OS4X Core - ISDN protocols

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)