Asterisk Installation and Configuration

I have a running faxserver (Centos) in Germany with a PMX, Hylafax and Capifax to send and receive faxes. Now we like to install Asterisk to forward incoming calls and to get an answering machine with forwarding incoming messages by Email. Because this server is running for some hundred incoming faxnumbers, we cannot break the service for a longer time and I have not so much experience about Asterisk to make this with only a short break or to switch back quickly to the running system, if anything does not work. I need: - installation and configuration of Asterix working with Hylafax for incoming and outgoing faxes with a short break of service - checking configuration of Hylafax - configuration of Asterisk as answer machine for specified incoming numbers - prepare of Asterisk to forward incoming calls to external numbers - short instructions to handle answer-machine and call-forwarding ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Centos Linux