I've used Cisco systems on an occasion, but I do not understand well of all the terminology used in Cisco IP Telephony/UC. I can get away with the Cisco UCM web GUI, its really on the IOS level where I get very confused very quickly and trying to fig...

All, I'm using a Cisco router running Call Manager Express (if you can't tell its somewhat dated) and would like to set up an FXO trunk to ring into the system and then if no answer, ring to a SIP extension/trunk to the third party SIP voicemail syst...