[asterisk-users] Need help designing implementation

[Dyweni - Asterisk-Users]

Hi,

I'd like to replace my current VOIP provider with an Asterisk based 
solution.  I have some ideas I want to run by the list to see if they 
are possible, and get answers to a couple questions.

I want to setup two Asterisk servers that are linked to each other:
- The first server would be my "external" (public) server and would 
live in a real data center.  The second server would be my "internal" 
(private) server and would live in my house.
- The external server would receive all incoming calls and handle the 
voice mail stuff.
- The internal server would run all the phones in my house (VOIP or 
Analog-via-FXS).  All outgoing calls would be routed out through the 
external server.

I also want to add the following additional functionality:
- If the external server looses connectivity to the internal server 
while a call is in progress, the external server should place the call 
on hold while it tries to reach us via our cell phones.  A message 
should be played informing the remote party that the connection had been 
lost and it is trying to re-establish it now.  If it can't reach us, it 
should inform the remote party that the connection could not be 
re-established and allow the remote party to leave some closing remarks 
on the voice mail system.

- If a call comes in and no one is at home to take the call (or if all 
lines at home are busy), it should ring all of our cell phones and 
whoever answers the call first gets the call.  If no one answers the 
call via the cell phones after 3 rings, it should route the call to the 
voice mail system.  I say 3 rings on the cell phone because I do not 
want the cell phone voice mail to take the call.

- I also would like the system to automatically route all calls 
directly to voice mail depending on the time of day (say 10PM to 8AM).  
I would like specify in a "white list" specific phone numbers that are 
allowed to ring through regardless of time of day (i.e. her parents, my 
parents).

- I would like the VOIP phones to turn on the voice mail waiting 
indicator light if the external server has new voice messages.


Is all of this possible?  If not, which part's are not (and how much 
work do you think would be needed to make those parts work)?


-- 
Thanks,
Dyweni