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DIY PBX Chapter 5a: A Software Overview

With the telephony hardware installed and configured, and Asterisk in place, I found myself at the point where I could turn to my favourite topic: the software. And, even at the simplest, I had a lot of software to keep me busy. Luckily enough, I had the time.

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Pipelines in C

Back in 2016, a question came up in one of the groups as to how you would code a pipeline in C. The requestor wanted C code equivalent to the shell pipeline

echo "Hello World" | tr "a-z" "A-Z" | sort | rev

Since I hadn't actually attempted before to write such a pipeline in C, I gave it a try. I came up with a couple of variations, which I never posted back to the newsgroup.

Recently, another question reminded me of my code. So, rather than let it moulder in my collection of coding bits, I post it here as a reference:

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DIY PBX Chapter 4: An Asterisk is Born

Previously, I had purchased and installed a TDM410P telephony card, and compiled, installed and configured the drivers that went with it. But my DIY PBX cannot consist of just a telephony interface card; without a PBX application, you can't even get a dialtone. I need a PBX application to manage and drive it all.

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DIY PBX Chapter 3: Come to DAHDI

So, I physically installed the TDM410P telephony card, and now I needed to install some device drivers to run it. And, here I got into the fun stuff: software. This TDM410P clone card came with little documentation, and no software of any kind, so I had to find the driver source code, compile it, install it, configure it, load it and use it.

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DIY PBX Chapter 2: Got hardware?

Telephony slowly moves from the Alexander Graham Bell, two copper wires leading to the house stage of it's life into the more flexible, more portable over the internet, in my pocket stage. And I, even more slowly, move with it. I still want a home phone, and I want to tinker, and I have nothing better to do.

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DIY PBX Chapter 1: The bright idea

As you may know, for the last five years, I've used an IP04 as my home PBX. This device has served me well; in that time adaptively blocking over 900 unwanted calls while permitting friends and family to call me, even when I have travelled.

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