A small Metasys network site comprises a single NAE or multiple NAEs and SNEs with one of the NAEs designated as the Site Director (Figure 1). See Site Director for additional information on Site Director hierarchy and the number of network engines a Site Director can supervise.
Larger Metasys network sites can comprise multiple NAEs and one or more ADSs or ADXs with access to multiple remote sites. On any site with one or more ADSs/ADXs, an ADS/ADX is designated as the Site Director. Figure 2 shows an example of a simple Metasys network with one SNE, one NAE55, and an ADS as the Site Director.
For customers that require a highly secure system, one or more NAE-S network engines can be part of the Metasys network. Figure 3 shows a network that features a secure NAE-S network engine with other unencrypted NAE engines reporting to an ADS/ADX Site Director. For more details, refer to the NAE-S Commissioning Guide (LIT-12012269) .