By Steve Winder, Mike Tooley BA; Advanced Technological and Higher National Certificates Kingston University
ISBN-10: 0750652977
ISBN-13: 9780750652971
Regardless of the complexity of the topic, this wealth of knowledge is gifted succinctly and in this type of means, utilizing tables, diagrams and short explanatory textual content, as to permit the person to find details quick and simply. therefore the booklet may be necessary to these concerned with the set up, commissioning and upkeep of knowledge communications gear, in addition to the tip user.*A useful engineer's reference that places the foremost details at your fingertips*Covers crucial information, strategies and dealing practice*This replace covers the newest foreign laws
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Example text
Start/stop signalling Asynchronous transmission of character. Statistical multiplexer (see concentrator). Stop and wait protocol A protocol which involves waiting for an acknowledgment (eg, ACK) before sending another message. Stop bits The last bit (or bits), normally mark, of an asynchronously transmitted data word which signals that the line is about to be placed in its rest state. Store and forward A process in which a message or packet is stored temporarily before onward transmission. Supervisory frame A control frame.
A coaxial cable is an example of an unbalanced line (see also balanced line). Unnumbered frame A control frame. V-series A series of recommendations specified by the CCITT which defines analog interface and modem standards for data communications over common carrier lines such as a PSDN. Vertical redundancy check An error detection scheme in which one bit of each data word (the parity bit) is set to logic 1 or logic 0 so that the total number of logic 1 bits is odd (odd parity) or even (even parity).
CAT-6 is specified by standards TIA/EIA 568B, ISO/IEC 11801 Category 6, EN 50288. The category determines the maximum data rate over 100 metres of cable: Category Data rate CAT-3 10 Mbit/s CAT-4 20 Mbit/s CAT-5 100 Mbit/s CAT-5e/6 350 Mbit/s CAT-7 1 Gbit/s Note 1: 10base-T and 100base-TX transmit over two pairs (one transmit and one receive), thus 10base-T requires CAT-3 cable and 100base-TX requires CAT-5 cable. However, 100base-T4 transmits and receives over four pairs, allowing CAT-3 cable to be used.