Written by a dCAP, the "Configuration Guide for Asterisk PBX" is ready for the version 1.4 of Asterisk, but why another Asterisk e-Book? There are several Asterisk books and e-Books in the market. The difference found in our book is that we have created a self-learning material. It has a sequence, objectives, linking and is practical, full of examples.

Escrito por un dCAP, el “Guía de la Configuración para Asterisk esta listo para la versión 1.4 del Asterisk PBX ¿pero por qué otro libro para Asterisk? Hay varios libros y e-Books de Asterisk en el mercado. La diferencia encontrará en nuestro libro es que hemos creado un material autodidáctico. Tiene una secuencia, objetivos y es práctico, con muchos ejemplos.

Escrito por um dCAP (Digium Certified Asterisk Professional)o guia de configuração para o Asterisk é um dos materiais mais novos sobreo assunto, mas porque outro livro sobre o Asterisk? Existem diversos livros e e-Books no mercado. A diferença encontrada no nosso e-Book é que criamos um material para auto-aprendizado. Ele tem uma seqüência, os capítulos são ligados uns nos outros e é cheio de exemplos práticos.

OpenSER is a flexible, free open-source VoIP server based on the Session Initiation Protocol (SIP), an application-layer control (or signaling) protocol for creating, modifying, and terminating sessions with one or more participants, including internet telephone calls, multimedia distribution, and multimedia conferences.

Engineered to power IP telephony infrastructures up to large scale, OpenSER is written in pure C for Linux/Unix-like systems with architecture-specific optimizations to offer high performance; it is able to handle 4 million users on a single processor server. The server keeps track of users, sets up VoIP sessions, relays instant messages, and creates space for new plug-in applications.

It can be used on systems with limited resources as well as on carrier-grade servers, scaling to up to thousands call setups per second. It is customizable, being able to feature as fast load balancer; SIP server flavors: registrar, location server, proxy server, redirect server; gateway to SMS/XMPP; or advanced VoIP application server.

The book is available for pre-order at the Packt website