More info needed.

If the P2P T1 is set up as straight tie lines, then yeah. All you gotta do is (effectively) go offhook and send the Magix the station's digits. If programmed, the Merlin Messaging will pick up.

For extensions on the CallManager side, you'd have to build an equivalent "phantom", adjunct, DGC or whatever--something that the Merlin can route to for call coverage.

The question is, can you set up CallManager to do that? So let's say there's an x200 and x201 on the Cisco side. What happens when 200 calls 201 and 201 doesn't answer? Do you have a way to tell CallManager to seize a tie line trunk and effectively transfer the live call from x200 across it and preface the transfer with the digits "201"? If so, then you've got it made. But it sounds like a pretty tall order to me.

I've got another idea cooking, but I'd like to hear more about how you intend for this thing to work. For example, will there be people on both the Magix side as well as the Cisco side--the idea being that everyone will ultimately migrate to Cisco? If so, whadda ya plan to do for voicemail once everyone is on Cisco? Or is the idea that everyone loves Merlin Messaging and you're hoping that you can just keep that part?

I'm curious too as to why MWI aren't important.

"Press play and record at the same time" -- Tim Alberstein