Cisco SP Video Phase III Cable Access












SP Video Phase III Cable Access exam
644-334 Exam Dumps | Real Exam Questions | 644-334 VCE Practice Test


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650-256 | 646-048 | 350-018 | 642-997 | 650-059 | 646-206 | 300-160 | 650-303 | 700-020 | 642-270 | 700-039 | 700-001 | 400-101 | 650-621 | 642-242 | 642-874 | 351-018 | 600-460 | 700-302 | 642-654 |



inserting the “Why” in faraway PHY

As cable operators proceed to study dealing with the ever-expanding onslaught of facts demand from subscribers, they ought to ask ourselves, “Is there a far better approach to do issues?” all of us have heard the unofficial definition of “madness” as “doing the same issue again and again and anticipating a distinct effect,” they are able to’t just retain going forward blindly doing issues like node splits continually as it is not a sustainable observe doing it the style it has been accomplished for the final 5-10 years .

Invoking a brand new thought system

Step back and examine the complications we're facing and what they can in fact exchange. So commonly, the trade gets so caught up within the low degree “geek aspect” of all the fantastic products and technologies developed, that they forget to ask ourselves, “What difficulty am I in fact solving?  Am I deploying this since it is new and funky or does it make experience to remedy an specific problem now or one they know is coming within the close-time period future?”

one of those applied sciences with a lot of buzz at the moment is far off PHY (RPHY). it is certainly one of a couple of competing applied sciences that are living in the enviornment of cable allotted entry Architectures (DAA). At its most primary, root definition, RPHY takes the QAM modulation/demodulation portion of the CMTS and separates it to a location backyard of the CMTS. This feature will now usually be handled at once in an HFC node within the container or a “shelf” category unit located in a hub or cupboard. The connection between the CMTS and the faraway PHY machine (RPD) is usual Ethernet.  however they don't seem to be here to speak in regards to the extensive technology that makes up RPHY. greater importantly, they should focus on what the benefits are and what issues it will probably solve.

it is important to first birth by way of opting for one of the crucial extra pervasive problems that an HFC operator is at present dealing with. The number 1 question is “How will I take care of the continued, huge expansion of data bandwidth?” There isn't a single operator within the US it's proof against coping with this, however how the problem manifests for each operator can also be very distinct.

let us explain

Take the case of a rural operator that has diverse serving territories coated with the aid of dissimilar Headends/hub websites. usually, every of these websites would come to be with its own CMTS because of distance limitations of RF Optics efficiency and the DOCSIS protocol. many times, during the past, they might were able to get away with smaller CMTS at these areas as a result of a lower bandwidth demand. If they are looking to delivery slowing down node splits by means of employing forward-searching expertise it truly is greater effective with RF spectrum like DOCSIS three.1, this might also require deploying a brand new, probably better CMTS it's in a position to the protocol. This might turn into reasonably costly. What if instead, they could centralize the services of the CMTS and use just about any type of IP community to interconnect to the sites in order produce the DOCSIS carriers by means of a RPHY shelf? If they can join the websites to an latest community, leased wavelength and even a data circuit, they will run faraway PHY. From this instance by myself, they are able to see benefits of hardware discount, vigour rate reductions, assist can charge reduction and operational ease of handiest having a single CMTS. now not to point out attaining the goal of deploying the greater ahead-searching technologies that you set out to do which can also have in any other case been too expensive.

On accurate of this illustration, here are a couple of more benefits that they will see from faraway PHY:

  • by means of taking the RF QAM era out of the CMTS, it turns the platform into an IP in and IP out piece of equipment. This typically allows for the CMTS platform the means to handle extra bandwidth through it if it has the suitable backplane and processing potential. This, in turn, makes it possible for an operator no longer to ought to set up as many individual CMTS units as in the past, thus saving helpful rack house, power, cooling and customary manage hardware along with administration time and support and protection contracts.
  • by using moving the PHY layer of the CMTS doubtlessly out to the node, you could have a compounding effect on how a lot more effective DOCSIS 3.1 is. DOCSIS three.1 will run at bigger modulation orders when SNR gets bigger. for those who take out any or the entire normal RF Optical hyperlink and switch it right into a digital IP link, you turn out to be doing away with a large element of the SNR that may, in turn, result in the bigger modulations. thus, having the capability of being able to push more facts through the same volume of RF spectrum as before.
  • When looking at making an outside plant structure alternate of cascade reduction of anything smaller than what the operator has nowadays all the manner down to Node + 0, the talents variety of transmitters and receivers needed might probably turn into overwhelming from an area and powering standpoint. In distinction, far flung PHY uses high-density Ethernet switching in region of an RF combining community and the Ethernet hyperlinks in vicinity of the RF optical hyperlinks. This presents the skills to tremendously cut back the house issues needed.
  • There are one other two advantages of the use of Ethernet because the transport for far off PHY. the primary is the capacity to now probably mesh the RPHY transport into an already latest lengthy haul and/or metro IP community. This allows for for a superb effectivity of getting two advantages out of the equal IP transport community. The second improvement of the usage of Ethernet is the skill to profit the potential for real redundancy additional out into the network because of the resiliency of many IP protocols.
  • lots of these merits were realized currently by means of a customer of Cisco and CCI methods that deployed a totally converged CMTS and video deployment (CCAP) over remote PHY into a serving territory that obligatory to now have 1 Gbps/s features employing DOCSIS three.1. This operator essential to deliver all their services for voice, video, and facts over a single leased circuit. This proved to be an ideal utility for far flung PHY as it allowed the operator to garner much greater effectivity in density of their CMTS, minimized the footprint of equipment essential to be deployed within the serving territory and increase the modulation profile of the DOCSIS three.1 carriers that have been applied, consequently giving the operator extra information throughput within the same amount of RF spectrum.

    CCI methods labored with the operator from starting to conclusion on the project, beginning with taking note of the should be mindful the issue to solve. It became promptly decided that far off PHY would supply the operator the highest quality technical and monetary answer for no longer best this probability, however additionally for the long run for growth. CCI techniques then completely designed and procured the whole conclusion to end answer together with the CMTS, IP switching structure, video ingestion and delivery, backyard Plant nodes and passives (N+0), and any OSP facilities essential like cupboards and powering. moving to the start part, CCI deployed the total solution while working very intently with the customer team of workers so they would be in a position to instantly take over the answer for day after day operations.

    From a solution standpoint, CCI and the operator relied on varied platforms from Cisco. The Cisco cBR-8 was used because the CMTS platform along with the GS7000 node to deliver the far off PHY delivery within the plant. Cisco switching become utilized for aggregation of the Ethernet community.  CCI also integrated distinctive different 3rd birthday party items to complete the whole answer from Headend to outdoor plant.

    Do you need to recognize extra concerning the fruits of instance presented above? CCI and Cisco can be on-hand all week on the SCTE Cable Tec Expo in Denver, CO to talk about RPHY alternate options with operators. consult with sales space #1319 to communicate directly with weblog creator, Todd Gingrass, related to your community’s challenges and future calls for and greater remember what answer is right for you.

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