IP Telephony, Second Edition by Olivier Hersent(auth.)

By Olivier Hersent(auth.)

All you must learn about deploying VoIP protocols in a single complete and hugely sensible reference - Now up-to-date with assurance on SIP and the IMS infrastructure

This publication offers a entire and sensible evaluate of the know-how in the back of net Telephony (IP), supplying crucial info to community Engineers, Designers, and executives who have to comprehend the protocols. in addition, the writer explores the problems keen on the migration of present telephony infrastructure to an IP - established genuine time conversation provider. Assuming a operating wisdom of IP and networking, it addresses the technical features of real-time purposes over IP. Drawing on his wide study and functional improvement adventure in VoIP from its earliest levels, the writer offers an available connection with all of the appropriate criteria and state of the art suggestions in one resource.

Key Features:

  • Updated with a bankruptcy on SIP and the IMS infrastructure
  • Covers the entire significant VoIP protocols – SIP, H323 and MGCP
  • Includes a wide part on functional deployment concerns gleaned from the authors’ personal event
  • Chapter at the intent for IP telephony and outline of the technical and company drivers for transitioning to all IP networks

This e-book could be a beneficial consultant for pro community engineers, designers and bosses, choice makers and undertaking managers overseeing VoIP implementations, industry analysts, and experts. complicated undergraduate and graduate scholars project data/voice/multimedia communications classes also will locate this e-book of interest.

Olivier Hersent based NetCentrex, a number one supplier of VoIP infrastructure for carrier companies, then grew to become CTO of Comverse after the purchase of NetCentrex. He now manages Actility, supplier of IMS dependent M2M and smartgrid infrastructure and applications.

Chapter 1 Multimedia over Packet (pages 1–48):
Chapter 2 H.323: Packet?Based Multimedia Communications structures (pages 49–157):
Chapter three The consultation Initiation Protocol (SIP) (pages 159–268):
Chapter four The 3GPP IP Multimedia Subsystem (IMS) structure (pages 269–311):
Chapter five The Media Gateway to Media Controller Protocol (MGCP) (pages 313–366):
Chapter 6 complicated subject matters: name Redirection (pages 367–391):
Chapter 7 complex subject matters: NAT Traversal (pages 393–416):

Show description

Read or Download IP Telephony, Second Edition PDF

Best protocols & apis books

Deploying Secure 802.11 Wireless Networks with Microsoft Windows

Get in-depth technical information to aid maximize safeguard for instant networking infrastructures for pcs operating home windows XP, home windows Server 2003, or home windows 2000. The ebook completely info how one can enforce IEEE 802. 11b instant LAN networking and its similar authentication applied sciences for a home windows setting.

Virtualization For Dummies

Virtualization has develop into a “megatrend”—and for strong cause. enforcing virtualization allows extra effective usage of community server potential, easier garage management, diminished strength expenditures, and higher use of company capital. In different phrases: virtualization is helping you get monetary savings, strength, and area.

Professional Microsoft Sharepoint 2007 Workflow Programming

Expert Microsoft SharePoint 2007 Workflow Programming . SharePoint 2007 presents both
workflow and task builders with wealthy workflow programming amenities, which permit them to
implement and set up their very own customized SharePoint workflows and activities.
This publication provides a number of particular step - by way of - step recipes for constructing and deploying SharePoint
workflows and actions, and various genuine - international examples during which those recipes are used. This book
uses an strategy in keeping with research of specific code and in - intensity technical discussions that will help you gain
the talents, wisdom, and adventure you want to enhance and set up your personal customized SharePoint
workflows and activities.

Introduction to Networking with Network+

Creation to Networking with community + is the cornerstone for  your networking curriculum. it's equipped round the new  Network+ 2012 framework. it really is dependent upon the CompTIA  Network+ certification and covers the latest examination  objectives.   Are you bored with books that conceal new applied sciences and examination  topics in a fleeting style, and are slowed down with legacy  technology assurance that's now out-dated?

Extra info for IP Telephony, Second Edition

Example text

The main advantage of statistical multiplexing is that it allows the bandwidth to be used more efficiently, especially when there are many conversations multiplexed on the same line (see companion book, Beyond VoIP protocols Chapter 5 for more details). But statistical multiplexing, as the name suggests, introduces uncertainty in the network. As just mentioned, in the case of TDM a delay of up to 125 μs could be introduced at each switch; this delay is constant throughout the conversation. 4): if the transmission line is empty when you need to send a chunk of data, it will go through immediately.

This is where it becomes tricky, because each RTP packet has an IP header of 20 octets, a UDP header of 8 octets, and an RTP header of 12 octets! 6-kbit/s overhead—much more than the actual bitrate of most narrow-band codecs! Therefore, most implementations choose to send multiple frames per packet, and the real frame length is in fact the sum of all frames stacked in a single IP packet. This is limited by echo and interactivity issues (see companion book, Chapter 3 Beyond VoIP Protocols). A maximum of 120 ms of encoded voice should be sent in each IP packet.

1 RTCP packet types There are various types of RTCP messages defined for each type of information: • SR: sender reports contain transmission and reception information for active senders. • RR: receiver reports contain reception information for listeners who are not also active senders. • SDES: source description describes various parameters relating to the source, including the name of the sender (CNAME). • BYE: sent by a participant when he leaves the conference. • APP: functions specific to an application.

Download PDF sample

Rated 4.09 of 5 – based on 25 votes