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10 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Synchronization data sent as an instruction set by the cable modem termination system (CMTS) to the cable modem includes
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Global timing references
quadrature amplitude modulation symbol timing MPEG-2 packet definitions foward error corrections synchronization framing |
p4
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During the initial mainenance interval,
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The cable modem sends data at the lowest possible power and slowly increases during each interval until the received power level at the CMTS is nominal, usually 0 dBmV
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p6
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When the cable modem must change its transmit frequency
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The CMTS will broadcast a new upstream channel descriptor and map before sending an upstream channel change request.
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p8
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During the registration process,
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The cable modem obtains an address to operate on the Internet, obtains date and time, downloads necessary files, and becomes authorized to use the network.
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p8
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Before the cable modem can become authorized to use the network for transmitting data,
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The CMTS must accept the modem's registration request, respond with a new SID, and complete the registration process.
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p10
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Noise
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Can be picked up from a variety of outside sources such as home appliances, electrical transformers, and even the atmosphere.
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p14
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Ingress noise can be minimized by
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Using high-quality coaxial drop cable and removing corrosion on the tap and home connectors.
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p18
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When verifying that a cable modem is functioning properly,
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The technician begins by checking the modem front panel status indicator lights.
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p21
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Quality of Service
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Defines the standards for minimizing delivery delay, minimizing delay variations, providing consistent throughput capacity, and optimizing bandwith.
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p24
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DOCSIS data transport security
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Is provided by encrypting traffic flows across the cable network, between the modem and the CMTS.
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p29
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