Does the xbee reset pin (5) reset the baud rate to the default value of 9600? If not, how do you enter the AT mode (+++) if you do not know the baud rate? Do you need to cycle through all baud rates until you get the “OK”?
No, reset just reset the module. It does not Restore the module.
If you hold the DI/CONFIG line low on power up or reset, the module will enter command mode at the default baud rate of 9600 bps.