I've learned a lot of information from thread690-1452562 as of Feb. 08. We are in a process of planning an upgrade from ACM1.3 (S8700) to ACM4.x. We currently use MAP-D TN801BV5 (LAN-gateway interface) with Avaya CT 1.3 servers to run our CTI applications (i.e screen-pop, call monitoring, etc.). Based on the discussion in the above thread, we should be OK after we upgrade to ACM4.X as far as our CTI applications are concerned. But one of our vendor support engineers suggested that we replace TN801B with TN802B which confused me a bit. I looked up the Avaya hardware document, TN802B is primarily used as IP media processor and it is replaced with TN2302AP IP media processor which functions deferently than TN801B MAP-D. I'd appreciate it if you would provide a clarification or confirmation on this. Thanks in advance!