Agilent Technologies J3916A Congestion, Console, Control field, COP Character-oriented protocol

Glossary

Congestion

Exceeding the bandwidth of a virtual path or network capacity.

Console

The ASCII terminal, or PC emulating an ASCII terminal that is connected to the probe and used to configure, monitor, and troubleshoot the probe.

Control field

Field used to identify an I-frame, S-frame, and U-frame and control the behavior of the frame.

COP (Character-oriented protocol)

A link protocol utilizing control characters imbedded in the data flow.

CRC (Cyclic Redundancy Check)

A mathematical algorithm to derive the frame check sequence (FCS) in bit- oriented link protocols or the block check characters in character-oriented protocols.

CSMA/CD (Carrier Sense Multiple Access/Collision Detection)

The network access-control mechanism that is based on collisions and utilized by Ethernet networks. On contention-based networks, like Ethernet networks, each station must detect an idle network prior to transmitting. If more than one station transmits simultaneously, a collision occurs, all stations are notified, and the colliding stations try retransmitting after waiting a random amount of time.

CSU (Channel Service Unit)

A T1 digital signal regenerator straddling the boundary between outside (the line to/from the central office) and the inside (the DSX-1 signal distribution within the customer premises.) CSUs generally interface to DSUs or Multiplexors on the inside.

Customer Premises Equipment (CPE)

Customer owned equipment used to terminate or process information from the public network. For example, a T1 multiplexer or a PBX.

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