Administrator's Guide

Feature-Related System Parameters
Issue 5 October 2002 831555-233-506
Feature Plus Ext
International CPN Prefix
Allows you to apply prefixes to international calling numbers for display at
receiving phones. This is useful for those phones that use or implement call back
features based on incoming call numbers. When an ISDN-PRI call arrives, the
incoming call setup is analyzed for: (1) whether the Type of Address (TOA) is
national or international, and (2) whether the Numbering Plan Identifier (NPI) is
Unknown or ISDN/Telephony. This administered prefix is applied to international
calls. Prefixing applies to any subsequent display on the same switch when the
call is transferred, covered, or forwarded. The same prefixing applies to outgoing
ISDN-PRI calls when the connected number information is returned and meets the
same TOA and NPI criteria. The prefix plus the calling/connected number digit
string is limited to 15 digits, with truncation occurring at the least significant
digits.
Maximum Length
Appears only if the Unknown Numbers Considered Internal for AUDIX field is y.
Indicates the maximum length of an unknown private number. Any unknown
number longer than the administered value is considered external. This field
cannot be blank when it appears.
Valid entries Usage
A valid extension Administration of this field is required for proper
termination of some Feature Plus signaling. For
example, Message Waiting Indication (MWI)
requires this extension in order to send the indication
to the appropriate switch. Appears only if the ISDN
Feature Plus field is
y on the System Parameters
Customer Options screen.
Valid entries Usage
1 to 5 digits,
0 through 9, *
and
# or
blank
Enter a number that allows you to apply prefixes to
international calling numbers for display.
Valid
entries Usage
1
through 20 Enter a number for the maximum length of an unknown
private number.