Grandstream Networks GXP21 Series User Manual page 19

5-Way Conferencing
GXP can host conference calls and supports up to 5-way conference calling (Excludes GXP2100 which
supports up to 4-way).
1. Initiate a Conference Call

Establish a connection with two or more parties

Press CONF button

Choose the desired line to join the conference by pressing the corresponding LINE button.

Repeat previous two steps for all other parties that would like to join the conference. This
can be done at any time. However, if a new call comes in, the other calls will be placed on
hold and the host will have to individually re-join the held lines back into the conference by
repeating the previous two steps again.
2. Cancel Conference: Canceling establishing conference call.
If after pressing the "CONF" button, a user decides not to conference anyone, press CONF

again or the original LINE button.

This will resume two-way conversation.
3. End Conference:

Press HOLD to end the conference call and put all parties on hold;

To speak with an individual party, select the corresponding blinking LINE.
NOTE: The party that starts the conference call has to remain in the conference for its entire duration, you
can put the party on mute but it must remain in the conversation. Also, this is not applicable when the feature
"Transfer on call hangup" is turned on.
Voice Messages (Message Waiting Indicator)
A blinking red MWI (Message Waiting Indicator) indicates a message is waiting. Press the MSG button to
retrieve the message. An IVR will prompt the user through the process of message retrieval. Press a
specific LINE to retrieve messages for a specific line account.
NOTE:

Each line has a separate voicemail account. Each account requires a voicemail portal number to be
configured in the "voicemail user id" field.

To check which line account has a message 1) press the message button (this always checks the
primary account), 2) check each line for stutter tone or 3) check missed calls using the menu.
Busy Lamp Field
The Multi Purpose Key buttons can be configured for Busy Lamp Field function with a specified account.
When BLF is configured on one of the multi-functional buttons, the Speed Dial function will work when that
line is not in use. Call Pick Up is supported when user presses a flashing BLF key.
Shared Call Appearance (SCA)
The GXP21xx phone supports shared call appearance by Broadsoft standard. This feature allows members
of the SCA group to shared SIP lines and provides status monitoring (idle, active, progressing, hold) of the
shared line. When there is an incoming call designated for the SCA group, all of the members of the group
will be notified of an incoming call and will be able to answer the call from the phone with the SCA extension
registered.
All the users that belong to the same SCA group will be notified by visual indicator when a user seizes the
line and places an outgoing call, and all the users of this group will not be able to seize the line until the line
Grandstream Networks, Inc.
:
GXP21xx User Manual
Firmware 1.0.1.26
Page 19 of 42
Last Updated: 11/2010