- Gratuit : téléchargez l'application Amazon pour iPhone, iPad, Android ou Windows Phone ou découvrez la nouvelle application Amazon pour Tablette Android !
- Publiez votre livre sur Kindle Direct Publishing en format papier ou numérique : C'est simple et gratuit et vous pourrez toucher des millions de lecteurs. En savoir plus ici .
- Plus de 10 000 ebooks indés à moins de 3 euros à télécharger en moins de 60 secondes .
SIP Beyond VoIP: The Next Step in the IP Communications Revolution (Anglais) Broché
Offres spéciales et liens associés
Descriptions du produit
Aucun appareil Kindle n'est requis. Téléchargez l'une des applis Kindle gratuites et commencez à lire les livres Kindle sur votre smartphone, tablette ou ordinateur.
Pour obtenir l'appli gratuite, saisissez votre adresse e-mail ou numéro de téléphone mobile.
Détails sur le produit
En savoir plus sur l'auteur
Commentaires en ligne
Commentaires client les plus utiles sur Amazon.com (beta)
The authors' discussion of SIP is competent, but not remarkable. There are better descriptions available from other authors (e.g. "IP Telephony: Deploying Voice-over-IP Protocols", Hersent et. al, ISBN 0470023597). When the authors talk about current SIP usage, they seem woefully out of touch. For example, they never once mention the open source SIP-based PBX software Asterisk, even though the book has a section on open source software. Asterisk has been a force of nature in the VoIP world since 2004. You'd have to be in a very high ivory tower to miss that.
Much of the book is a rehash of stuff you can read in the SIP RFCs. Sometimes the authors make simple things unclear, as when they say "A SIP transaction consists of a request and a final response." What about the intermediate 1xx responses? Aren't they part of the SIP transaction? The RFC says they are.
Other times the authors express puzzling opinions, such as "[We] believe the IP-PSTN telephony model does not qualify as true VoIP either." What, then, do you call the VoIP services sold by the likes of AT&T, Covad, Sunrocket, and Vonage offering cheap local and long distance phone service to PSTN destinations? I stand perplexed.
When the authors do roll up their sleeves to talk tech, they write a few intriguing paragraphs about a topic and then inexplicably stop, switching gears to the next subject. For example, the discussion on PSTN interactions begins to explain how early media, ringback and other in-band signalling works, then suddenly stops the discussion. Yes, one can scour the Internet for such information, but it would be nice for the authors to simply explain each topic to a consistent level of detail. If they aren't going to talk about things Beyond VoIP, as originally promised, they can at least give readers consistent depth of coverage.
All three authors have impecable credentials, each with a track record in the field and deep involvement in SIP's development. Beyond the misleading title, I expected more quantity and quality from these three experts.
A note on Amazon reviews. Whenever I see a five-star review I always check to see the reviewer's other reviews. It's amazing how often they have none.
For SIP engineers, the book is an excellent, very good structured guide through the SIP protocol and its, meanwhile, quite numerous extensions, from basic SIP to SIP-based Presence, Location, Conferencing and Identity services and to the currently emerging peer-to-peer SIP technology. For each topic, the book contains the functional architecture description, the most important protocol aspects and examples. For readers interested to get more technical details, the book also refers, for each topic, to the relevant IETF SIP documents, which are free available at [...]
For product managers, the book is a very good overview on the technical possibilities offered by the SIP technology to build new, innovative services, to offer secure VoIP services or to reduce the costs of the SIP infrastructure using an adequate architecture.
What I particularly credit the book for is it shows the whole SIP roadmap beginning with current status (basics of the sip protocol, sip services, presence, etc.) both deployment-wise and standardization-wise, work-in-progress in the industry (xcon conferencing,xcap provisioning), and ending with 'hot topics' such as peer-2-peer, interconnection of 'sip islands' and multi-network mobility. Even very tricky aspects such as NAT traversal have been addressed in this single book. The presented concepts are well provided with underlying details such as traces of SIP messages, call-flows and snapshots of devices in the market. Despite I consider my own SIP knowledge level over-average, I like to refer to the book for SIP aspects I don't deal with every day. With that, this book is a must-have for bookshelf of anyone who is seriously looking at SIP.
A must read for software developers, solution implementers as well as business decision makers.