Actually, I had the impression that Address Book.app did not open the port in an exclusive mode, because I can use, say, ZTerm on the port while Address Book.app is listening to incoming calls on the bluetooth phone. That's why I was wondering if there was a way to open multiple serial connections with a bluetooth device... But Eric Brown says that there is a single RFCOMM channel... so why do I see RING messages in the ZTerm window while also getting incoming call messages from Address Book.app? If I look at Address Book.app's communication with my T68i by using PacketDecoder2, I can see it actually gets incoming call notifications through the standard AT command set and unsolicited responses... (by the way, where are constants such as TIOCEXCL documented?) Thanks! Alberto. At 10:25 AM -0700 10/9/02, Eric Welch wrote: Exclusive use of a Bluetooth serial port is more a POSIX issue than a Bluetooth issue. Consider #include <ttycom.h> ioctl(fd, TIOCEXCL, 0); after you open the port. That should prevent anyone else from being able to get it. _______________________________________________ bluetooth-dev mailing list | bluetooth-dev@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/bluetooth-dev Do not post admin requests to the list. They will be ignored.