By Daniel Collins
New version OF--CUTTING-EDGE options CUT-TO-THE-CHASE STYLEIn the race to place carrier-quality voice over IP (VoIP)--those utilizing this e-book run swifter and falter much less. foreign specialist Daniel Collins' drastically more desirable service Grade Voice over IP brings you modern signaling schemes, protocol apps, and caliber of provider (QoS) techniques-and extra importantly, the solutions to creating them paintings together.Skipping pointless historical past, chitchat, and math, Collins will get down to strategies with reliable info on protocols' reasons and makes use of. He can provide the latest details with hands-on info, exhibiting you ways to:* Use ITU and IETF protocols to construct next-generation networks* let complex positive factors and prone, together with multiplied SIP assurance* offer wireline-quality carrier with source reservation schemes and QoS options, together with the newest info on MPLS advances* conquer obstacles inherent in IP* Seamlessly interwork VoIP structures with conventional telephony networks* layout real-world VoIP networks (new chapter)* Pull the items jointly right into a approach that works-and doesn't breakComplete with various particular examples of ways the protocols are used and built-in, this just-in-time consultant provides the strategies you must roll out aggressive caliber VoIP.Jumpstart carrier-quality VoIP with aid from foreign specialist Daniel Collins
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Extra resources for Carrier Grade Voice over IP
There are two ways to know this. The easiest is through the use of well-known port numbers. These are port numbers from 0 to 1,023 reserved by the IANA for certain applications. For example, port number 23 is used for TELNET and port number 25 is used for the Simple Mail Transfer Protocol (SMTP, used for e-mail). If a client wants to access a service at a server, and that service is allocated a well-known port number, then that port number will be used as the destination port number. Of course, for a given server, many clients may be trying to access the same type of service.
As with all Internet drafts, it should be read with the understanding that it is a work in progress and subject to change at any time. Table 2-1 and Table 2-2 list the various RTP audio and video payload types respectively defined in the new profile draft. As can be seen from Table 2-1 and Table 2-2, some coding schemes are given a specific payload type number. These are known as static payload types. Other payload types are marked Dyn, meaning dynamic, and are not allocated any specific payload type number.