Cynthia, I'm very familiar with Rockwell chips and they require the use of World Wide modem chips and firmware to get blacklisting to function. Black listing is no longer limited to European countries, a number of others require it in one form or another.
Black listing does not function in Rockwell North American modem chips and firmware. The domestic firmeware source is available from Rockwell and can be modified to prevent dialing 911 or any other number. I don't know of any domestic modems that inhibit dialing 911. I'm not sure why. What Bernard McEwen is suggesting you to try will not work with Rockwell domestic code. It requires setting up the worldwide modem code by selecting the particular country code that has blacklisting via AT command. Due to the higher cost of worldwide chip sets finding a modem in the U.S. that has blacklisting is highly unlikely. If you need anymore information or a more definitive answer please email the questions or call me at 415-592-1973. Regards, Duane Marcroft Modem, DAA and Telecom Consultant
