Network transceivers

DB-15 15 sockets Female If there are three rows of five, it s probably a VGA/SVGA video adapter. If it s one row of eight and one row of seven, it might be a network transceiver port or, more commonly, a joystick port. 

D1.3 Are documented configuration specifications in place for each network component (e.g., Mainframes, Servers, Storage Devices, Transceivers, Repeaters, Bridges and Renters, etc.) ... 

Ethernet repeaters are invaluable with point-to-point media. As pointed out earlier, a network with only two nodes is of limited use. A twisted pair repeater allows several point-to-point segments to be joined into one network. One end of the point-to-point link is attached to the repeater and the other is attached to the computer with a transceiver. If the repeater is attached to a backbone, then all computers at the end of the twisted pair segments can communicate with all the hosts on the backbone. 

As their names suggest, terminal servers and print servers support the use of terminals and printers on networks. They support modems and other devices as well. The primary difference between them is that terminal servers are bidirectional devices while print servers have been unidirectional devices, at least as far as data transmissions are concerned. Unlike transceivers, repeaters, or port multipliers, terminal servers and print servers are intelligent devices which have their own network addresses and perform more than just a physical connection or signal forwarding function. 

MMbb ti/htoL For this reason, the circuitry for these networks is sometimes called a duplexer, another carry-over from communications language a duplexer in an amateur radio transceiver is a circuit which switches the antenna between the transmit and the receive modes. 

A list of various wireless wearable devices is given in Table 7.4. Different wireless technologies have been used in different wearable devices. A prototype of advanced care and alert portable telemedical monitor (AMON) wrist-worn unit is shown in Fig. 7.14 [8]. The system has two major parts a wrist-wom unit and a stationary unit at the telemedicine center. The wrist-wom unit measures physiological parameters and transmits through a Global System for Mobile communication (GSM) network to the stationary unit for data collection and processing by trained medical personnel [8]. The stationary unit is composed of a JAVA server platform and a workstation connected to the GSM transceiver. 

Thus, our initial ICEbox prototype is implemented as a stand-alone mini networked appliance, which has several unique features, one of which is a color LCD touch screen that is used as an input and display device. The ICEbox is equipped with an infrared transceiver and a standard Ethernet port the infrared transceiver is used for communication between the ICEbox and devices yet not attached to the home network, while the Ethernet port is used for communication between the ICEbox and devices attached to the home network. Another salient feature of the ICEbox is a physical key lock. This is used to restrict the ICEbox s ability to add devices to the network or configure devices on the network, as described below. 

Even in their earliest stages of development, wireless sensor networks include already radio-frequency transceivers soil, water, ion, and VOC sensors global positioning sensors microcontrollers and power sources. See Chap. 14 of second volume for VOC sensors. 

Induced attenuation distance is always present in any wireless communication model. For our case study, in the second experiment, we considered an ad-hoc network with IEEE802.15.4 technology and the propagation model exposed in the book ZigBee Wireless Networks and Transceivers (Farahani, 2008). The power loss would be expected in a smooth connection in a building can be expressed by the following equation ... 

Farahani, S. (200 ). ZigBeewireless networks and transceivers. London, UK Newnes. 

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