Co Line Calling & I-Use Indication; Co Line Group - Comdial DX-80 Installation & Maintenance Manual

CO Line Calling & I-Use Indication
CO Line calling is the placement of a telephone call on the Public Switched Telephone Network. CO Line calling
includes: dialing local telephone numbers, dialing national long distance telephone numbers and dialing international
long distance telephone numbers.
Placing a CO Line call can be done in several ways:
•
CO Line Button
•
CO Line Group Access Code
•
CO Line Group Button
•
Speed Dial
When you are using an intercom or CO line the associated lamp will light green and flash at a double wink rate at
your telephone. This lamping condition is referred to as I-Use Indication (the indication that you are using this CO
Line.) Lamps for the same CO Line that you are using will light steady red at all other DX-80 digital telephones.
Calls placed on CO Lines are checked against the extension COS (Class of Service). The conditions that can be
applied to the associated COS govern the call connection. If the dialed number is denied in the COS check, the call is
disconnected. If the Call passes the COS check, the call connection is allowed.
Related Features
CO Line Day/Eve Class of Service
Extension Day/Eve Class of Service
Operation
1. Access a CO Line.
2. Press an idle CO Line button.
3. Dial a CO Line Group Access Code (9, 800-806).
4. Press a CO Line Group Button
5. Dial a Speed Dial location that has a stored telephone number.
Conditions
a) If a CO Line is busy when the access attempt is made, busy tone is heard and momentarily the telephone
returns to an idle status.
b) Busy CO Lines may be queued for use. (Reference CO Line Queuing.)
Default Setting
All extensions are programmed with CO Line buttons for CO Lines 1~6.
All extensions are allowed to dial all telephone numbers.

CO Line Group

The system provides eight (8) CO Line Groups for assignment of specific CO lines. The CO Line Group assignment
is used for CO Line Pool access.
The CO Line Groups are (default) designated by three-digit notation when programmed on Digital extension
programmable feature buttons, with the exception of CO Line Group 1, which is default designated a one-digit "9." CO
Line Groups 2 through 8 are programmed by dialing 800 through 806.
Related Features
CO Line Alternate Route
P7290 IMM
DX-80 I M
NSTALLATION AND AINTENANCE
3-67
M
ANUAL
CO Line Assignment
Private Line