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Showing posts from 2009

Unix Sort

One of the most helpful webpages when it comes to how-to in using the sort command.

Click me!

(ok, so it wasn't a lot. but it does lead you to a good direction doesn't it.)

When your video can't play

I've had this problem (ok,..so I usually write a how-to when I got a problem to fix) whereby my recently acquired laptop (my last one was stolen..#uck#n thieves..) was not able to play any movies at all.

Talk about NOT being able to play movies on your laptop! Such blasphemy! Ok, so I know that you're not even suppose to go around and watch a movie using your company's property, but I mean come on..who does'nt?

Anywho, after months of surviving without my own able-to-watch-laptop (I've been using my wife's since then :P ), recently I found this comments which attributed my problem to a DirectDraw problem. Full coverage of that thread here : System freezes when trying to play ANY movie

So after disabling the hardware accelaration on my laptop - I could play them movies again! Yippee!

Time to watch some episodes of the X-Men cartoon (the one that usually airs at 7pm back then) that I've been downloading.

SS7 Architecture

Image
Below is a picture depicting the SS7 architecture.


With SS7, a packet data network overlays and controls the operation of the underlying voice networks, signaling information is carried on an entirely different path than voice and data traffic. Signaling in essence does not take a lot of time, hence it is possible to multiplex many signaling messages over one channel - and that's why the signaling system is a packet network.

SS7 entire architecture performs out-of-band signaling (in which conversation and signaling take over different paths). It (the architecture) defines the procedure for the setup, ongoing management, and clearing of a call, and it enables the passing along of customer-related information that helps in routing calls.

The key components of SS7 are:

1. SSP:Service-switching points
Them switches that originate and terminate calls. It serves as the source and destination point for the SS7 messages

2. STP: Signal transfer point
Responsible for translating the SS7 mess…