Uniden Data 2000 Wireless CDPD PC Card Guía de usuario descargar pdf (Pagina 31)

• If you are trying to use DHCP to configure your network interface, try testing things with a static IP

address instead, to rule out a DHCP configuration problem.

• To diagnose problems in /etc/pcmcia/network.opts, start by trying to ping other systems on

the same subnet using their IP addresses. Then try to ping your gateway, and then machines on other

subnets. Ping machines by name only after trying these simpler tests.

• Make sure your problem is really a PCMCIA one. It may help to see see if the card works under DOS

with the vendor's drivers. Double check your modifications to the

/etc/pcmcia/network.opts script. Make sure your drop cable, ``T'' jack, terminator, etc are

working.

4.4 PCMCIA serial and modem devices

Linux serial devices are accessed via the /dev/ttyS* and /dev/cua* special device files. In pre−2.2

kernels, the ttyS* devices were for incoming connections, such as directly connected terminals, and the

cua* devices were for outgoing connections, such as modems. Use of cua* devices is deprecated in current

kernels, and ttyS* can be used for all applications. The configuration of a serial device can be examined

and modified with the setserial command.

When a serial or modem card is detected, it will be assigned to the first available serial device slot. This will

usually be /dev/ttyS1 (cua1) or /dev/ttyS2 (cua2), depending on the number of built−in serial

ports. The ttyS* device is the one reported in stab. The default serial device option script,

/etc/pcmcia/serial.opts, will link the device file to /dev/modem as a convenience. For pre−2.2

kernels, the link is made to the cua* device.

Do not try to use /etc/rc.d/rc.serial to configure a PCMCIA modem. This script should only be

used to configure non−removable devices. Modify /etc/pcmcia/serial.opts if you want to do

anything special to set up your modem. Also, do not try to change the IO port and interrupt settings of a serial

device using setserial. This would tell the serial driver to look for the device in a different place, but

would not change how the card's hardware is actually configured. The serial configuration script allows you

to specify other setserial options, as well as whether a line should be added to /etc/inittab for this

port.

The device address passed to serial.opts has three comma−separated fields: the first is the scheme, the

second is the socket number, and the third is the device instance. The device instance may take several values

for cards that support multiple serial ports, but for single−port cards, it will always be 0. If you commonly use

more than one modem, you may want to specify different settings based on socket position, as in:

case "$ADDRESS" in

*,0,*)

# Options for modem in socket 0

LINK=/dev/modem0

;;

*,1,*)

# Options for modem in socket 1

LINK=/dev/modem1

;;

esac

Linux PCMCIA HOWTO

4.4 PCMCIA serial and modem devices 28

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 55 56

Sin comentarios

Uniden Data 2000 Wireless CDPD PC Card Guía de usuario Pagina 31