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 README file for the PCBIT-D Device Driver.

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The PCBIT is a Euro ISDN adapter manufactured in Portugal by Octal and

developed in cooperation with Portugal Telecom and Inesc.

The driver interfaces with the standard kernel isdn facilities

originally developed by Fritz Elfert in the isdn4linux project.

The common versions of the pcbit board require a firmware that is

distributed (and copyrighted) by the manufacturer. To load this

firmware you need "pcbitctl" available on the standard isdn4k-utils

package or in the pcbit package available in:

ftp://ftp.di.fc.ul.pt/pub/systems/Linux/isdn

Known Limitations:

- The board reset proceeding is at the moment incorrect and will only

allow you to load the firmware after a hard reset.

- Only HDLC in B-channels is supported at the moment. There is now

current support to X.25 in B or D channels nor LAPD in B

channels. The main reason is that this two other protocol modes have,

to my knowledge, very little use. If you want to see them implemented

*do* send me a mail.

- The driver often triggers errors in the board that i and the

manufacturer believe to be caused by bugs in the firmware. The current

version includes several proceedings for error recovery that should

allow normal operation. Plans for the future include cooperation with

the manufacturer in order to solve this problems.

Information/hints/help can be obtained in the linux isdn

mailing list (isdn4linux@hub-wue.franken.de) or directly from me.

regards,

  Pedro.