18.6. DFNN - Use default node number for trunk as a dummy source
node number 
Feature:
Display modification, prevention of network loops
Function:
The DFNN COT parameter causes the dummy node number assigned to the trunk with the
AMO TACSU or TDCSU to be used as the source node number for the coming display modification.
It prevents the reconstruction of source node numbers from numbers such as Calling
Number,
Connected Number, Redirecting Number, Redirection Number, etc. by means of dial analyses.
In
the case of outgoing display modification, the parameter DFNN has no effect. The node
numbers assigned to the numbers are transferred.
AMO Interrelationships:
TACSU ... <node no>
TDCSU ... <node no>
IMPORTANT:
If the LWCN and DFNN are set at the same time, then DFNN deactivates
the function of LWCN in the incoming direction, but not in the outgoing direction.
Device types:
Analog and networking trunks
Protocol variants:
All protocols