Asterisk 1.4 : the professional's guide : implementing, - download pdf or read online

By Colman Carpenter; Ian Plain; Jared Smith; Philippe Lindheimer; et al

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Additional resources for Asterisk 1.4 : the professional's guide : implementing, administering, and consulting on commercial IP telephony solutions

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Even worse is the fact that any active calls will be dropped unceremoniously. Don't forget also that your Asterisk system is going to place new demands on the bandwidth of your customer's network, both internally and on the route(s) to the Internet. Com This material is copyright and is licensed for the sole use by Anna Indahl on 12th August 2009 PSC 94 Box 361, , APO, , 09824 Chapter 2 the voice traffic will determine your overall bandwidth requirements, and it is quite typical for these decisions to be informed by the currently available bandwidth, and of course the cost of improving either its capacity and/or quality if required.

There are many factors that can influence latency including processor speed, available memory, disk spindle speed, and so on. However, in virtually all hosted installations communication circuits is the defining factor. When there is a limited amount of latency that a commercial system can bear, choosing the most appropriate circuit provider is vital. In fact, choosing a circuit with low latency is arguably even more important than reliability, as it is easier to introduce redundancy to communications circuits based on availability (if circuit A is down switch to circuit B) than it is based on latency (if circuit A is showing high latency switch to circuit B).

A centralized installation (sometimes called a "System" installation) is where there is a physical installation of Asterisk onsite, and by that we mean connections from the phone are on a high speed network (Cat5 and so on) where bandwidth and latency should not be an issue. A distributed, or hosted installation, is where the end user is using a remote server to handle the PBX functions. Typically, such installations have a small number of IP phones/adapters onsite, for instance where a small remote office is required to connect to the company's centralized PBX installation.

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