1-14 Chapter 1: 7401-2xxx and 3xxx Product OverviewThe wireless networks operate at speeds of 1-2 MB/s with 2 percentpacket loss typical. The application developer must be aware of theperformance limitations and design applications that are acceptable tothe customer when run over the slower network.Remote Wakeup over the wireless network is not possible because thecards do not support it. An alternative is to use the system real-timeclock wake up at a scheduled time.The wired Ethernet connection is not certified for use in configurationswhere a wireless adapter is installed.Universal Serial BusTwo USB Type-A ports are provided on the terminal. USB HostController support is provided in hardware on the Processor Board.Note: Third party USB peripherals require support from the operatingsystem, which is currently limited to Windows 2000 and WindowsXpe. The terminal must use the I/O Networks drivers to support theNCR USB printer and scanner products. These drives are availableunder Windows NT, Windows 2000, and Windows XPe.Serial PortsThe 7401 Release 2.x processor boards provide two RS-232 ports (9-pinD-shell connectors, Ports 1 and 2) directly on the board and supporttwo additional RS-232 ports. Ports 3 and 4 require an optional harnessconnection to the processor board. Ports 1 and 3 can be supplied with+12 V DC on Pin 9 when properly set up in the BIOS. The total powerdrawn by Ports 1 and/or 3 must be no greater than 1 amp at 12 V+ DC.Refer to the following table for RS-232 pin-out information.The BIOS permits flexibility in mapping resources. However, a fully-loaded system (2 PCMCIA cards that require IRQs, four serial ports inuse, USB in use, parallel port in use, and MSR) may not have enoughavailable IRQs to support all serial ports. Use a USB serial portexpander to overcome this PC architecture limitation.Port 2 shares hardware resources with the IRDA connection; if IRDA isin use, Port 3 is not available.
