3
votes
1answer
214 views

How can I connect directly to a peer using a DSL modem?

I was wondering if it's possible to connect to a friend using a DSL modem. I know that with voice-band modems, you can dial numbers and have a peer's computer answer the call and communicate with ...
3
votes
2answers
2k views

What (traditional) modems work with Windows Vista 64-bit or Windows 7 64-bit?

I have a US Robotics v.Everything modem that I occasionally used for fax and Internet dial-in backup access. However, that modem connected to my previous PC using a plain RS-232 9-pin serial port. ...
3
votes
1answer
2k views

Wireless router that doesn't need a desktop

I have a single desktop PC here at my house, and I'm about to get a new laptop. Currently, I connect to my internet provider through a modem connected directly to my desktop, but I want to get a ...
3
votes
1answer
273 views

How does a modem know which ISP to connect to?

I am terminating my contraçt with my old ISP, however, because I've already paid my account till the end of the month, this connection is still active. I have also signed up with a new ISP who mailed ...
3
votes
2answers
2k views

How can I convert files into an analogue modem sound?

Does anyone know of any software that will convert a file (any file, e.g. doc, zip, pdf etc) to a sound file so that it would play back like the old modem noises? It could then be "played" back on ...
3
votes
3answers
4k views

How can I use my USB 3G modem on Linux?

I have a USB 3G modem, which connects to the Greek GSM provider CosmOTE. Its software runs under Windows; thankfully my kernel seems to understand it is a modem, since it creates a couple ...
3
votes
5answers
93 views

How to include a short digital message in a sound recording

I wish to superimpose a short digital message, less than a kB, at an above audible frequency, but still low enough to be transmitted over FM radio stations, and then detect and decode that signal. ...
3
votes
3answers
6k views

Motorola NVG510 bridge mode

I have a Motorola NVG510 modem from AT&T, and I would like to disable all routing functions and use it as just a modem. I have a Time Capsule that's already connected and broadcasting its own ...
3
votes
1answer
2k views

How can I see the signal strength and type of connection (2G/3G) using a usb modem in Linux?

I managed to connect to the Internet using wvdial, however I am getting hardly exciting download speeds around 50 kB/s. I was really hoping to get somewhere around 150 - 300 kB/s. Hence my question: ...
3
votes
1answer
4k views

Does a USB modem have its own MAC Address?

My USB modem is now showing its MAC address in ipconfig /all. So does that mean that a USB modem has its own MAC address?
3
votes
1answer
24k views

How do I use a Zyxel P660 router as just modem so that I can connect a WRT54GL router in cascade?

I have a Zyxel P660HW-t1 v2 router (which has a DSL port) and a WRT54GL router (which does not) and the exact same situation as in this thread (UPDATE: the connection between both devices is the ...
3
votes
1answer
8k views

Windows does not detect any modems anymore[HSPA]

By an accident i uninstalled my Connect manager (ZTE). but when i re-install it the virtual CD drive is detected but it does not detect the drivers. When i direct to the folder containing the relevant ...
3
votes
2answers
3k views

Can I use the voice & SMS features of my GSM SIM through my laptop?

My laptop (a Lenovo T410s) has an internal GSM modem (device manager calls it a Qualcomm Gobi 2000 HS-USB Modem 9205) that I'm currently using a regular (voice, data, text, etc) 3G SIM in. The data ...
3
votes
1answer
278 views

Bridged DSL connection works for a bit, then fails bizarrely

I've got a BellSouth FastAccess DSL subscription that has run on an ISP-provided 2wire HomePortal 1700HW combination modem/router for a few years now with no significant issues. I recently acquired a ...
3
votes
1answer
70 views

adsl, 56k modem, microfilter

can I use a plain old 56k model built into my laptop with a adsl microfilter pluging into the telephone jack. The adsl runs to the adsl socket and I connect my modem to the phone socket. Can they run ...
3
votes
3answers
151 views

Using a PC as a router with a Verizon modem [duplicate]

Possible Duplicate: Using a PC as a router with a Verizon modem I currently live in the boondocks where the only internet we can receive is through Verizon's wireless card. This means that ...
2
votes
7answers
5k views

What is the main reason for ADSL modem/routers dying?

The other day my home ADSL modem/router (dwg 684t in this case) died. A guy from the telecom company came to my place and brought another one, but he also left this one. Now, I'm interested - it ...
2
votes
1answer
4k views

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. :
2
votes
6answers
3k views

How do I know if my DSL modem is not able to handle the ISP's bandwidth?

I have 12 MBit DSL service at home. At some point it was changed to 14 MBit without my knowledge. Then, two days ago my connection went completely down. The provider moved it to 12 MBit but I still ...
2
votes
5answers
1k views

What are the uses of a modem installed in a computer?

This might sound like a stupid question, but when I'm upgrading my pre-built computers, I always have to remove a pre-installed PCI (or PCI-E x1) modem to make room for other parts. So I'm wondering - ...
2
votes
2answers
5k views

UTP cable for telephone line possible?

One of my customers has build a new house with pre-installed cables for internet. The only thing he didn't think about was installing a cable for his telephone line. Behind his desk, he has a "spare" ...
2
votes
1answer
834 views

How can I tell if my internet speed issues are coming from my wireless router or from my ISP?

For the past couple of months I've been having major internet connection stability issues with my ISP (Charter). I have their 100Mbps package, but most of the time the speeds are all over the place. ...