ATCOM A21 User Manual page 40

A2X(W)/A20LTE IP Phone User Manual
2. Call Waiting
The feature of "Call Waiting" is available by default. If switch off this feature, whatever
multiple SIP accounts had been registered successfully, only one single active calling is
permitted (for example Dialing, Ringing, Calling, Holding).
Item
Call Waiting
ATCOM TECHNOLOGY CO., LIMITE
Operation
Press the key .
40
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Description
Switch on or Switch off the feature.
or