20% of standard G.711 packet is used by IP, UDP and RTP headers. Â G.711 payload consists of 160 bytes and IP, UDP and RTP headers total roughly 40 bytes.
G.711 Packet
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Monthly Archives: January 2009
QSIG
QSIG is a peer-to-peer signaling system used in corporate voice networking. Â Internationally, QSIG is known as Private Signaling System No. 1 (PSS1). Â This open standard is based on the ITU-T Q.9XX series of recommendations for basic service and supplementary services. Â Therefore, as well as providing inter-PBX communications, QSIG is compatible with public and private ISDN.
QSIG also has one important mechanism known as Generic Functional Procedures (QSIG GF). Â This mechanism provides a standard method for transporting features transparently across a network.
Source: Â Voice over IP Fundamentals (Second Edition) – Cisco Press
Propagation Delay
Light travels through a vacuum at a speed of 186,000 miles per second and electrons travel through copper or fiber at approximately 125,000 miles per second. Â A fiber network stretching halfway around the world (13,000 miles) induces a one-way delay of about 70 ms. Â Although this delay is almost imperceptible to the human ear, propagation delays in conjunction with handling delays can cause noticeable speech degradation.
Source: Â Voice over IP Fundamentals (Second Edition) – Cisco Press
Wiki – Propagation Delay
New theme, plugin and random thoughts.
Found a nice new WordPress theme today that I really like. Â Of course its the one this blog is currently running and its called iNove. Â Very clean and simple, like the black title area at the top, not to dark not to light just right all around.
Also installed a new plugin for the blog that makes it iPhone-ified if you will.  Plugin is called WPTouch and is really nice. So now any iPhone or iPod Touch visiting the blog will get to experience a very nicely formatted and optimized interface.  I would encourage all WordPress bloggers out there to take advantage of this plugin.
Overall a rather nice overhaul of the blog for the new year, now if I could only get myself to post more. Â I don’t blog in the traditional sense as I don’t believe I have much insight to offer anyone and always kinda thought “bloggers” must have a bit of egomania if you will for them to think they would have readers and followers.
No my “blogging” is really just for me. Â Collection of personal thoughts and ideas that I want to remember and be able to look back on some day. Â Also a way to document challenges and projects at work, lessons and things learned that might prove valuable to me or others again some day.
Striving to document more this year and share my thoughts and opinions a bit more frequently about topics of interest. Â Also giving myself a goal to be more active in the local (Lafayette, Louisiana) technical community. Â I have embraced some of the new social networking tools of the Web 2.0 era, and meeting and interacting with more like minded geeks. Â Not a very social person as anyone who truly knows me can attest, but I am passionate about technology and usually find that I can relate and socialize easier with those who share this passion.