5.20.3. Service Information 
- In each physical network an unambigous node number and an umambigous
code for the Route Optimization feature must be assigned by means of
AMO ZAND, parameters PNNO and PNODECD (Method 1).
- Each route must be assigned a virtual destination node number by
means of AMO RICHT, parameter NODENO (Method 1,3).
- Incoming digital circuits of nodes up to and including Hicom 300
V3.2 and analog circuits must be assigned a fictitious virtual node number
by means of AMO TDCSU, AMO TACSU, parameter ORNDNO and activated
via the COT parameter DFNN/LWNC (Method 1,2).
- For incoming digital circuits of nodes up to and including Hicom
300 V3.2 a class of trunk must be created with AMO COT, parameter COTPAR=
LWNC, and assigned to the circuits with AMO TDCSU, parameter COTNO
(Method 1, 3).
- Incoming digital circuits must be assigned TRANSIT-COUNTER threshold
values by means of AMO TDCSU, parameter TRACOUT. The TRANSIT-COUNTER
check must be activated by means of AMO COT, parameter COTPAR=ATRS. This
value is always applicable to all circuits in a trunk group (Method 2).
- Incoming digital circuits of Hicom 300 V3.3 nodes must be assigned
the value CORNV33 or a an appropriate protocol in new variants
such as QSIG, by means of AMO TDCSU, parameter PROTVAR, in order
to ensure transmission of the node numbers in the network protocol (Method
1, 2, 3).
- If the default value is insufficient, the prevention function can
be extended by means of AMO DIMSU, parameter RSTCON (Method 1).
- The traffic restrictions of the node connecting matrix can be removed
for the attendant console (AC) by means of AMO ZAND, TYPE=ATND, parameter
ACCHECK (Method 1).