Broadband SLA for latency

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exportgoldman

1202 posts

Uber Geek

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#10271 13-Nov-2006 23:04

Been a geek, doing some reading on Telecom's network. For those of you which are sick of hearing that broadband has no guarentees, SLA's or performance specs, this document (Link 1) begs to differ

Unfortunately the SLA's are to be expected. (I already knew about the highly publicised 32kbps, it comes from Telecom deploying "Conklin min-dslam's" which can support 60 ADSL connections, and have a maximum 4 Megabits backhaul (hence 32kbps is all a customer on a fully loaded mini-conklin can be physically guarenteed.)

Connection latency is 1 second (mean time)

- Also, according to (Link 2) If interleaving was turned off, ping times world drop to 8.2ms across broadband

[28 ms (interleaving) + 3.2 ms (time to traverse Telecom’s network) + 5 ms (nominal) = 36.1 ms Turning interleaving off would result in an expected latency of 8.2 ms.]

Speed SLA is 32kbps

Availability 99.3% (3.7 Days/Year downtime)

Link 1: http://www.telecom.co.nz/binarys/ws_bulletin_august_24_2005.pdf page 8 Telecoms SLA for latency on your internet

Link 2: Link 2

(Moderator edit [BG] - Added hyperlinks. Reduced length of link two URL, which was causing page width to increase. )
[Moderator edit (tonyhughes): fixed Link 2 URL - still broke page formatting.]

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

Fraktul

836 posts

Ultimate Geek

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#52236 13-Nov-2006 23:30

This document is quite old, most provider WSA's have been renewed, I believe with different specs than the one linked in you post.

Granted there is a mean <1s figure but who cares? Its not even a peak figure, its a mean and that kind of figure they may was well say they will mail you frames by post ;)

I think the point is with people saying there are no guarantees is that, yes technically they may be there, but they are so minimal that the service would be virtually unusable for the vast majority of people and still fall within SLA's. Thats pretty much as good as no SLA whatsoever.

Congratulations, you found Juha's secret TCNZ info source, the mighty wholesale informer page! ;)

exportgoldman

1202 posts

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#52500 15-Nov-2006 21:16

Theres massive amounts of information on Telecom's network around in PDFs, theres the Commerce Commission findings, the PROBE reports which detail the history of Telecom and then the NGN stuff.

Interesting tidbit - Every Exchange has to have a toilet and "tea making facilities"

Tyler - Parnell Geek - iPhone 3G - Lenovo X301 - Kaseya - Great Western Steak House, these are some of my favourite things.

Fraktul

836 posts

Ultimate Geek

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#52515 15-Nov-2006 22:23

Yeah there is quite a bit of information but its kinda...all over the place.

Sounds like a hangover from the old post office days :) we still have an old codger working for us who tells us of the NZ Post summer holiday camps that NZ Post would put on for their workers in Palmerston North or something in the 60's. A communist utopia, you were naffed if your phone broke over summer though or if you didn't want to bribe somebody a swap a crate to get a new line hooked up in less than 3 months. Some people would argue service levels have not changed much however :D