1. Introduction
1.1 Product Overview
The Grandstream GRP2602G is a carrier-grade IP phone designed for mass deployment. It features 2 lines, 4 SIP accounts, a 2.4-inch LCD display, and dual-port Gigabit Ethernet with integrated Power over Ethernet (PoE). This manual provides comprehensive instructions for setting up, operating, and maintaining your GRP2602G IP phone, ensuring optimal performance and security.
1.2 Key Features
- Supports 2 lines and 4 SIP accounts for flexible communication.
- Swappable faceplate for easy logo customization, ideal for service providers.
- Enterprise-level protection including secure boot, dual firmware images, and encrypted data storage for enhanced security.
- Supports 5-way audio conferencing for efficient group communication.
- Equipped with noise shield technology to minimize background noise, ensuring clear audio.
2. Package Contents
Please check the package carefully for the following items. If any item is missing or damaged, please contact your vendor.
- GRP2602G IP Phone Unit
- Handset with Cord
- Ethernet Cable
- Phone Stand
- Quick Installation Guide (QIG)
3. Physical Description
3.1 Front View

The front of the GRP2602G features a 2.4-inch LCD display, a full numeric keypad, and dedicated function keys for common operations such as message, headset, mute, hold, transfer, and conference. The navigation cluster allows for easy menu navigation and selection.
3.2 Side View

This view shows the ergonomic design of the handset and the phone's main body, along with the attached stand that allows for optimal viewing angles on a desk.
3.3 Rear View and Ports

The rear of the phone houses all necessary connection ports:
- PC Port: Connects to a computer or other network device.
- LAN Port: Connects to your network switch or router (supports PoE).
- Handset Port: Connects the coiled handset cord.
- Headset Port: Connects a compatible RJ9 headset.
- DC5V Power Port: For connecting an optional 5V DC power adapter (if PoE is not used).
4. Setup
4.1 Assembling the Phone
- Attach the phone stand to the back of the phone unit by aligning the tabs and sliding it into place until it clicks securely.
- Connect the coiled handset cord to the handset port on the phone and the corresponding port on the handset.
4.2 Connecting to the Network
The GRP2602G supports Power over Ethernet (PoE), simplifying installation.
- Using PoE: Connect one end of the Ethernet cable to the LAN port on the phone and the other end to a PoE-enabled switch or router. The phone will power on automatically.
- Without PoE (Optional): If PoE is not available, connect one end of the Ethernet cable to the LAN port on the phone and the other end to your network switch/router. Then, connect a Grandstream certified 5V DC power adapter (not included) to the DC5V power port on the phone and plug it into a power outlet.
- Optionally, connect a computer to the PC port on the phone using another Ethernet cable to share the network connection.
5. Operating Instructions
5.1 Making a Call
- Lift the Handset or press the Speakerphone button.
- Dial the desired number.
- Press the Dial soft key or wait a few seconds for automatic dialing.
5.2 Answering a Call
- When the phone rings, lift the Handset, or press the Speakerphone button, or press the Answer soft key.
5.3 Using the Speakerphone
- To activate speakerphone during a call, press the Speakerphone button.
- To switch back to the handset, simply lift the handset.
5.4 Using a Headset
- Connect your RJ9 headset to the headset port on the back of the phone.
- Press the Headset button to toggle between headset mode and speakerphone/handset mode.
5.5 5-Way Audio Conferencing
- While on an active call, press the Conference button.
- Dial the number of the next participant and press Dial.
- Once the second participant answers, press the Conference button again to join all parties.
- Repeat for up to 5 participants.
5.6 Noise Shield Technology
The GRP2602G is equipped with noise shield technology to reduce background noise during calls. This feature is active by default and helps ensure clearer conversations, especially in noisy environments.
6. Maintenance
6.1 Cleaning the Phone
- Always disconnect the phone from power before cleaning.
- Use a soft, dry, lint-free cloth to wipe the phone's surface.
- For stubborn marks, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Do not spray liquids directly onto the phone.
- Avoid using harsh chemicals, abrasive cleaners, or solvents as they may damage the phone's finish.
6.2 Storage
If storing the phone for an extended period, ensure it is clean, dry, and stored in a cool, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
This section addresses common issues you might encounter with your GRP2602G IP Phone.
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone does not power on. | No power from PoE switch or power adapter. | Ensure Ethernet cable is securely connected to a PoE-enabled port, or verify power adapter is correctly plugged in and functional. |
| No dial tone. | Network connectivity issue or SIP registration failure. | Check Ethernet cable connection. Verify network status. Contact your VoIP service provider or IT administrator to confirm SIP account registration. |
| Poor call quality (echo, static). | Network congestion, faulty cable, or environmental noise. | Ensure stable network connection. Replace Ethernet cable if damaged. Utilize the phone's noise shield technology. Adjust volume levels. |
| Cannot make or receive calls. | SIP account not configured or registered. | Confirm SIP account details are correctly entered in the phone's web interface. Ensure the account shows as 'Registered' on the phone's display. |
8. Specifications
Below are the technical specifications for the Grandstream GRP2602G IP Phone:
| Feature | Detail |
|---|---|
| Product Dimensions | 1 x 1 x 1 inches |
| Item Weight | 1.98 pounds (0.9 Kilograms) |
| Model Number | IPG-GRP2602G |
| Brand | Grandstream |
| Color | Black |
| Telephone Type | Corded |
| Power Source | Power over Ethernet (PoE) |
| Dialer Type | Single Keypad |
| Answering System Type | Digital |
| Compatible Devices | Headset, Desktop, Laptop |
| Conference Call Capability | 5-way |
| Display | 2.4-inch LCD |
| SIP Accounts | 4 |
| Lines Supported | 2 |
| Ethernet Ports | Dual-Port Gigabit Ethernet |
9. Warranty and Support
The Grandstream GRP2602G IP Phone comes with a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Grandstream website.
For technical support, troubleshooting assistance, or to access additional resources such as firmware updates and FAQs, please visit the Grandstream support portal or contact your authorized Grandstream reseller.







