17.17. CUG - Release Closed User Groups network-wide 
Feature:
Closed User Groups CUG
Function:
An incoming CUG CALL is only rerouted to a partner node if the CUG-related tests have
a
positive result for the CUG index, for the network identity number and for the interlock
code and the trunk to be seized for the external connection setup has corresponding
properties.
Parameter CUG must be set in the COT of the trunk to be seized and the administered
trunk
protocol must be able to transport the CUG service.
Even if the trunk protocol can transport the CUG service, the CUG call is rejected
if the
CUG parameter is not set on the outgoing trunk to be seized.
AMO Interrelationships:
ZAND branch DOMAIN
DOMTYPE: Type of partner domain for CUG ... DNIC Data network, PRIVATE Private network,
TCC
Public network
DOMAIN=NO: Partner network identity number (CUG)
TDCSU Digital trunks:
TPROF=NO: CUG profile number of trunk
Device types:
Digital CO trunk circuits, interface circuits and tie trunk circuits
For example, SOCOD, S2COD, SOCONN, S2CONN, etc.
Protocol variants:
ECMAV2 - CorNet-NQ Issue 2.1 Dec. 96 96 Basic ETSI
PSS1V2 - CorNet-NQ Issue 2.1 Dec. 96 96 Basic ISO/IEC
EDSGER - EDSS1 protocol for Germany
ETSI - Standard EURO-ISDN
EDSR8 - EDSS1 Reserve 8 protocol