From Node A (NNO=1-1-10) to Node B (NNO=1-1-100), as well as Node
C (NNO=1-1-800), the connection from Node A is to be possible for all
subscribers. Subscriber A can call B and C, but cannot use the secondary
route in Node B to CO ISDN (NNO=1-1-888) via a tie trunk to Node C (NNO=1-1-800)
- for which the LAUTH 10 is likewise necessary.