Codeword Error Rate Docsis
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Inc. OverviewBlogDOCSIS Basics TutorialDOCSIS 3.0 Tutorial SeriesServicesDOCSIS CMTS Expert Support and ServicePNMDOCSIS Security & Capacity PlanningOn Site System AuditRemote System AuditProduct DevelopmentBroadband ImplementationMATLAB Design ServicesMATLAB DOCSIS Bonded Upstream Impairment correctable codewords cable modem SimulationSeminarsEPONSIP Trunking and VoIPWhite PapersDigital Library DOCSIS Codeword Errors | What
Fec Errors Causes
you should know Post 108 of 186‹‹›› 09/17/2012Brady VolpeTroubleshooting DOCSIS12 comments Calculating... Calculating... DOCSIS Codeword Errors - cable modem correctables uncorrectables You will likely see them DOCSIS correctable codeword errors and uncorrectable codeword errors are available as a metric in most cable operator monitoring tools and Operations Support Systems upstream fec errors (OSS). The monitoring tools and OSS generally provide data and dashboards for users to monitor overall network health and then identify a problem when it occurs. Metrics like codeword errors are extracted directly from DOCSIS CMTSs using Simple Network Management Protocol (SNMP) or Internet Protocol Detail Records (IPDR), the later being preferred due to its reduced
Unerrored Codewords
CMTS CPU utilization. What many people struggle with are what are those codeword errors, what do they mean, and how bad is bad? This artical will answer those questions and discuss Reed Solomon forward error correction including how it corrects bit errors in the DOCSIS network. Where Codeword Errors Come From When someone is using a device, such a PC or iPad, and transmits data over a DOCSIS cable modem that larger than 16 bytes of data, an error protection algorithm kicks in called Reed-Solomon (RS) forward error correction (FEC). There are two parts to RS FEC, one is the encoder, which is in the cable modem and the second is the decoder, which is in the CMTS. As an example, the RS encoder creates an 18 byte codeword from an original 16 bytes of data transmitted by you, the user. The two extra bytes of data are added for error correction. The 16 bytes of data plus the 2 bytes of FEC is cal
IP isWhoisCalculatorTool PointsNewsNews tip?ForumsAll ForumsHot TopicsGalleryInfoHardwareAll FAQsSite FAQDSL FAQCable TechAboutcontactabout uscommunityISP FAQAdd ISPISP Ind. ForumsJoin Search similar:[Cable] Erratic speeds with upgrade to 45/4 on Bloor POIAlready posted in the direct forum but what can u tell me?[Cable] Cable modem and version autorised[Signals] correctables,uncorrectables[IA] Modem docsis codeword Reboots[Speed Issues] Has anyone else had this problem with 60 Mbps upgrade?? ccer cable Forums → US ISPs cable → Comcast XFINITY → [Signals] Uncorrectable codewords too high? uniqs18490 Share « [Connectivity]
Upstream Cer
Homestead Florida outage??? • [Signals] Which attenuator to buy?? » dorkinoPremium Memberjoin:2004-02-22Atlanta, GA1 edit dorkino Premium Member 2011-Dec-6 3:54 pm [Signals] Uncorrectable codewords too high?CM SignalsI was looking over another http://volpefirm.com/docsis-codeword-errors/ post when I noticed someone mentioned that the total # of uncorrectable codewords should never exceed the # of correctable. Is this true? If so, do I have a significant problem with my connection? Other than the occasional slowness or lag in a game, I haven't noticed too much in the way of problems. Sometimes it seems some sites are http://www.dslreports.com/forum/r26626606-Signals-Uncorrectable-codewords-too-high slower than others, but I just attribute that to the load on their servers at the time or just the general state of the connections between me and them.Curious what you guys think. Thanks.BTW, I have a Motorola SB 6120 running SB612X-1.0.3.3-SCM00-NOSH firmware w/ Comcast Blast 20Mbps service. The modem has been online for 11 days. · actions · 2011-Dec-6 3:54 pm · andyrossMVMjoin:2003-05-04Schaumburg, ILkudos:2 andyross MVM 2011-Dec-6 3:59 pm How long have your modem been up? The 6120 tends to log 1000-2000 errors during it's initial connection. What's most important is to keep an eye on it and see how often and fast it increases. Mine tends to be fairly constant once booted, but may jump up, usually accompanied by a T3 or other error in the log. It's not very often.On the other hand, ever since they changed to 8 channels here, the correctable codewords increases constantly, even though signal levels and SNR are the same as before. · actions · 2011-Dec-6 3:59 pm · ctgreybeardOld dogs can learn new tricksPremium Memberjoin:2001-11-13Bethel, CTARRIS SB6183Asus RT-AC66 ctgreybeard
Studies Featured Examples Creation Tutorial Video Tutorial Support Pricing Sign in Quick Upload Explore Explore Hot Latest Flips Community Features Case Studies Featured Examples Creation Tutorial Video Tutorial Support http://fliphtml5.com/hawx/iqwe/basic Pricing Sign in Business Fashion Health Entertainment Music Sports Art Auto The words you are searching are inside this book. To get more targeted content, please make full-text search by clicking here. Home Explore DOCSIS Codeword Errors & Their Effect on RF Impairments View in Fullscreen DOCSIS Codeword Errors & Their Effect on RF Impairments The Volpe Firm, Inc. | Proprietary and cable modem Confidential Page 5 Upstream Just as in the downstream, cable modems ... Like this book? You can publish your book online for free in a few minutes! http://fliphtml5.com/hawx/iqwe Download PDF Downloading... Share Related Publications Discover the best professional documents and content resources in FlipHTML5 Document Base. Search People are searching: business design fashion music health life sports home marketing children DOCSIS Codeword codeword error rate Errors & Their Effect on RF Impairments Published by Guset User, 2015-06-29 07:00:03 Pages: 1 - 7 Description: DOCSIS Codeword Errors & Their Effect on RF Impairments The Volpe Firm, Inc. | Proprietary and Confidential Page 5 Upstream Just as in the downstream, cable modems ... DOCSIS CodewordErrors & TheirEffect onRF Impairments The Volpe Firm, Inc. Commissioned by:3000 Old Alabama Rd. ZCorum Suite 119-434 Corporate HeadquartersAlpharetta, GA 30022 4501 North Point Parkway Volpefirm.com Suite 125 +1.404.954.1233 Alpharetta, GA 30022 Toll Free: 800-909-9441 4/1/2013 Fax: 678-507-5001 info@ZCorum.comDOCSIS Codeword Errors & Their Effect on RF ImpairmentsMonitoring DOCSIS Codeword Errors ImproveSubscriber QoEDOCSIS codeword errors is terminology that you may or may not be familiar with. Nomatter which camp you’re in it is important to know that monitoring codeword errors willenable you to improve your subscriber’s quality of experience (QoE). How is thispossible? DOCSIS codeword errors are the most effective metric to determine if a dataissue; like slow web pages, slow gaming, poor voice quality, etc., is an RF plant problemor if it is a data network problem. If you work in the field you know how critical
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