Avaya PARTNER Advanced Communications System Installation And Use Manual page 209

Using the Telephones
Joining a Call on a Single-Line Telephone
6
A steady red light next to a line button indicates a call is in progress at another extension. To join a
call by using a single-line telephone:
1. Lift the handset.
You hear intercom dial tone.
68
2. Dial and the number of the line on which the call is being conducted.
Handling Calls
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