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FIRMWARE VERSION 1.0.5.15 GXP2120/GXP2110/GXP2100/GXP14xx USER MANUAL Page 17 of 76
GXP2120 with 2 GXP EXT Boards GXP EXT Board
Reverse side of connection with connection
plate
GXP2120/2110 has a special port on
the back
Figure 2: GXP2120/GXP2110 EXT Board Connection
Connect the first GXP EXT board to the GXP2120/2110 using the connection cable found in the GXP EXT
board package. The first GXP EXT board draws power directly from the phone. Connect the second GXP
EXT board using the connection plate and the connection cable. The GXP2120/2110 will automatically
reboot and power up the GXP EXT boards. Grandstream recommends, though not required, to use a
separate power supply with the second GXP EXT board.
Note:
Should your system lose power, please unplug your devices and power up the GXP2120/2110 first.
EXT board for GXP2120/2110 is the same for GXP2020/2010 models. However, GXP2120/2110 uses
a different-shaped connector for the special port (as shown above). Connection cables will be included
with the EXT board.
EXT board for GXP2120/2110 does not support hot-swap. Once connected, user should reboot the
phone to ensure the setup will work correctly.
GXP2120/2110 can drive 2 EXT boards. Independent power adapters are not needed for the EXT
board.
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