Installation manual
Function 3: Extension programming  IVX 128 
F.2 
4. CO line group 
Assigns the extension’s ability to access one 
or more
 CO line groups (9, 8, and 71–76). 
Default:
 9. 
5. and 6. Call forward busy/no answer 
The extension can be set to call forward busy/no answer to another extension (or department), a 
mailbox or a branch ID for day mode and differently for night mode. 
Default:
 The extension’s mailbox. 
7. Extension page zone assignment 
List the page zones (1, 2, 3) that are to include this extension. All stations are in All Page and can-
not be edited. 
Default:
 0 (All page).
The overhead paging port (extension 199) can be paged along with other extensions in a zone by 
including the desired page zone(s) for extension 199. 
All
 digital phone extensions are included in (and cannot be removed from) the all-page zone. 
Analog extensions cannot be included in page zones.
8. Operator translation 
Extension 0 (Operator) programming requires: 
•  Programming call forwarding for day and night mode 
•  Entering the extension number to which calls are to be directed when someone dials 
0
. 
Default:
 100. 
Analog ports 
The last four station ports on a 684 port card, and all 12 ports on an A12 port card, are analog 
ports and can be programmed only as follows: 
1.  2.  3.  4.  5.  6. 
Ext. Type Name CO CF day CF night 
0
  Operator    X100  X100 
100
DIGITAL  Jane  9  MB100  X105 
101
DIGITAL  Roger  9  MB101  MB101 
102
DIGITAL  Sally  9,8  MB102  MB102 
109
  EXT  Roger 2  9  MB106  MB106 
110
  FAX/MODEM/ 
RINGER/DOOR 
FAX/MODEM/ 
RINGER/DOOR 
9 ID9999  ID9999 










