5.1.7.8. Tie Code 
Another expression for the Route code number (colloquial)
IMPORTANT:
In principle, every node can be dialed in the
network with several code numbers.These codes must then lead to AMO
wabe DAR= OWNNODE. You must, however, add one of these code numbers as
a physical node code number (with AMO ZAND, parameter PNODECD).