SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Hiram Walker who wrote (2522)12/9/1998 10:33:00 PM
From: ftth  Read Replies (2) of 12823
 
Hiram, you say: <<...Terayon, the only viable 2-way coax system to me>>
My question is Why?
A few points:
--It's higher cost because the implementation is far more complex than the standard DOCSIS QPSK implementation (therefore more silicon area and higher cost)

--It's less bandwidth efficient (they quote a spreading gain of 22dB in their white paper, but the other numbers they give yield a different spreading gain) by a long shot--even with 16QAM vs. QPSK. (But that's a given for a spread spectrum system vs. a narrowband system confined to the same available bandwidth).

--It supports far fewer simultaneous users (in fact it's such a small number that I'd question whether it can be used in a U.S. system deployment with 500-2000 subscribers per node). They never say what this number is, but I'd venture to guess it can't be more that about 64 best case based on their quoted spreading gain.

If you can refute any of this, please supply links. I think you and I tossed around Terayon about a year ago. There was no substantiated technical information then, and there still isn't. The white paper on their website is a lot of hand waving interspersed with gee-whiz buzz words. The technology is impressive--it's the practicality of implementation I question (at least for the U.S. cable system model). These are the same questions I raised a year ago.

dh

P.S. I don't doubt that it can work within a limited system model and small subscriber counts per node. Perhaps that explains the mostly foreign deployments?
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News