linux/Documentation/isdn/README.pcbit
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   2 README file for the PCBIT-D Device Driver.
   3------------------------------------------------------------------------------
   4
   5The PCBIT is a Euro ISDN adapter manufactured in Portugal by Octal and
   6developed in cooperation with Portugal Telecom and Inesc.
   7The driver interfaces with the standard kernel isdn facilities
   8originally developed by Fritz Elfert in the isdn4linux project.
   9
  10The common versions of the pcbit board require a firmware that is 
  11distributed (and copyrighted) by the manufacturer. To load this
  12firmware you need "pcbitctl" available on the standard isdn4k-utils
  13package or in the pcbit package available in:
  14
  15ftp://ftp.di.fc.ul.pt/pub/systems/Linux/isdn
  16
  17Known Limitations:
  18
  19- The board reset procedure is at the moment incorrect and will only
  20allow you to load the firmware after a hard reset.
  21
  22- Only HDLC in B-channels is supported at the moment. There is no
  23current support for X.25 in B or D channels nor LAPD in B
  24channels. The main reason is that these two other protocol modes have,
  25to my knowledge, very little use. If you want to see them implemented
  26*do* send me a mail.
  27
  28- The driver often triggers errors in the board that I and the
  29manufacturer believe to be caused by bugs in the firmware. The current
  30version includes several procedures for error recovery that should
  31allow normal operation. Plans for the future include cooperation with
  32the manufacturer in order to solve this problem.
  33
  34Information/hints/help can be obtained in the linux isdn
  35mailing list (isdn4linux@listserv.isdn4linux.de) or directly from me.
  36
  37regards,
  38  Pedro.
  39                
  40<roque@di.fc.ul.pt>
  41
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