Download PDF by Flavio E. Goncalves: Building Telephony Systems with OpenSER: A step-by-step

By Flavio E. Goncalves

ISBN-10: 1847193730

ISBN-13: 9781847193735

This booklet teaches how you can boost a quick and versatile consultation Initiation Protocol (SIP) server utilizing OpenSER and exhibits how OpenSER can be utilized to enforce beneficial properties now not on hand in Asterisk PBX. This e-book is for readers who are looking to know the way to construct a SIP supplier from scratch utilizing OpenSER. Telephony and Linux event may be invaluable yet isn't really crucial. Readers don't need to have past wisdom of OpenSER.

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PSTN Gateway To communicate to the public switched telephone network, a PSTN gateway is required. Usually this gateway will interface to the PSTN using E1 or T1 trunks. The most common products in this arena are gateways from Cisco, AudioCodes, and Quintum. Asterisk is gaining market in this area, because of its price per port cost, sometimes 75% less than the competitors. To evaluate a good gateway, check the support of SIP extensions such as RFC3515 (REFER), RFC3891 (Replaces), and RFC3892 (Referred by).

It also contains a parameter called branch that identifies this transaction. The VIA header defines the last SIP hop as IP, transport, and transaction-specific parameters. VIA is used exclusively for routing back the replies. Each proxy adds an additional VIA header. It is a lot easier for replies to find the route back using the VIA header, than to go again to the location server or DNS. com) to the destination originally selected. The TO header field is not used to route the packets. com) that indicate the caller ID.

Org. The following packages are required to compile OpenSER. • • • • • • gcc bison or yacc (Berkley yacc) flex GNU make GNU tar GNU install Some modules such as MYSQL, POSTGRES, RADIUS, and others will require additional packages to compile. They will be presented in their respective chapters. 0 installed. 0_r0/i386/ Warning The instruction for this lab formats the computer. Back up all the data before proceeding or run in some virtual machine such as VMware or XEN. 0 CD. Press ENTER to start the installation.

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Building Telephony Systems with OpenSER: A step-by-step guide to building a high performance Telephony System by Flavio E. Goncalves

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