Section 14 : Remote Connectivity
저자: Emtenan saad
1. Telephony Technologies
1.1. * Central office: An office that is a few miles away from every telephone point and is considered the call center
1.2. * Frequency division multiplexing:let you handel more than one call
1.3. Analog to digital system
1.4. * Original telephone systems used frequency division multiplexing ; today they use time division multiplexing
1.5. * T1 = 24 DSOs = 1.5 Mbps * T3 = 28 DS1s = 43.2 Mbps
1.6. * E1 and E3 are European carriers
2. packet Switching
2.1. * Frame Relay ,ATM
2.2. * MBLS : designed for IP based Network
3. Connecting with Dial-up
3.1. * Dail-Up : A form of access to the Internet through a telephone lin
3.2. * U need a modem to use it
3.3. * Get ISP connection = phone number + username + password
3.4. Using ppp protocols
4. DSL Digital subscriber line
4.1. * DSL is the first high speed internet connection
4.2. * Idea of DSL is can to use telephone lines to give us high speed internet
4.3. There is two types of DSL :
4.3.1. 1-synchronous DSL upload speed is equal with download speed
4.3.2. 2-synchronous DSL upload speed is much slower than download speed
4.4. * DSL requires filters to use regular telephone
5. Remote connectivity:
5.1. * Tight VNC-port 5900 : free- work good - easy to use - simple
5.2. * Microsoft remote desktop tools- port 3389
6. ISDN and BPL
6.1. * Integrated services Digital Network and it’s
6.1.1. * 1- old to make that last mile dial up connections * 2-ISDN is unique and It is digital number one * 3-ISDN has a telephone number associated * 4- run at two speed :64-128 kbps
6.2. * BPL stand on broadband over power lines to move internet data
7. Optical Carrier
7.1. * SONET : the main fiber optic standard runs most of the top of the intu
7.2. * there is a different of type of OC carriers like the three most important
7.3. * the slowest version OC1 =STS1=51.85 Mbps
7.4. * OC3= STS3=155.52Mbps * OC12=STS12= 622.08Mbps
8. connecting with cable modem:
8.1. * Cable modems come from cable company
8.2. * MAC address clone design for cable modems
8.3. * And general cables is faster than DSL
9. connecting with satellites :
9.1. * satellites terms :
9.1.1. -two RG -6 cables One for transmission and one for receiving - Satellite modem
9.2. Run RG-6 Cable from the dish to the modem
9.3. satellite Latency
10. cellular WANNA
10.1. * choices of Internet connectivity : cellular WAN or WiMAX
10.2. * Two types of data transfer technologies:
10.2.1. 1- HSPA/ HSPA+ 2- LTE