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In network topology, a cable modem is a network bridge that conforms to IEEE 802.1D for Ethernet networking (with some modifications). The cable modem bridges Ethernet frames between a customer LAN and the coax network. Technically, it is a modem because it must modulate data to transmit it over the cable network, and it must demodulate data ...
Cable Haunt is the code name assigned to represent two separate vulnerabilities that affect many of the cable modems in use around the world in 2020. [ 1 ] [ 2 ] These vulnerabilities allow an attacker to obtain external access to a cable modem and perform any number of activities intended to modify the operation of, or monitor the data passing ...
A device driver for the modem was introduced with Mac OS X version 10.4.3. It retailed for US$ 49 at the time of its introduction. Apart from using the Apple USB Modem for Internet dial-up and faxing, it is also being suggested as a low cost line interface (aka FXO interface) for telephony applications, such as for telephone systems (software ...
The 1200 bit/s market existed for a relatively short time; in 1984 the CCITT introduced the V.22bis standard for 2400 bit/s operation. This was the first time that the CCITT's standard predated Bell's introductions, avoiding compatibility issues that had plagued earlier standards. Modem companies quickly incorporated V.22bis into their product ...
Data Carrier Detect (DCD) or Carrier Detect (CD) is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent from a data communications equipment (DCE) to a data terminal equipment (DTE), i.e., from the modem ...
16-bit Type II PC Card: IBM V.34 data/fax modem, manufactured by TDK. All PC Card devices use a similar sized package which is 85.6 millimetres (3.37 in) long and 54.0 millimetres (2.13 in) wide, the same size as a credit card. [14] Type I Cards designed to the original specification (PCMCIA 1.0) are type I and have a 16-bit interface.
The 201A Data-Phone was a synchronous modem using two-bit-per-symbol phase-shift keying (PSK) encoding, achieving 2,000 bit/s half-duplex over normal phone lines. [10] In this system the two tones for any one side of the connection are sent at similar frequencies as in the 300 bit/s systems, but slightly out of phase.
The 1200 bit/s mode is compatible with V.22. V.23 is an ITU-T recommendation for half-duplex communication between two analogue dial-up modems using FSK modulation at up to 600 or 1200 baud to carry digital data at up to 600 or 1200 bit/s respectively. An optional 75 baud reverse channel carries 75 bit/s. V.24 is referenced as RS-232 which also ...
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