Asterisk / FSK / Bell 202

my company have a FSK / Bell 202 type of phone and intend to use asterisk TDM to do authentication and also over SIP brief call flow is as follows; 1. FSK phone calls to server 2. Server pick up the phone and send CAS 3. phone receive CAS and sends a DTMF A 4. server receive DTMF A and sends FKS messages "xxxxxx <DATETIME> Datetime format is DDMMYY HHMMSS [login to view URL] receives FSK message and sends card ID info via FSK data burst. Immediately sends DTMF "D", pause for 100ms and sends DTMF "1" or DTMF "2" 6. server Receives FSK data burst, verify card info and sends CAS tone to confirm successful card verification. 7. phone Receives CAS, sends DTMF "A", receiver and microphone remain muted and keypad remains disabled 8. Server receives DTMF "A" and sends the next FSK message "Balance=$[login to view URL]" 9. Phone receives FSK message and displays received message. Enables keypad, unmutes receiver and microphone. User enters phone number. phone displays digits entered and sendskeypad entries via DTMF. 10. Server receives phone number as DTMF tone and forwards call to "B" party. 11. Start conversation 12. Server monitor call and decrement balance. If balance is $0.50, server sends message "Balance is $0.50". If B party disconnects, server sends ADSI disconnect (0x85). Server disconnects. 13. End conversation and Onhook please note that asterisk will be sitting in the middle between the phone and the main server. Asterisk only functions as a bridge to FSK phone and the sever and asterisk does not perform any billing or cdr. FKS phone must be able to communication thru SIP using the above call flow. thanks ## 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 Linux / asterisk