On Feb 7, 2006, at 10:36 AM, Randall Nortman wrote:
I apologize that this has nothing to do with gEDA, but you folks have been very helpful with this sort of question before. I would like to add a modem capability (telephone line, not broadband) to my embedded microcontroller device. I could connect an external modem to a serial port, but that's an expensive and bulky solution. I'm sure there are chipsets out there for doing this sort of thing -- just a chip that talks to a UART (or I2C/SPI) on one side and talks to the phone line on the other, and handles as much of the dialing and negotiation process on its own as possible. Preferrably, it would require a minimum of external components, and be cheap. I'm not particularly concerned about speed, though 24kbps or better would be good. Through-hole or SMT is fine. Any ideas?
I know Rockwell makes one, and Cermetek has made encapsulated modem modules for years but I've not seen either of them for quite a while. The one that jumps out at me right now is the modem line from Zilog. More info can be found here:
http://www.zilog.com/products/family.asp?fam=206 -Dave -- Dave McGuire Cape Coral, FL