
Feature Renumbering
While the dialing codes for personal and group intercoms and for feature access are set by system default, they
are flexible, and the installer can renumber them when necessary. Feature renumbering may be necessary if
personal or group intercom numbers must be in a certain block or sequence to match some site requirement (for
example, numbering all telephones located on the third floor with 3nnn numbers). If a new number assignment
conflicts with a defaulted dialing code, the defaulted code can be reassigned into a block of unassigned numbers
set aside for that purpose.
At default, the blocks of numbers are as follows:
1001–1096 personal intercom for stations
2001–2096 personal intercom for IST pedestal
3001–3096 group intercom for IST ped
4001–4096
group intercom for stations
5000–5079
6000–8999 feature codes
5080–5999 unassigned codes
9 line group 1
The installer can reassign any number between 1 and 9999 to any intercom or feature code in any combination
of three- or four-digits; however, the assigned numbers must not conflict with one another. For instance, if 2111
is assigned as an intercom number, there cannot be any intercom or feature code numbered 21, 21n, or 21nn.
Similarly, since 9 is defaulted as the code for line group one, there cannot be any intercom or feature code
numbered 9n, 9nn, or 9nnn.
Flexible Ringing Assignments
The installer can arrange ringing assignments for every station. He or she can arrange for this ringing to sound
immediately as soon as the call appears on specified lines at a telephone (direct ringing) or after a system
imposed delay (delayed ringing). Further, he or she can arrange for a telephone to ring when calls appear on
specified lines during certain periods of the day or night. To program for flexible ringing, the installer assigns
lines to the direct and delayed ringing modes. He or she also divides a 24-hour period into three time blocks
designated as day 1, day 2, and night mode and assigns lines to each of these categories. The installer then
assigns the direct, delayed, day 1, day 2, and night mode ringing designations to the various stations.
During the day 1 time period, calls on lines assigned to direct, delayed and day 1 categories all ring. During the
day 2 time period, calls on lines assigned to direct, delayed and day 2 categories all ring. During the night time
period, calls on lines assigned to delayed and night both ring.
The system also provides a manual night transfer (of ringing) feature that the attendant activates by dialing a
code or pressing a preprogrammed button. While this feature is active, calls on lines assigned to delayed and
night ringing both ring at the various stations; however, no other ringing occurs.
Also refer to the discussions titled Auxiliary Ringer Interface, Common Audible Ringer Interface, External
Paging Interface, Line Answer From Any Station, and Night Transfer (Of Ringing).
6 – 48 General Description
GCA40–215 General Description
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