RHM 3 Part 2 100-200

101. It is the nth generation mobile technology. It supports calls and SMS only. It has a data rate of 270 kbps over- the -air, 13 kbps for speech coding, and an actual transmission rate of 9.6 kbps.

102. A network that encompasses a city and its environs.

103. It is a means of avoiding full-cell splitting where the entire area would otherwise need to be segmented into smaller cells.

104. Is the smallest block of data transmitted over a network.

105. Is the process of adding headers into the data.

106. These are used to facilitate the orderly flow of data from source to the destination.

107. These are used to represent the various symbols used for letter, numbers, and punctuations in the English language.

108. It is also known as the Telex Code developed by Thomas Murray. It was the first fixed-length character developed for machines.

109. It is an 8-bit character code developed by IBM and used in IBM-compatible equipment. It has 256 codes making it the most powerful character set.

110. Was developed by the grocery industry to identify their products. It is a continuous code since there are no interchangeable spaces.

111. It is a variant of FSK which uses the minimum possible frequency shift for a given bit rate.

112. A pattern showing all the possible combinations of amplitude and phase for a signal.

113. A neutral zero voltage represents binary 0. Binary 1s are represented by alternating positive and negative voltages.

114. It is the comparison process between frequencies.

115. A connection process that occurs between two stations before any data are actually transmitted.

116. A worldwide public network of networks that connects a very wide variety of computers, applications, and users.

117. It is a means of decreasing CCI while increasing the channel capacity by using directional antennas.

118. In ISDN, BRI is also called:

119. FIR means:

120. A type of serial data transmission in which data is sent when it is ready to be sent without being synchronized. It is also known as start-stop transmission because each character is framed between start and stop bits. A logic 0 is used for start bit and all stop bits are logic 1s.

121. A combination of asynchronous and synchronous transmission, wherein the data are checked by a common timing base and bytes are also framed with start and stop bits.

122. These are set of rules and regulations governing the orderly exchange of data within the network or a portion of the network.

123. It is a data communications protocol in which the data exchanged in an unplanned manner without prior coordination between endpoints, thus it offers a significant advantage in transmission speed.

124. Refers to the meaning of each section of data.

125. These are set of rules implementing and governing an orderly exchange of data between two layer devices; it includes line discipline, flow control, and error control.

126. It is a form of digital modulation similar to PSK except the digital information is contained in both amplitude and phase of the transmitted carrier.

127. It is similar with 16PSK (N is 4 and M is 16) but it has a non-constant amplitude output signal.

128. Give redundancy and improve the performance of line coding. It changes a block of m bits into a block of n bits. Also referred to as mB/nB encoding technique.

129. A method where the signal modulates a carrier that is linearly swept over the band being used.

130. Are generally manufactured and controlled by one company. Advantage are tighter control, easier consensus, and a monopoly. Disadvantage- lack of choice, overpricing.

131. A system for organizing data-transmission protocols developed by the International Standards Organization.

132. It is the transfer of a mobile unit from one base station's control to another base station's control.

133. BRI is designated as:

134. IIR means:

135. It is the receiving station in a data link protocol.

136. It is a frame, block, or packet of data, which identifies the receiving station.

137. It is the response of the destination station when it is not ready to receive.

138. It is the regulation of the rate of transmission of data frames. It coordinates the rate which data are transported over a link and generally provides an acknowledgement mechanism.

139. The source station can transmit several frames in succession before receiving an acknowledgement; there is only one acknowledgement for several transmitted frames.

140. The received BPSK waveform is filtered and squared.

141. It has the faster acquisition time than the squaring and the costas loop.

142. A process used to achieve non uniform quantization.

143. The carrier is keyed on and off by the pseudorandom code sequence.

144. Created the sets of rules and standards for graphics and document exchange and provides models for equipment and system compatibility.

145. A method of organizing a network in which a physical path is dedicated to communication between two nodes for the duration of the communication.

146. It is a make-before-break process wherein the mobile unit establishes contact with the new base station before giving up its current radio channel by transmitting coded speech signals to two base stations simultaneously.

147. In 2B+D, the bandwidth of each “D” channel is:

148. It has 50% error detection, and also the simplest error detection scheme used for data communications systems and is used with both VRC and HRC.

149. It is also known as character parity. It is an error detection scheme that uses parity to determine if a transmission error has occurred within a character. Usually uses odd parity.

150. It is probably the most reliable scheme for error detection. It is an error- detecting method in which the binary number corresponding to the group of bits to be checked is divided by a predetermined binary number.

151. It is an error detection scheme wherein the data that is transmitted has a count accompanying it.

152. The process of determining errors and correcting them.

153. Also known as ARQ (Automatic Request for Retransmission). It is an error correction scheme in which the receiving terminal automatically calls for retransmission of the entire mesage.

154. It is a popular error correction code developed by Richard Hamming. It is an error-correcting code used for correcting transmission errors in synchronous data streams, however, it will correct only single bit errors.

155. It is an alternative form of digital modulation where the binary input is contained in the difference between two successive signaling elements rather than the absolute phase.

156. Defined as the ratio of the transmission rate in bps to the minimum bandwidth and has a unit of bps per Hertz.

157. Multiple bits of data are transmitted simutaneously down multiple wires within the circuit.

158. Occurs during signal propagation because signals of different frequency arrive at the receiver at slightly different times.

159. Means to place a capsule or other protected environment.

160. The second layer of the OSI model, responsible for detecting and correcting errors within frames of data and providing the flags that indicate the beginning and end of frames.

161. It controls the system operation, calls, track billing information, and locates cellular subscribers.

162. In ISDN, PRI is also called:

163. A digital filter system that has finite duration unit sample response. I.e h(n)=0 for n<0 ad n≥M. Thus the unit sample response exists for the duration of 0 to M-1.

164. Consider a noiseless channel with a bandwidth of 10 kHz is transmitting a signal with four level signal levels, what is the maximum bit rate in kbps the channel can handle?

165. It is a discipline for serial by bit information transfer over a data communications channel.

166. It is similar to x-modem except that the information field has a minimum capacity 1024 bytes.

167. It organizes data into 128-byte blocks and employs a CRC for excellent error control.

168. It is a bit-oriented protocol developed by IBM for use in SNA, and was the first link-layer protocol based on synchronous, bit-oriented operation.

169. It is a modified high-level data link control protocol by ITU-T.

170. Is a bit or sequence of bits that indicates the beginning or end of a certain packet.

171. It is an empirical record of a system's actual error performance. It is measured and compared with the expected probability of error to evaluate a system's performance.

172. It is as simple as the energy of a single bit of information

173. A type of serial data transmission in which data is sent when it is ready to be sent without being synchronized. We send bit 0 as start bit and bit 1 in the end of each byte.

174. A device containing both a modulator and demodulator.

175. Serve as s structural guideline for exchanging information between computers, workstation, and networks. Endorsed by ISO and ITU-T

176. The third layer of the OSI protocol model; it sets up the path to transmit data between terminals and arranges data into packets.

177. It consists of a control unit and a transceiver that transmits and receives radio transmissions to and from a cell site.

178. The number of B channels for PRI varies according to the nation: in North America and Japan it is:

179. A digital filter system that are non- recursive. Thus the output of this filter depends upon present and past inputs.

180. A data compression techniques in which some amount of data is lost. This technique attempts to eliminate redundant information.

181. It is a lossless compression technique, in which each time a zero is encountered in the input data, two values are written to the output file.

182. It is a lossless data compression technique named after Albert Huffman; the idea of the compression is to assign frequently used character fewer bits, and seldom used characters more bits.

183. It is a lossless compression technique, and this term refers to several technique that store data as the difference between successive sample or characters, rather than directly storing the samples themselves.

184. A lossless data compression technique named after Lempel, Ziv, and Welch. It is the foremost technique for general purpose data compression due to its simplicity and versatility. It uses a code table consists of 12 bit codes.

185. It is based on a simple premise; when the signal is passed through the Fourier transform, the resulting data values will no longer be equal in their information carrying roles.

186. It is a compression standard for digital video sequences, such as in computer video and digital television networks; it also provides for the compression of the sound track associated with the video.

187. Is an initial video and audio compression standard

188. Is a transport, video, and audio standard for broadcast-quality television.

189. Expands MPEG-1 to support video/audio objects, 3D content, low bit rate encoding and support for digital rights management.

190. Is the multimedia framework.

191. It consists of sampling analog information signals and then converting those samples into discrete pulses, and transporting the pulses from a source to a destination over a physical transmission medium.

192. The position of the constant-width pulse within a prescribed time slot is varied according to the amplitude of the analog signal.

193. A type of serial data transmission in which data is sent at the same time as other related data. Used in TV for audio and video.

194. Is a circuit that translates a pair of binary inputs into one of four possible dc output voltage levels.

195. Prepares and sends data, receives data, and controls data flow between the computer and network.

196. A network-to-network connection that passes only data addressed to a node in the other network.

197. Is the transmission from the mobile unit to the base station.

198. 23B+D has an aggregate bit rate of 1.544 Mbps, this is equivalent to:

199. A digital filter system that has infinite duration unit sample response. I.e h(n)=0 for n<0. Thus the unit sample response exists for the duration of 0 to ∞.

200. It is a general term that describes the interface equipment used at the stations to adapt the digital signals from the computers and terminals to form more suitable for transmission.