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7 Cards in this Set
- Front
- Back
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Synchronous |
The imposition of time ordering on a bit stream, Practically a device tries to use the same speed as another device on the other end of a serial link/ However , by examining transitions between voltage states on the link, the device can notice slight variations in the speed on each end and can adjust its speed accordingly |
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Clock Source |
The device to which the other devices on the link adjust their speed when using synchronous links |
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CSU/DSU |
Channel service unit/data service unit. Used on digital links as an interface to the telephone company in the US. Routers typically use a short cable from a serial interface to a CSU/DSU, which is attached to the line from the telco with a similar configuration at the other router on the other end of the link. |
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Telco |
Telephone Company |
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Four-wire circuit |
A line from the telco with four wires, composed of two twisted-pair wires. Each pair is used to send in one direction, so a four-wire circuit allows full-duplex communication. |
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T1 |
A line from the telco that allows transmission of data at 1.544 Mbps |
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E1 |
Similar to a T1, but used in Europe. It uses a rate of 2,048 Mbps and 32 64-kbps channels |
