jeffphil wrote:We had an extra computer, so we're tinkering with the idea of setting up Asterisk to replace the branch answering machine. We thought we could have it prompt to leave messages in various mail boxes and then e-mail them as attachments to the appropriate leader (the BP, FHC director, mission leader, etc.)
Sounds like a fun project. I have been doing a lot with asterisk lately and the more I use it, the more i am impressed with what it can do. I'm not sure how much looking you've done, but just in case you haven't run across these yet, here are two things that made "tinkering" with asterisk much easier:
Trixbox - this a complete install package - it is an install disk that will set up your linux os (Cent OS - based on red hat) asterisk, all your zaptel drivers and devices (these are hardware cards to interface with traditional phone systems) and ton of support packages for configuring and maintaining asterisk.
voip-info.org - this is a very very useful wiki for anything voip - but especially asterisk.
Also the company that makes asterisk (digium) sells the zaptel devices i mentioned earlier - they are good quality, but somewhat expesive for "tinkering". there are some "clone" cards out there that are not quite as good of quality, but start around $30 for a single FXO (what you would plug your incoming phone line into). I got mine at x100p.com but there are others.
Just some thoughts about your project:
The MTC referal numbers are 1-800 numbers - i believe that most VoIP providers offer free 1800 termination so you could take an incoming call and give them the option to transfer the MTC. Along that same thought, if your current phone provider has 1800 calling card number you could use that to call headquarters while the keeping the phonel line open.
Asterisk can do a lot for you but with only a single phone line in, you will run into a lot of restrictions - for example, if you want to transfer a call to a ward missionary, you would need a second way out of the system as the phone line is already in use. I'm sure you understand this since you were asking for a VoIP connection in the first place. Some kind of voip provider is really the best solution for this.
Good luck - i would be happy to help if i can with any questions as you set up asterisk
-Lincoln