Communication between Two TSAF Collections

Figure 1 illustrates an example that is similar to Figure 1, except this time AVS and VTAM connect two TSAF collections (each made up of one z/VM system) in the SNA network.
Figure 1. Communication between Two TSAF Collections
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For example, suppose you have a program running in a TSAF collection, and that TSAF collection is part of an SNA network. Your program requests data, using APPC/VM, from a database. The database manager program is located in a different TSAF collection in the SNA network. When your program requests data from the database, the request goes to AVS, where it is transformed from APPC/VM to APPC/VTAM. The request then passes over the path established by VTAM to the second TSAF collection. AVS in the second collection translates the request from APPC/VTAM to APPC/VM. TSAF then passes the request to the database manager program. (The request is not routed through TSAF virtual machines, because AVS is located in the same system as the database manager.) The database manager program gets the requested data and then, through APPC/VM, sends it back to your program.