You'll need to find the wires to the switch, why there are 3 wires instead of two, I unfortunately don't know.
I dont even remember #* though...
For what it is worth, here is a schematic of a typical rotary phone:http://www.freeinfosociety.com/electronics/schemview.php?id=1276
So that can give you a simple hint that the arduino can be made to dial a phone number simply by interfacing to the phone line with a simple relay switch contact.
We did this as a laboratory exercise on the old MMD1 microprocessor trainer. It used an 8080 processor and had a grand total of 256 bytes of RAM (that's bytes, without any prefix) for the program code.
Not sure that all land-line phone companies world wide still support pulse dialing, but they do here in the USA.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16