OS4X Core - ISDN protocols

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The ISDN part of OS4X supports the following settings (which are mainly default):

B1 layer

  • 64 kbit/s with HDLC framing
  • (supported for incoming calls: 64 kbit/s bit-transparent operation with byte framing from the network)

B2 layer

  • ISO 7776 (X.75 SLP)

Configuration:

  • Link address A: 0x03 (default)
  • Link address B: 0x01 (default)
  • Modulo mode: 8 (default)
  • Window size: 7 (default)
  • XID: empty (default)

B3 layer

  • ISO 8208 (X.25 DTE-DTE)

Configuration:

  • Lowest incoming channel: 0 (default)
  • Highest incoming channel: 0 (default)
  • Lowest two-way channel: 1 (default)
  • Highest two-way channel: 1 (default)
  • Lowest outgoing channel: 0 (default)
  • Highest outgoing channel: 0 (default)
  • Modulo mode: 8 (default)
  • Window size: 7 (non-default, maximum window size due to external compatibility)
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