Avaya Communication Manager Administrator's Manual page 1353

CPN Prefix
Use this field to specify the number that is added to the beginning of the extension to form a
Calling or Connected Number.
Valid entries
1 to 15 digits
blank
Ext Code
Allows for groups of extensions to be administered.
Note:
When 0 alone is entered, the Ext Len field must be 1 and the DDD number must
Note:
be 10-digits.
Valid entries
0 to 9 or blank
attd
Usage
Only digits are allowed in the CPN Prefix column. Leading spaces, or
spaces in between the digits, are not allowed.
If the length of the CPN Prefix matches the Total CPN Length, the
●
extension number is not used to formulate the CPN number.
If the number of digits in the CPN Prefix plus the extension length
●
exceeds the administered Total CPN Length, excess leading digits
of the extension are deleted when formulating the CPN number.
If the number of CPN Prefix digits plus the extension length is less
●
than the Total CPN Length, the entry is not allowed.
If the Total CPN Length is 0, no calling party number information is
●
provided to the called party and no connected party number
information is provided to the calling party.
If this field is blank, the extension is sent unchanged. This is useful in
countries where the public network is able to insert the appropriate CPN
Prefix to form an external DID number.
Usage
The Ext Code can be up to 7-digits long depending on the Ext Len field
entry. The entry cannot be greater than the Ext Len field entry. For
example, in the case of a 4-digit Ext Len field entry, an Ext Code of 12 is
the equivalent of all extensions of the screen 12xx, excluding any
explicitly listed longer codes. If a code of 123 is also listed, the 12 code is
equivalent of all extensions of the screen 12xx except extensions of the
screen 123x. The coding precludes having to list all the applicable 12xx
extensions.
For attendant
Numbering — Public/Unknown Format
Issue 2.1 May 2006 1353