We have already configured a Asterisk 13.6.0 with FreePBX 188.8.131.52 in a Ubuntu 14.04.3 LTS (cloud server in Linode) but we need to finish setting some things like the following:
-The biggest current problem we want to solve is that external calls are working properly, now sometimes when we make a call to the external number the other person listens to us but we can not do it and sometimes it happens the other way around, so we researched and apparently the best solution is to configure the NAT of our asterisk or maybe some other solucion would be to configure a server STUN or ICE
-Fax Configuration (spandsp)
-Queue configuration as completely as possible.
-Setting times and schedules (work time and time off work) a Time Conditions.
-We also need to configure the application in a good way GS Wave (IP telephony application), currently this does not work very well, very stuck listening.
-Service "Do Not Disturb": To display as no connected if someone calls us, but we can make calls.
-Call groups: to ring all phones in a group when someone calls, or to ring sequentially in order, etc.
-Pickup calls from any telephone or just from some specific telephone.
-Check how to call forwarding, call waiting with single key combination, for example to do with the cordless phone
These are the task in order of importance that we need to solve.