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A modern line card has no two-to-four wire conversion whatsoever; it is strictly an analog/digital interface to a system that has a completely digital and integrated signal path internally. Using actual wires to circuit switch a telephone call became obsolete when the crossbar switch (a mechanical system) was replaced by 4ESS electronic ...
Transmit site 1 [7] Transmit site 2; Transmit site 3; Transmit site 4; A function tone waveform. Tones used for remote controls are described in ratios called decibels: for example, the second tone of a sequence might be 10% of the level of the first tone. The highest level tones are set to the maximum allowable for the DS-1 channel or ...
The standard defines a 2-wire 18 gauge wire cable that can run up to 130 feet (40 m) and operates at 9600 bit/s. A message is composed of up to 21 characters, unless the engine is stopped and the vehicle is not moving in which case transmitters are allowed to exceed the 21 byte max message length.
2Wire produces a series of residential gateways under the HomePortal name that enable home networking with interfaces that range from ADSL 2+ to fiber to the node (VDSL 1 and 2), as well as FTTP. The gateways are based on integrated system-on-a-chip architectures, and have native TR-069 support, as well as support for HomePNA , MoCA , USB , 802 ...
Typically a command byte is sent requesting a response in dual mode, after which the MOSI line becomes SIO0 (serial I/O 0) and carries even bits, while the MISO line becomes SIO1 and carries odd bits. Data is still transmitted most-significant bit first, but SIO1 carries bits 7, 5, 3 and 1 of each byte, while SIO0 carries bits 6, 4, 2 and 0.
NMEA 0183 is a combined electrical and data specification for communication between marine electronics such as echo sounder, sonars, anemometer, gyrocompass, autopilot, GPS receivers and many other types of instruments.
Wire protocols provide the means for a program running under one operating system to communicate with a program running under some other operating system over a network such as an organization's intranet or the Internet. The protocol thus interconnects multiple platforms.
bit 7, if high use Unique (5 byte) address, else use Polling (1 Byte) addresses. bit 6 and 5, Number of Expansion bytes normally it set if Expansion field is used, normally 0. bit 4 and 3, Physical layer type 0=Asynchronous, 1=Synchronous bit 2, 1 and 0, Frame type 1=BACK Burst Acknowledge send by Burst-mode Device 2=STX Master to Field Devices.