Vodavi Starplus DHS, Technical Manual

Page: 159 / 338

4-38 CO Line Signaling
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Pressing an idle CO line group button to originate/answer a CO line call will affect the
LED indication of an individual CO line button (i.e., CO line status will be indicated on
both CO line group button and an individual CO line button). The LED indication on a
CO line group button and an individual CO line button will be treated in the same
way.
†
Certain states and telephone companies prohibit PBX-type equipment operation
behind Centrex lines.
CO Line Signaling
Description
Incoming CO line calls are indicated by a flashing red LED and distinctive tone from the
key telephone speaker. Depending on the programmed database, a station may see
incoming call flash indication without an audible indication, and still answer the call. If
the station is not assigned CO Line Receive in the database for a specific CO line,
incoming calls on that CO line will not flash at the station but instead will display a CO
line busy indication.
Operation
1. incoming calls signaling on CO line 1 and CO Line 2 display as follows:
Conditions
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Only those stations with corresponding CO line ring and receive assignments will
display the current incoming CO line call status. CO line receive must be enabled for
the station.
†
When the remote party abandons the incoming call before it is answered, the
incoming call signaling of the affected CO line will be removed after (1.6 to 6.4 sec.),
depending on the connected CO.
At default, only the attendant is allowed to receive external CO line ring and can answer
all incoming CO line calls.
CO Line Type Assignment
Description
Each CO line can be assigned as PBX, CO or OPEN. The Open assignment is reserved for
CO lines equipped on the system, but not connected to telephone company network
facilities. The Open type indication alerts the system that this CO line should not be used
to place outgoing calls when system features are invoked which initiate automatic CO
line selection. The PBX CO line type indication invokes other system automatic
L N1 L N 2.