Avaya Integral 3 / 5 FC1 - Manual (Page 33)

The functions Integral 5
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Second call during a conversation
If an external second caller attempts to contact you when you are using
the telephone, you will hear a signal. You can end the first conversation and
take the second call. You can ignore the second call.
This function must be enabled in your telephone system.
Taking the second call
You are speaking on the telephone. You hear a call tone and an info
message appears on the display with the subscriber’s name or call number,
e. g. “Bach”.
Replace the handset. The second call is still in effect.
Lift the handset You are connected to the second caller.
The second caller hears a free-line signal.
If the second call comes from a digital connection and you do not take
the call, the call goes to the call list.