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VoIP subscriber gateways 93
R 1—answer the waiting call.
R 2—switch to a new call.
R—short clearback (flash).
5.3 Three-way conference call
Three-way conference is a service that enables simultaneous phone communication for 3 subscribers. For
detailed three-way conference mode information see Section 5.1 Call transfer.
Subscriber that started the conference is deemed to be it's initiator, two other subscribers are the
participants.
There are two operation modes for a three-way conference: local mode and remote mode. In the first
mode, the conference is assembled locally by the initiating subscriber; in the second mode, the conference is
established remotely by a remote server, also known as the conference server.
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