Which three requirements must be met for an Avaya IXTM Messaging High Availability installation? (Choose three.)

A. The path of connectivity must have 20 Mb/s guaranteed bandwidth with no steady-state congestion

B. Maximum round-trip latency between the voice servers and the PBX must not exceed 200 milliseconds. Optimal round-trip latency is less than 150 milliseconds

C. Maximum round-trip latency between the voice servers and the consolidated servers must not be more than 50 milliseconds

D. All servers must have a minimum 1 GB/s connection to the network

E. All servers must be part of the same Windows domain

Reference: http://www.esna.com/services/education/IX_Messaging_10_8/TOG/RH5_IXM_TOG/IXM_TOG_System_Requirements/IXM_TOG_System_Requirements.htm