Table of Contents
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1.16 Button Features
Conditions
• LED Indication
Certain buttons are equipped with LED (light-emitting diode) indicators to show line or
feature status.
• CO Button Type
CO buttons can be classified as the following three types:
Single-CO (S-CO) button / Group-CO (G-CO) button / Loop-CO (L-CO) button
• For the operation of each button, please refer to the User Manual.
Programming Guide References
• 4.3 Extension Line
– CO Key
Features Guide References
1.16 Button Features
• Button, Flexible
User Manual References
• 4.1.2 Customising the Buttons
• 4.3.5 Flexible CO Button Assignment (005)
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Features Guide
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