The word modem is actually made of two words: "Modulator" and "Demodulator".
In the days of dial-up networking, a modem's job is to turn the digital signal of your computer into an analogue form that can then be transmitted down a telephone line to another computer.
When the computer at the other end receives it, it's own modem will then turn the analogue signal back into a digital one that the computer can understand.
Now that many phone lines are digital, a modem's job is to translate the computer's data into a form that's acceptable for the telephone line (e.g. ADSL) and of course translate it back again at the other end.
A modem allows your computer to connect to a phone line.
I think the device you're thinking of is a modem. A modem allows a computer to communicate over a phone line.
If you are referring to a modem, the it is a device that allows your computer to connect to the internet.
modem
Allows your computer to communicate with the internet across a T1 connection.
If your internet provider allows to have 2 modems, yes you can. If not, then you can't do that.
A device used to connect a computer to the internet is a modem.
Wi-Fi Modem.
A modem allows data to be transferred over a telephone line. It is a combination of MOdulate - DEModulate. One device modulates a digital signal from the computer into an analog signal for the telephone line, then the other device demodulates the signal back into digital for the receiving computer.
That would be the network card or modem.
It's called a Modem which stands for Modulator/Demodulator. Modems take digital signals from the sending computer and convert these signals into Analog so they can be transmitted over wire (phone or cable). On the receiving computer, the Analog signals are then converted back to Digital in order for the computer to decipher the information.
An internal modem is housed within the main computer. An external modem is on the outside of the computer and connected to the computer with a cable.