VoIP Codec and Bandwidth

Posted by JohnP 08/05/2007 at 15:42

Cisco has a handy table
that compares quality (subjective) with bandwidth based on most of the popular codecs used by SIP VoIP ATAs today.

Codec BR NEB
G.711 64 Kbps 87.2 Kbps
G.729 8 Kbps 31.2 Kbps
G.723.1 6.4 Kbps 21.9 Kbps
G.723.1 5.3 Kbps 20.8 Kbps
G.726 32 Kbps 55.2 Kbps
G.726 24 Kbps 47.2 Kbps
G.728 16 Kbps 31.5 Kbps
iLBC 15 Kbps 27.7 Kbps

BR = Bit rate
NEB = Nominal Ethernet Bandwidth (one direction)

Links

Posted by JohnP 08/04/2007 at 15:40

These are the main links I send friends:

  • Slickdeals
  • BensBargains
  • Woot
  • /.
  • Freshmeat
  • Lifehacker
  • Linux.com
  • http://www.voipgo.com/
  • http://www.hotwire.com/
  • Weather-Marietta
  • http://bigal.jdpfu.com/
  • Security Now!
  • SwansonRules
  • http://manifestinvesting.com/ – [[NAIC-based|http://www.betterinvesting.org/]] Investing Site; [[M* Dashboard:TinCup|http://www.manifestinvesting.com/dashboard/20]]; [[M* Dashboard: Solomon’s Select|http://www.manifestinvesting.com/dashboard/334]] [[M* Dashboard: NAIC Growth|http://www.manifestinvesting.com/dashboard/1222]] [[NAIC Discussions|http://community.compuserve.com/n/pfx/forum.aspx?webtag=ws-naic]] on CompuServ
  • http://www.stockcentral.com/
  • http://earnings.com/ – quarterly company conference calls.
  • http://portableapps.com/
  • http://portablefreeware.com/
  • PDALinks
  • http://pda.jdpfu.com/
  • http://www.jdpfu.com/dr/ – Disaster Recovery Lists for Home Evacuation
  • http://www.zkoss.org/zkdemo/userguide/ – ZK – Simple AJAX/Scripting WOW!
  • http://give.org
  • http://charitynavigator.org
  • http://RetailMeNot.com
  • http://BugMeNot.com

Gizmo and QoS - 27 July 2006

Posted by JohnP 06/24/2007 at 15:27

New Gizmo and router forwarding settings!

Ok, I logged into the Gizmo to make these settings: according to it (the gizmo) the following ports are reserved: 68, 16384-16403, 5060. Better than what Linksys support is suggesting. I’ll forward these from my router. VoIP quality should be perfect once this is done.

The Gizmo also has configuration settings for bandwidth management – but they aren’t clear whether they have anything to do with VoIP quality or if they help when the LAN traffic doesn’t flow thru the Gizmo.

Podcasts? July 2006

Posted by JohnP 06/24/2007 at 15:26

I’ve been listening and subscribing to Podcasts recently. My favorites are:

  • The Value Guys – Value Line Observer
  • Security Now! – a technology podcast related to computer and network security
  • PerlCast – the best hacker language
  • a number of books on tape from my local library system

I’m currently listening to Red Mars and plan to listen to Green Mars and Blue Mars immediately following. Hugo Winners are almost always a good read. Heinlein is my favorite author and has won the greatest number of Hugo awards.

News2006

Posted by JohnP 12/24/2006 at 15:17

First, this site is for entertainment only. It contains lies, truths, half-truths, and occasionally facts. Verify whatever you read here, don’t trust us – we lie. Ok, you’ve been warned.

SunRocket Offer for 2 Years of Service for $199. Please reference my home phone number if you sign up. You’ll get a free Uniden 2.4 GHz Cordless phone with 2 handsets

Comcast has been pushing their Voice Service really hard. Too hard actually.
Tonight I was called for the 5th time after requesting never to be contacted over the phone for marketing of any services by them. I had to block their number tonight.
Then the boy tried to tell me that they weren’t selling a VoIP service – a lie. Motorola provides devices as do a few others called "eMTAs" – whatever that means. Normal VoIP uses ATA devices – SunRocket calls their version a Gizmo.

I’ve decided to help a few worthy causes here. “Heinlein Society” and the Pediatric Brain Tumor Foundation.

Ok, the numbers are out on the tax revenues for 2006. Corporate Tax is up 19% and individual is up 11%. Gee, who’d a thunk it – Pro-Growth economic policies work? We are still running a deficit which is just crazy unless you are in an active war on your land. The economy has had 3+ years of growth by any reasonable measure.

Ok, Only in New Jersey is a tax increase toughted as a tax decrease. See story The governer is raising the annual expenditure by over 10%, so of course he’s having budget problems. Imagine that. This is after shutting down non-essential services for 5 days.
So he’s decided to raise the state sales tax by 1 penny. That turns into an estimated $1.1 billion per year tax increase. To get it passed, he had to agree to a tax cut for property taxes. "Over $5 billion over 10 years". Ok, lets do some simple math. A tax increase of $1.1 per year is $11 over 10 years. A tax decrease of $5 over ten years – he just increased taxes $6 billion over 10 years. If you believe that sales taxes tax the poor and property taxes tax primarily the rich, see my “Rants” on the “Fair Tax”.

VoIP rocks, but only with good QoS! I recommend SunRocket.com if you have a stable internet connection and broadband speed. Upload will be more important than download speed.