I have a configuration in the lab right now with a non-Cisco device that can route VoIP calls. Basically, I have two subnets such that in each subnet I have a non-Cisco device to route the phone call. There are two phones (1 on each subnet). The non-Cisco device act as a media gateway for the call. Furthermore, this device can also interleave voice packets from multiple users into a single packet. Doing so allows my system to save ALOT of bandwidth. I am planning to do a similar test on Cisco devices (Call manager, IP phone, etc.). So my question is, do Cisco devices have support to interleave voice packets from different users into a single packet to save bandwidth? My company is currently performing this test to evaluate which product to be deployed on our current system.