I dunno if I'd use anything less than G.711.
--
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
- Original Message -
From: Chuck McCown - 2 [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Sunday, April 06, 2008 11:08 PM
Subject: Re: [WISPA]
The cell carriers aren't using G711. I haven't seen how much a UMA call
takes up, but I'd bet it's less than the 90K of G.711u. UMA basically
encapsulates a GSM stream inside of an IPSEC tunnel. EDGE traffic gets
up to 100K+ when surfing or downloading files, so I could see a data
stream
Yes. If you are doing Gigs of traffic, peering make sense. Maybe even with a
few 100mbps, depending on the capacity sold to customers.
But there can also be disadvantages with peering with host sites
1) Flooding. When they don't have a cost to you, they are more likely to
flood you with
A lot of people mention using DSL instead of a T1.
Rule #1- If your business model doesn't work for full price T1s, ($600 per
mon), don't get involved in providing service.
In the long run, You'll go crazy trying to support a WISP on a DSL
connection.
Not from a speed perspective, but from a
G.726 @ 32 kbps should be a lossless ADPCM transcoding of normal PCM G.711.
I have listened to many codec and vocoder tests over the years and I could
never hear the difference between PCM and ADPCM. I think that the 32k
variant conveys all of the same data as uncompressed PCM. Nice thing is
Last I heard, some of the cell carriers are using CELP. That works pretty
good but is noticeably worse than the PCM and ADPCM methods.
- Original Message -
From: Bryan Scott [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Monday, April 07, 2008 7:58 AM
Subject: Re:
Well right. With transit so cheap these days, I'd look at it more as an
increase in quality than a decrease in expenses.
--
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
- Original Message -
From: Tom DeReggi [EMAIL PROTECTED]
To: WISPA General List
Pretty sure G.722 is obsolete and has been rolled into G.726
Most GSM systems use a variant of CELP, ACELP I think. G.729 I think.
All of the CELP methods suck when compared to G.711/22/26 PCM/ADPCM methods.
- Original Message -
From: Mike Hammett [EMAIL PROTECTED]
To: WISPA General
I guess I should qualify that a bit. They suck when you are comparing voice
quality.
They are superior when delivering arguably acceptable voice communication
with a minimum of bandwidth.
- Original Message -
From: Chuck McCown [EMAIL PROTECTED]
To: WISPA General List
Hi all,
Looking for recommendations for a GOOD set of RJ45 crimpers. Brand and
model would be great.
Thanks!
WISPA Wants You! Join today!
http://signup.wispa.org/
Paladin 8000 multi die crimper. Used to 5 or 6 sets for it, from DSub
to RJ11/6/45. Some of the dies are off brand that I picked up at a
local flee market. The RJ45 came with it, cost about $60 shipped. I
will only use clam shell from the nose crimpers, every single side
crimper I have used made
G.711 *can* support FAXing, otherwise g.729 is very common for voice.
John
Mike Hammett wrote:
I know. ATT and T-Mobile use GSM (the GSM for wireless is the same as the
GSM VoIP codec). I dunno if the CDMA operators translate to anything in the
VoIP world or not.
I've tested with
John, please explain *can* or what is best for faxing?
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of John Thomas
Sent: Monday, April 07, 2008 12:59 PM
To: WISPA General List
Subject: Re: [WISPA] Femtocells
G.711 *can* support FAXing, otherwise g.729 is
Sorry sent this to the promotions committeeoops!
Just wanted everyone to know that Matt and I went to this conference on
Friday that was put out by Jack Unger a couple of weeks ago. It was very
interesting, a bit more academic than the usual conference, but well
worth it.
We met Tim
g.729 should from a mathematic point of view be able to do everything
g.711 does.
- Original Message -
From: John Thomas [EMAIL PROTECTED]
To: WISPA General List wireless@wispa.org
Sent: Monday, April 07, 2008 1:58 PM
Subject: Re: [WISPA] Femtocells
G.711 *can* support FAXing,
Hi,
I just had to get into a Cisco 3512XL switch that we have installed in a
commercial office building. While there, I happened to notice:
Taylors uptime is 4 years, 13 weeks, 2 days, 2 hours, 36 minutes
That's pretty amazing considering it's only on a BackUPS 350 (about 20
minutes of
Not as impressive but here's my record:
Model CoreBuilder 3500 (rev AA)
System Up Time 2 Years 254 Days 22 Hours 18 Minutes
Travis Johnson wrote:
Hi,
I just had to get into a Cisco 3512XL switch that we have installed in a
commercial office building. While there, I happened to
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