Grandstream GRP26XX Series for 3CX

Supported Models: Grandstream GRP26XX series #

• GRP2612
• GRP2613
• GRP2614
• GRP2615 
• GRP2616 

Step 1: Upgrade to the Required Firmware #

Ensure that the phone is running on the required firmware by 3CX.

Step 2: Factory Reset the IP Phone #

Before provisioning the IP phone, the phone must be brought back to its factory default settings to eliminate residual device settings from a previous configuration.

Step 3: Provisioning the Phone #

There are two ways to provision a phone:

• Plug & Play –  For phones on the local LAN or behind the 3CX SBC.
• RPS – For phones on remote networks that will connect directly to 3CX and use STUN

Local LAN or SBC: Provision via Plug’n’Play #

1. Connect the phone to the network. A PnP request will be sent automatically to 3CX.
2. Go to “Phones” in 3CX Management Console. The new phone will be marked in Bold.

3. Click on the BOLD entry and choose between “Assign Ext” or “Add Ext”, depending on whether you want to assign the phone to an existing extension or create a new one.

4. All major provisioning settings are pre-populated. If your PBX has multiple network cards, select on which network interface this IP phone is connected.
5. Click “OK”. The phone will be configured automatically and will reboot to finalize the setup.

Remote phones: Provision via RPS server #

1. Take note of the phone’s MAC address, usually written at the back of the phone.
2. Go to “Phones” in the 3CX Management Console and press “+ Add Phone”.
3. From the dropdown list select the extension to which this phone must be assigned.

4. In the next dialog select the Vendor/Model of the phone and enter the device’s MAC address.

5. Set the “Provisioning Method” to “Direct SIP (Stun – Remote)” and click “OK”.

6. Ensure that the extension is ready to be configured via RPS by checking the “Event Log” from the “Dashboard”. If the message appears as a “Warning” follow the instructions outlined in the message and use the Manual Link Provisioning method.
7. The phone is now ready to be provisioned – you can boot up the phone from anywhere.

8. The phone will reboot twice and prompt for a username and password: Enter the extension number as the username, press the downward arrow and the voicemail PIN as the password. Press OK.