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CGNPISCR – This field indicates if calling party delivery should be
subjected to Presentation Indicator (PI) screening. ETSI PRI trunks
support possible values {Yes, No}. ANSI PRI trunks support possible
values of {Y, N, Cond}. The Cond value indicates that PI screening will
be performed, but presentation restriction will be overridden for VNET
and 800 calls.
CHGPISCR – This field indicates if charge number is to be delivered
and subject to calling party PI screening. ETSI PRI only supports a
value of {No}. ANSI PRI supports values of {Yes, No}.
The process to determine the CGN delivery to an ETSI PRI terminator is
discussed below. The ANI field in table RTGATTR must be datafilled as
"Y" for the following functionality to take effect.
Delivery of the CGN Information Element (IE) for ETSI PRI terminations is
based on CGNDELV, CHGDELV, NOATONSC and CGNPISCR. The
functionality is described below:
CGNDELV = Always
NOATONSC = No
If CGN is available, the CGN is delivered.
CGNDELV = Primary
NOATONSC = No
If CGN is available, the CGN is delivered. Otherwise if CHG is
available, CHG is delivered as CGN with PI of "Allowed" and SI of
"Network Provided".
CGNDELV = Secondary
NOATONSC = No
If CHG is available, CHG is delivered as CGN with PI of "Allowed" and
SI of "Network Provided". If CHG is not available and CGN is
available, CGN is delivered.
CGNDELV = Always
NOATONSC = No
If CGN is available, PI of the CGN parameter is screened. If PI is
"Restricted", the CGN is not delivered. For any other value of PI, CGN
is delivered.
CGNDELV = Primary
NOATONSC = No
If CGN is available, PI of the CGN parameter is screened. If PI is
"Restricted", the CGN is not delivered. For any other value of PI, CGN
is delivered. If CGN is not available and CHG is available, CHG is
delivered as CGN with PI of "Allowed" and SI of "Network Provided".
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
CHGDELV = Never
CGNPISCR = No
CHGDELV = Secondary
CGNPISCR = No
CHGDELV = Primary
CGNPISCR = No
CHGDELV = Never
CGNPISCR = Yes
CHGDELV = Secondary
CGNPISCR = Yes
ETSI PRI 13-9
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