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By Jim Van Meggelen; Jared Smith; Leif Madsen

ISBN-10: 0596522290

ISBN-13: 9780596522292

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It looked like a telephone and acted like a telephone, and therefore it was a telephone. You will still occasionally find PBX sets referred to as terminals, but for the most part they are called telephones. † OK, so you think you know what a phone call is? So did we. Let’s just wait a few years, shall we? 164 is the ITU standard that defines how phone numbers are assigned. 164 addressing. Types of Phones | 33 The renewed relevance of the term communications terminal has nothing to do with anything proprietary—rather, it’s the opposite.

Having devices on the bus that interfere with this process will result in degradation of call quality. Chipsets from Intel (for Intel CPUs) and nVidia nForce (for AMD CPUs) seem to score the best marks in this area. Review the specific chipset of any motherboard you are evaluating to ensure that it does not have known problems with IRQ latency. • If you are running Zaptel cards in your system, you will want to ensure that your BIOS allows you maximum control over IRQ assignment. As a rule, high-end motherboards will offer far greater flexibility with respect to BIOS tweaking; valuepriced boards will generally offer very little control.

However, don’t be too quick to buy the most expensive CPU out there. You’ll need to keep the requirements of your system in mind; after all, a Formula 1 Ferrari is ill-suited to the rigors of rush-hour traffic. Slower CPUs will often run cooler and, thus, you might be able to build a lower-powered, fanless Asterisk system for a small office, which could work well in a dusty environment, perhaps. In order to attempt to provide a frame of reference from which we can contemplate our platform decision, we have chosen to define three sizes of Asterisk systems: small, medium, and large.

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Asterisk by Jim Van Meggelen; Jared Smith; Leif Madsen


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