serial port sniffer?



not sure if this is the correct place to ask this, but here goes. is there such a program where i can sniff the data that is being sent to a serial modem? i'm writing an app in realbasic and can find the serial ports for a phone when i connect it via usb. but i wanted a way to see the data that is being sent. i've found programs for windows, but unable to find one for mac. any one know of any? thanks!