By John Alexander
Exposes the internal workings of Cisco CallManager that will help you maximize your Cisco IP Communications resolution* learn new content material on QSIG, SIP trunks, video aid, hunt lists and line teams, time-of-day routing, and new gains further in CallManager releases 3.2, 3.3, 3.4, 4.0, and 4.1* overview content material from the 1st version that has been totally revised and up to date to CallManager free up 4.1* the best way to install and deal with a CallManager answer* comprehend the elements that make up CallManager name routing by using easy to complicated examples that resolve firm name routing difficulties* achieve an entire knowing of ways CallManager manages media assets and procedures details for conferencing, transcoding, annunciation, and extra* study targeted information regarding North American and overseas dial plans, trunk and station units, media assets, and lots more and plenty moreCisco CallManager basics, moment version, presents examples and reference information regarding CiscoR CallManager, the call-processing portion of the Cisco IP Communications resolution. Cisco CallManager basics makes use of examples and architectural descriptions to give an explanation for how CallManager methods calls. This booklet info the internal workings of CallManager in order that these accountable for designing and preserving a Voice over IP (VoIP) answer from Cisco SystemsR can comprehend the position each one part performs and the way they interrelate.This booklet is the fitting source to complement your realizing of CallManager. you are going to examine distinct information regarding dial plan administration and speak to routing, and software program elements, media processing, name element documents, method administration and tracking, and the heritage of CallManager. The authors, all contributors of the unique group that constructed and carried out the CallManager software program and documentation from its early phases, additionally offer a listing of positive factors and Cisco options that combine with CallManager.
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Extra resources for Cisco CallManager Fundamentals
Furthermore, because SDL is specifically designed for the modeling of real-time behavior, it is extremely suitable for call processing software. 51. Each Multimedia Manager server served only as a call signaling source and destination. 0 managed connections by sending commands to network hubs, which contained the matrix for the video connections. Each hub contained 12 hybrid Ethernet/time-division multiplexing (TDM) ports. Each port could serve either a PC running videoconferencing software or a subhub that managed four PRI interfaces for calls across the public network.
Thus, to the users and the administrators, the individual nodes in the cluster appear as one large telephone system, even if your users reside in completely different geographical regions. CallManager cluster members do not need to be co-resident. In fact, geographically separating the cluster members can provide even greater device survivability. If a disaster occurs in one geographic site (if, for instance, the CallManager system administrator receives one too many special executive requests and takes a fire ax to the Media Convergence Servers), nodes in other geographic sites can take over the phones.
The Media Control Layer coordinates all the media connections. The Call Control layer handles the basic call processing of the system. It locates the destination that a caller dials and coordinates the Media Control, Aggregator, and Protocol Layers. Furthermore, it provides the primitives that the Supplementary Service Layer uses to relate independent calls. The Supplementary Service Layer relates independent calls together as part of user-requested features such as transfer, conference, and call forwarding.