Section 700 - Operation
You can press the ON/OFF key to get intercom dial tone.
MCO Trunk Access
The System supports up to 5 MCO groups for each MCO tenant group. You can seize an idle trunk
from the MCO trunk group by entering the MCO access code.
To seize an idle trunk:
1. Lift the handset or press the ON/OFF key.
2. Enter the trunk access number (9 or 81-84). (See Table 20.)
3. Dial the phone number.
FF1-3: MCO Access
FF1-2: Dial Plan
FF5-2: MCO Trunk Group (Outbound)
The System supports up to 576 outside lines in a six-cabinet configuration. These lines can be
divided into 99 different trunk groups.
Each trunk group can support up to 50 outside lines.
Each MCO Tenant Group can have up to 5 MCO trunk access codes. System defaults for MCO
trunk access codes are displayed in the following table.
MCO1 can have up to 5 trunk groups assigned by the Advanced Trunk Group feature.
MCO1 access code is used for Automatic Route Selection (ARS) access code.
Table 20. MCO Trunk Access Codes
Trunk Access Code
DBS 576 (USA), issued January 1999
Chapter 5. Key Telephone Features
Intercom dial tone
• Outside dial tone
• CO XXX displays (where XXX = trunk
Dialed phone number displays