Supported Configurations

The 2.1 node supports the full range of station roles:

• Primary DLC stations
• Secondary DLC stations
• DLC station role negotiation

For SDLC (synchronous data link control) connections, the node allows:

• Leased lines configured as:

  Secondary point-to-point.

  Primary point-to-point or multipoint.

  Negotiable point-to-point.

• Switched lines (point-to-point only) with:

  Remote PU identification through XID exchange.

  Auto dial (with suitable hardware support).

  Incoming call support.

For X.25 and 802.2, the node also supports:

• Multiple connections over one physical link.
• Incoming calls with validation of caller's address.

In addition, for X.25, the node supports permanent and switched virtual circuits (PVCs and SVCs).