Avaya 555-245-600 COIs for multiple-site networks, Network of Avaya systems and system sites

Call usage rates

In general, one may choose to expand a COI matrix in any of several different possible ways, depending upon the needs of the problem. In the preceding example, separating the endpoints into IP, circuit-switched, and PSTN makes sense for the upcoming resource-sizing calculations, as will be seen later in this document. In other examples, other sets of categories may be more appropriate. Also, the number of categories per site is not limited to three.

COIs for multiple-site networks

The discussion of COIs up to this point has been limited to stand-alone Communication Manager systems. It is also possible to network several Communication Manager systems together. IP tie trunks serve as the most common mode of interconnectivity. However, circuit-switched tie trunks are also supported.

To engineer a network of multiple Communication Manager systems, one must to know the topology of sites within each of the individual systems, and the overall topology of the entire configuration. Consider the network of systems that Figure 64: Network of Avaya systems and system sites on page 197 shows.

Figure 64: Network of Avaya systems and system sites

Figure 64 shows three distinct Communication Manager systems, that are interconnected by IP trunk groups. This network has a total of seven sites, which are labeled “S1” through “S7” in the figure. Systems 1 and 2 each have two sites, and System 3 has three sites.

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