R0106-HP MSR Router Series Voice Configuration Guide(V7)

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3. Presses hookflash and presses 2. Each party restores its state before entering the three-party
conference. The call between Telephone B and Telephone A (the other party in the original active
call) is held, and the call between Telephone B and Telephone C can continue.
4. Presses hookflash again and presses 3. The three parties re-enter the three-party conference.
A participant of the three-party conference can invite another party to join the conference to implement
conference chaining. For example:
5. Telephone C presses hookflash and dials Telephone D.
6. Telephone D goes off-hook.
7. Telephone C presses hookflash again and presses 3.
Telephone A, Telephone B, Telephone C, and Telephone D can speak to each other. Telephone A,
Telephone B, and Telephone C can be considered to be in a three-party conference, with
Telephone B as the conference initiator. Telephone B, Telephone C, and Telephone D can be
considered to be in a three-party conference, with Telephone C as the conference initiator.
When you implement conference chaining, follow these restrictions and guidelines:
• Make sure VPM resources are installed on the devices of the conference initiators. You can use the
display version command to view the installed VPM resources.
• Only a conference participant that establishes a call with the initiator over IP can implement
conference chaining.
Figure 46 Network diagram
Call services configuration task list
Call waiting, call hold, call transfer, call backup, and three-party conference are enabled on the device
by default. No configurations are required for them.
To configure call services, perform the following tasks:
Tasks at a
g
lance
(Optional.) Configuring the call hold mode
(Optional.) Configuring call forwarding
(Optional.) Configuring MWI