Grandstream GXP1100 User Manual - Manual (Page 22)

FIRMWARE VERSION 1.0.8.4 GXP1100/GXP1105 USER MANUAL Page 20 of 53
 Enter the number and press SEND key or # to make a second call;
 Press TRAN key again. The call will be transferred.
Note:

To transfer calls across SIP domains, SIP service providers must support transfer across SIP domains.

When two lines are active, GXP110x can only do attended transfer because the phone supports at
most two lines simultaneously.
3-WAY CONFERENCING
GXP1100/GXP1105 can host 3-way conference call (PCMU/PCMA) by using Multi Purpose Key or FLASH
key.

To use Multi-Purpose Key to establish 3-way conference call, go to GXP1100/GXP1105 Web
GUI->Settings->Programmable Keys, configure the 3-way conference as the Multi Purpose Key mode.
Click "Save and Apply" on the bottom of the page. Then follow the steps below for 3-way conferencing.
Figure 3: GXP1100/GXP1105 Multi Purpose Key - 3 way Conference
1. Initiate a conference call.
 Establish two active calls with two parties respectively;
 Press the Multi Purpose Key previously configured as "3-way Conference" in Web GUI;
 3-way conference will be established.