I use CM4.2(1) and as5400xm with h.323 procotol and i have multitennant company that use multiple E1 on as5400xm so i use routelist prefix to add to number when send to router. and router match dial-peer destination pattern with prefix number.the pro...

if i set unity to greeting and transfer to extension 2101 ,how to set unity or callmanager to check that if 2101 is busy it will backward to unity and anouncement to pstn-user that "right now it's not available, please wait for another contact", and ...