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10 Cards in this Set

  • Front
  • Back
ISDN can reach speeds of 128Kbps
DSL (Digital subscriber line) can reach speeds up to 9Mbps.
Cable modem can reach 2Mbps. Works with coax cable.
Kbps = kilobits per second = one thousand bits per second.
Mbps - megabits per second = one million bits per second
Gbps - gigabits per second = one billion bits per second
Tbps - terabits per second = one trillion bits per second.
Four topologies: star, bus, ring, and mesh
T1 lines have a transmission rate of 1.544 Mbps with 24 multiplexed 64-Kbps channels.
Fractional T1 is based on 64-Kbps channels.
T3 has a transmission rate of 44.736Mbps. uses two lines for sending and receiving simultaneously.
E1 through E5 are European equivalents. E1 is similar to T1, except that it carries a higher rate of 2.048 Mpbs on 32 64Kbps channels.
Frame Relay uses Permanent Virtual Circuits (PVCs) to establish stable end-to-end connections. Most commonly used Internet technology.
ATM can transmit data in excess of 600Mbps. It's the backbone of most major telecom companies.
ISDN uses copper wires. ISDN BRI (basic rate interface) has two 64Kbps B-channels for data or voice (129 Kbps) and one 16Kbps D-channel for control.
ISDN PRI (primary rate interface) has twenty-three 64Kbps B-channels and one 64Kbps chaannel for control.
Broadband ISDN supports HDTV and uses ATM. (622Mbps)
DSL is more than 50 times faster than a 28.8 modem. Must be close to the telecom CO.
SONET (synchronous Optical Network) Ranges from 51.84Mbps all the way up to 50Gbps.
SDH (Synchronous Digital Hierarchy) is a standard for synch data transmision on optical media. Euro equivalent of SONET. Goes from 155Mbps to 10Gbps.