Im hoping to obtain some help as i have been tasked with a project for work including an arduino system and have to purchase the arduino units before i begin the project to allow for lead times.
My project is the remote control of an ISDN unit over satellite modems(analogue audio) with DTMF tones and arduino.
I have identified the MT8880 IC as the DTMF transiever on both sides and need only to specify and buy the arduino types i will require but as i have not yet touched an arduino this seems quite tricky.
If i supply a list of pre requisites and a brief system diagram can i grab some recommendations for arduino boards?
Arduino unit 1- data connectivity to MT8880 IC for recieving/transmitting DTMF code information.
- connection to an LCD display for feed back from the other side of the satellite link
- connection for a 4 x 4 keypad (numbers 1-9, * and #, A B C D
Arduino unit 2- data connectivity to MT8880 IC for RX/TX DTMF code info
- RS232 serial connection for control of the C500xr ISDN unit.
- connection to the PD25 unit for an automatic (timed) disconnect command should the link be lost.
Any recommendations for the units i should purchase would be very much appreciated.