With all due respect David, VL does not crumble in the face of
interference and the notion of that is silly with any objective
reasoning. For example, Alvarion sell thousands of VL units into North
America every quarter. Either the VL is only sold to markets that are
interference free OR VL can reliably work even in interference). Good
engineering and good equipment can deal with all but the most onerous
situations. Fortunately such situations are rare.
I know many of you may find that hard to believe, but if it were true
we'd have been forced to stop selling VL ages ago. Quite the opposite is
happening. In fact, now with the huge performance gains and the
eat-every-other-product's-lunch double play ability in VL that came with
version 4.0 coupled with the pricing now available through the
AlvarionCOMNET program, I'm seeing more converts to VL than you might
believe. Actually, I should qualify that. Few outright conversions, but
many now using VL for new markets or adding VL into competitive brand
networks for the first time to be able to capture customers and/or
deliver services that they could not before.
Essentially, I've now finally got the pricing and performance
combination that is stirring things up considerably. The principal
competition mostly only has fear ("psst, psst, you can't survive without
sync 'cause the UL world is just too scary for you!") left to keep their
WISPs from braving the luscious green grazing outside of its pen.
Alas Dave, how long will that keep their flock in line? With VL now at
about 40mbps per sector, massive double play ability, about 2X the range
per cell as some product, the ability to connect high ARPU enterprise
class bandwidth customers period (much less in scale and in pmp), and
now CPE pricing in line for even residential...well, it's finally just
too tempting for many to ignore anymore. At the very least, it's finally
getting some of you to say, "Well, let's see for myself if the scary
things are true or not."
In any event, all this change from the status quo is great for WISPs, if
only to have you re-assess your options, improve or grow your business
models, or simply reinforce your opinions.
Regards,
Patrick Leary
AVP WISP Markets
Alvarion, Inc.
o: 650.314.2628
c: 760.580.0080
Vonage: 650.641.1243
[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of David Sovereen
Sent: Friday, January 05, 2007 9:55 PM
To: WISPA General List
Subject: Re: [WISPA] churn,double play and why WLP is key - I finally
understand it
How many VoIP calls does BreezeACCESS VL support at MOS ~ 4.0 in a noisy
environment, such as when SNR is <= 10? How about <= 3?
Yes, I already know the answer to these. Maybe it was unfair for me to
ask.
The issue that you conveniently side-step is that service providers
operating in unlicensed spectrum operate in noise, as they do not have
control over other users of the same spectrum.
For me, because I know I do not fully control RF conditions, the ability
to
reliably deliver packets reliably, even in the presence of interference,
trumps the in-lab performance of equipment where no noise exists, which
I
don't see as an indicator of reality.
Dave
----- Original Message -----
From: "Patrick Leary" <[EMAIL PROTECTED]>
To: "WISPA General List" <[email protected]>
Sent: Friday, January 05, 2007 3:12 PM
Subject: [WISPA] churn,double play and why WLP is key - I finally
understand
it
...So I'm here at our annual national meeting and our project manager is
explaining the Wireless Link Prioritization feature available for
BreezeACCESS VL. Frankly, it has always seemed esoteric to those of us
non-technical types, but now I got and it is simple enough.
First, I learned the statistical improvement in churn when a provider
has double play VoIP + data customers. We have had a few CLECs report to
us that with a single play model their churn is about 9%. Adding double
play takes it down to close to 1%. This is critical to the business
model because they said a 10% reduction in churn translates into about a
20% improvement in NPV per subscriber. That's obviously huge. So what's
the WLP feature available in BreezeACCESS VL have to do with any of
this?
BreezeACCESS VL can already do QoS priority tagging of packets per CPE
using layer 2 (802.11p), layer 3 (IP TOS, DSCP) or layer 4 (TCP/UDP port
ranges common with Cisco, for example). That's good and already better
than most brands of BWA gear. BUT, that's only PER CPE. In a typical
situation, this does not help at all when multiple CPE are on a sector
-- there is no prioritization at the RF level in unlicensed from any
brand...until now.
WLP (also called multimedia application prioritization) actually solves
this and enables over-the-air prioritization for the first time in the
industry. The translation for this is that BreezeACCESS VL can now
deliver massive VoIP, up to 288 concurrent calls per sector with a MOS
(mean opinion score - a rating of voice quality) of 4.1. That's a
phenomenal quantity that is more than 10x our main competitor as spelled
out in their own relevant VoIP document.
So why not just use VL with firmware version 4.0 without getting the WLP
feature? The WLP is the key to get the quantity AND THE QUALITY of
service since it reserves air priority for the VoIP. So, in a double
play business model, it is essential to get MOS voice quality of at
least 4.1 and even 4.33 you must implement the WLP.
I believe it can now be said without reservation, that if you are using
unlicensed and wanting to implement a double play of VoIP + data, the
ONLY product out there that can do it in scale and with toll quality is
BreezeACCESS VL.
Regards,
Patrick Leary
AVP WISP Markets
Alvarion, Inc.
o: 650.314.2628
c: 760.580.0080
Vonage: 650.641.1243
[EMAIL PROTECTED]
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