For larger configurations in Avaya IX™ Messaging Server, the network requirements specify a 1 Gb/s network connection between Avaya IX™ Messaging and Email servers, along with a 1 Gb/s layer 2-switch between all servers. This specification is considered for configurations with1000+ Unified Communication (UC) users. Such network infrastructure ensures that the system can handle the data throughput and provide reliable service for a large number of users without experiencing network bottlenecks.

References: The user count for larger configuration specifications requiring a 1 Gb/s network connection is detailed in Avaya’s support documentation for Avaya Messaging1.