What is modem Adaptor?
An analog modem adapter (AMA) is a device that enables a physical voice-band dial-up modem, that would normally connect to a telephone line, to instead connect directly to an IP network. An AMA locally demodulates the modem audio and extracts the data stream.
How can you tell the difference between a serial cable and a null modem?
The pinout of the serial connectors on both sides of the cable are exactly the same with a straight-through serial cable. A null modem serial cable (frequently called a crossover cable) is used to connect two DTE devices together without the use of a DCE device in between.
How do I make a null modem adapter?
If you have two identical DB9-RJ45 connectors, you cannot make a null-modem cable with them by simply connecting them with CAT5. A null-modem cable is essentially a serial cross-over cable where one end’s TX goes to the other end’s RX. If you use identical DB9-RJ45 you’re getting TX-TX and RX-RX.
What does an Internet adapter do?
The network adapter allows the device to communicate over the local area network (LAN), connecting to the internet or to other computers. Wireless network adapters, such as those on laptop computers and tablets, take the computer’s signals and convert them into radio waves that transmit via antenna (visible or hidden).
What is an adaptor card?
In computing, an expansion card (also called an expansion board, adapter card, peripheral card or accessory card) is a printed circuit board that can be inserted into an electrical connector, or expansion slot (also referred to as a bus slot) on a computer’s motherboard (see also backplane) to add functionality to a …
What is a modem adapter?
Why would you use adapter cards?
Adapter cards increase a computer’s functionality by adding controllers for specific devices or by replacing malfunctioning ports. Figure 1-8 shows several types of adapter cards. Adapter cards are used to expand and customize the computer’s capability: NIC connects a computer to a network using a network cable.
What are types of adapter cards?
There are many types of adapter cards that go into a computer system….By Mike Rodriguez on December 29, 2010
- Video Cards (PCI, PCIe, and AGP)
- Multimedia Cards (Sound Cards, TV Tuner Cards, and Capture Cards)
- I/O Cards (SCSI, Serial, USB, and Parallel)
- Communications Cards (NICs and Modems)
What is adaptor used for?
An adapter or adaptor is a device that converts attributes of one electrical device or system to those of an otherwise incompatible device or system. Some modify power or signal attributes, while others merely adapt the physical form of one connector to another.