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The calling modem waits for the tone after it dials the phone line before it initiates data transmission. If it does not receive a carrier tone within a set amount of time, it will disconnect the phone line and issues the NO CARRIER message. The actual data is transmitted from the answering modem to the calling modem via modulation of the carrier.
HP Network Node Manager i (NNMi) 10.00 and the HP NNMi Smart Plug-in modules use continuous spiral discovery, [11] a network discovery technology that provides up-to-date network topology and root cause analysis. This allows network administrators to ascertain the level of congestion in their networks and identify the root cause of the congestion.
It is possible to use a modem without the DCD signal, however the only way for the computer to know that a connection is disconnected is by the modem transmitting the words "NO CARRIER" over the data lines. Because the words "NO CARRIER" are also a message that could appear in the context of a normal data session (for example, if typed by a ...
The modem uses the Data Carrier Detect (DCD) pin to signal whether it's connected to a host. The computer can generally just read the DCD pin at any time and always know if the modem is in command or data mode. DCD high means data mode, and low means command mode. DCD is a signal sent from the modem to the computer.
User at modem A issues a dial command: AT-Get the modem's ATtention; D-Dial; T-Touch-Tone; 12125550100-Call this number RING: Modem A begins dialing. Modem B's phone-line rings, and the modem reports the fact. ATA: Computer at modem B issues answer command. CONNECT: CONNECT: The modems connect, and both modems report "connect".
Power cycling is the act of turning a piece of equipment, usually a computer, off and then on again.Reasons for power cycling include having an electronic device reinitialize its set of configuration parameters or recover from an unresponsive state of its mission critical functionality, such as in a crash or hang situation.
Some troops leave the battlefield injured. Others return from war with mental wounds. Yet many of the 2 million Iraq and Afghanistan veterans suffer from a condition the Defense Department refuses to acknowledge: Moral injury.
ScanJet is a line of desktop flatbed and sheetfed image scanners originally sold by Hewlett-Packard (HP), later HP Inc., since 1987.It was the first commercially widespread image scanner on the market, as well as one of the first scanners aimed at the small office/home office market.