Post by thread:[OT]: cheapo switch board.

I need a way to achieve a cheap and simple switch board. eg some way to simulate the dial tone etc with three phones connected together on this network. It is for school kids to learn how to call 911 without connecting to the real network. Does anyone know available chip sets or set-up ? TIA -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

I need a way to achieve a cheap and simple switch board. eg some way to simulate the dial tone etc with three phones connected together on this network. It is for school kids to learn how to call 911 without connecting to the real network. There are certainly "telephone line simulators that will do this (see http://www.teltone.com/ Look for TLS-4.) But you said cheap. Oops. (MSRP ~$800.) My daughter has a toy phone that looks relatively real. It answers (ISD-style recorded voice) to 911 ("911. What is the emergency", or something like that), and also on a programmable number with a recordable message (ie your phone number, and "Hello, this is daddy.") I can't find it at the moment, and don't remember the brand, though. (this sort of thing is well within the capabilities of a PIC+ISD, of course, but it doesn't use real phones and doesn't have interactive capability.) BillW -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads