hello Daniel,I Have configured the FXS port on the Voice gateway to attach a fax machine, I did the same for the credit card machine. the FXS port are registered with CUCM. I didn't need the endpoint MAC. In this case the answer may be yes. 

Hey my friend ,Mohamed, Ayodeji and Ross are all right.You may also install VMmare Worstation, then Install ESXi on top of it, and you can then install CUCM the host. (ESXi).regards

Hey,Are you using the build-in conference bridge for transfer and conferencing? If so, that ressource is not always available, and that may explain you issue.Solution:Create a MTP (Media Termination Point) assign it a MRGL like mohamed.helmy said, an...

Hey andrew,I made a switch from jabber to the Cisco unified IP communicator version 8, which has a smaller conversion window, with many other options that Jabber doesn't have and it work great for me(IM, Presence, calls...)Regards

hey danie,have you tried if the "Log missed call " is unchecked? you may change the setting into the line configuration of your phone. I have attached a picture for you.regards