17.52. NPIS - Numbering Plan ISDN on outgoing trunk calls 
Feature:
This COT describes, that the next node can use numbers in Numbering plan ISDN to reach
this
physical node. In general, this is a indication, that the switches at both ends of
the trunk
use numbering plan ISDN for networking.
Function:
In more detail, is used to determine the NPI for sending redirection parties in case
of set
COT parameter AULN, RWSN, if the NPI can not be determined from the redirection party
itself. E.g. A user B in switch 1 programms an internal CF by entering the extension
of the
redirection number only (normal case). If a user A in switch 2 calls B, networking
must
modify the redirection number in a way, that switch 2 can use this number to reach
B. This
COT defines, what NPI is used to sent the redirection party is from switch 1 to switch
2.
AMO-Interrelationships:
Only one of the 3 COT parameters NPPR,NPIS, NPUN must be set. If none of the 3 COT
parameters is set, the system behaves as if NPUN was set. This COT is only relevant,
if COT
RWSL, AULN set. If incorrectly set: CF is not executed!
Device type:
Applicable to all digital trunks with outgoing calls
Protocol variants:
Applicable to all digital protocols