T b - KTH
... – A single base station can support a small office – Multiple base stations in a cellular configuration can support a larger office ...
... – A single base station can support a small office – Multiple base stations in a cellular configuration can support a larger office ...
Chapter 1 - William Stallings, Data and Computer Communications
... Every computer has a radio modem and antenna with which it can communicate with other systems. Standard for wireless LANs: IEEE 802.11, which most systems implement and which is becoming very widespread. ...
... Every computer has a radio modem and antenna with which it can communicate with other systems. Standard for wireless LANs: IEEE 802.11, which most systems implement and which is becoming very widespread. ...
Lecture 01
... One OC-192 optical signal = 10x109 bps One optical fiber carries 160 OC-192 signals = 1.6x1012 bps! ...
... One OC-192 optical signal = 10x109 bps One optical fiber carries 160 OC-192 signals = 1.6x1012 bps! ...
Chapter 7: Transmission Media
... signals to the satellite on an uplink • the satellite then repeats those signals on a downlink • the broadcast nature of the downlink makes it attractive for services such as the distribution of television programming ...
... signals to the satellite on an uplink • the satellite then repeats those signals on a downlink • the broadcast nature of the downlink makes it attractive for services such as the distribution of television programming ...
William Stallings Data and Computer
... mainly intended for carrying signaling, billing and management information to control ISDN services (out-of-band control messages) may be either 16 or 64 kbps ...
... mainly intended for carrying signaling, billing and management information to control ISDN services (out-of-band control messages) may be either 16 or 64 kbps ...
Voice over IP at UCSB
... and synonymous with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone. Internet telephony refers to communications services — voice, facsimile, and/or voice-messaging applications — that are transported via the Internet, rather than th ...
... and synonymous with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, and broadband phone. Internet telephony refers to communications services — voice, facsimile, and/or voice-messaging applications — that are transported via the Internet, rather than th ...
Chapter 13: Wireless Networks
... communication frequencies below1 GHz using no more than 5 MHz of bandwidth and supporting data rates up to 10 kbps Big LEOs: Work at frequencies above 1 GHz and supporting data rates up to a few megabits per second ...
... communication frequencies below1 GHz using no more than 5 MHz of bandwidth and supporting data rates up to 10 kbps Big LEOs: Work at frequencies above 1 GHz and supporting data rates up to a few megabits per second ...
Introduction to Communication Network
... These servers are inside the telephone network Internet-based servers at the edge can provide same ...
... These servers are inside the telephone network Internet-based servers at the edge can provide same ...
Convergence Technology Chapter Objectives
... Recognize physical topologies in data networks Describe Ethernet and CSMA/CD network access method Describe the different types of Ethernet access methods Describe the techniques used in Token Ring, ATM, & FDDI network access Main characteristics of network transmission methods – X.25, Fra ...
... Recognize physical topologies in data networks Describe Ethernet and CSMA/CD network access method Describe the different types of Ethernet access methods Describe the techniques used in Token Ring, ATM, & FDDI network access Main characteristics of network transmission methods – X.25, Fra ...
How hiSky Leverages High-Throughput
... But there are places where one can get that "old time feeling." A glance at world 2G/3G/4G coverage maps shows that there are lots of places without effective coverage – or any coverage at all – where network users either have to put up with a weak signal, or get themselves to a specific site where ...
... But there are places where one can get that "old time feeling." A glance at world 2G/3G/4G coverage maps shows that there are lots of places without effective coverage – or any coverage at all – where network users either have to put up with a weak signal, or get themselves to a specific site where ...
guided media (twisted pair, coaxial cable, and optical fiber)
... Delay distortion: occurs in guided media. It is caused by the fact that the velocity of propagation of a signal through a cable is different for different frequencies. For a signal with a given bandwidth, the velocity tends to be highest near the center frequency of the signal and to fall off towa ...
... Delay distortion: occurs in guided media. It is caused by the fact that the velocity of propagation of a signal through a cable is different for different frequencies. For a signal with a given bandwidth, the velocity tends to be highest near the center frequency of the signal and to fall off towa ...
Slide 1
... Communications Devices What are examples of communications devices? Common types are dial-up modems, ISDN and DSL modems, cable modems, network cards, wireless access points, routers, and hubs ISDN and DSL modems send and receive data from ISDN and DSL lines ...
... Communications Devices What are examples of communications devices? Common types are dial-up modems, ISDN and DSL modems, cable modems, network cards, wireless access points, routers, and hubs ISDN and DSL modems send and receive data from ISDN and DSL lines ...
Chapter 4 Transmission Media
... 4. Use especially for P2P applications 5. Usually use for long distance communications ...
... 4. Use especially for P2P applications 5. Usually use for long distance communications ...
Basic Concepts
... decide which of several ports (connections) to use to send the packet back out Complex B Made at each switch B? D? Switch A D Packet ...
... decide which of several ports (connections) to use to send the packet back out Complex B Made at each switch B? D? Switch A D Packet ...
1 - A1.net
... 18 Which standard is used by most large cable companies for sending data over cable television cables? ...
... 18 Which standard is used by most large cable companies for sending data over cable television cables? ...
Radio Merit Badge Req 8
... hear in a radio show or in a commercial. Most broadcast announcers will have a 4-year college degree (although not required) in communications, journalism, or broadcasting. A pleasant voice is a consideration for an announcer career. In high school courses you should seek to excel in English and wri ...
... hear in a radio show or in a commercial. Most broadcast announcers will have a 4-year college degree (although not required) in communications, journalism, or broadcasting. A pleasant voice is a consideration for an announcer career. In high school courses you should seek to excel in English and wri ...
Chapter 1 - Introduction
... The twisted pair wiring used to deliver telephone service to such locations exceeds the maximum distance for technologies like ADSL ...
... The twisted pair wiring used to deliver telephone service to such locations exceeds the maximum distance for technologies like ADSL ...
Frequently Used Terms PC Hardware RAM – Random Access
... wireless hot spot projected from a cell phone, which is obtaining internet access from either the WLAN it can receive, its own interior data plan). Bluetooth – Wireless personal area networking technology. Bluetooth is a global wireless communication standard that connects devices together over a fi ...
... wireless hot spot projected from a cell phone, which is obtaining internet access from either the WLAN it can receive, its own interior data plan). Bluetooth – Wireless personal area networking technology. Bluetooth is a global wireless communication standard that connects devices together over a fi ...
Chapter 1 - William Stallings, Data and Computer
... constant data rate using packet switching technique with multiple virtual circuits ...
... constant data rate using packet switching technique with multiple virtual circuits ...
Chapter 1 - William Stallings, Data and Computer
... # For six devices connected in mesh, how many cables are needed? How many ports are needed for each device? # What is the consequence if a connection fails for five devices arranged in: a) Mesh b) Star (excluding hub) c) Bus d) Ring ...
... # For six devices connected in mesh, how many cables are needed? How many ports are needed for each device? # What is the consequence if a connection fails for five devices arranged in: a) Mesh b) Star (excluding hub) c) Bus d) Ring ...
Transmission Media
... Baluns provide a BALanced-to-Unbalanced interconnect Balanced cables typically are twisted pairs Unbalanced cables typically are coaxial cables Baluns are often used to allow twisted pairs to replace more expensive coaxial cables Impedance match Connector match ...
... Baluns provide a BALanced-to-Unbalanced interconnect Balanced cables typically are twisted pairs Unbalanced cables typically are coaxial cables Baluns are often used to allow twisted pairs to replace more expensive coaxial cables Impedance match Connector match ...
ALevelComputing_Session13
... Bit rate to send the data at and how much to send at a time. Error checking method, parity, echo e ...
... Bit rate to send the data at and how much to send at a time. Error checking method, parity, echo e ...
early forms of long-distance communication
... were chosen because they are easy to transmit in Morse code: "S" is three dots, and "O" is three dashes. The Electric Telegraph In the early 19th century, two developments in the field of electricity opened the door to the production of the electric telegraph. First, in 1800, the Italian physicist A ...
... were chosen because they are easy to transmit in Morse code: "S" is three dots, and "O" is three dashes. The Electric Telegraph In the early 19th century, two developments in the field of electricity opened the door to the production of the electric telegraph. First, in 1800, the Italian physicist A ...
William Stallings Data and Computer Communications
... Coupling of signal from one pair to another Coupling takes place when transmit signal entering the link couples back to receiving pair i.e. near transmitted signal is picked up by near receiving pair ...
... Coupling of signal from one pair to another Coupling takes place when transmit signal entering the link couples back to receiving pair i.e. near transmitted signal is picked up by near receiving pair ...
History of telecommunication
The history of telecommunication began with the use of smoke signals and drums in Africa, the Americas and parts of Asia. In the 1790s, the first fixed semaphore systems emerged in Europe; however it was not until the 1830s that electrical telecommunication systems started to appear. This article details the history of telecommunication and the individuals who helped make telecommunication systems what they are today. The history of telecommunication is an important part of the larger history of communication.