Comparing the latest Grandstream phones: A comprehensive guide to choosing the right VoIP phone for your business

Grandstream IP phones offer several advantages over traditional landlines, making them ideal for businesses and organizations looking to improve communication efficiency.

Cost Savings – IP phones use VoIP (Voice over Internet Protocol), which significantly reduces call costs, especially for long-distance and international communication.

Scalability – Businesses can easily add or remove lines without extensive infrastructure changes, making Grandstream phones ideal for growing companies.

Advanced Features – Unlike traditional landlines, Grandstream IP phones offer features like call forwarding, IVR, HD voice, call recording, multi-line support, Wi-Fi connectivity, and video calling.

Flexibility & Mobility – With Wi-Fi and Bluetooth-enabled models, employees can stay connected from different locations without being tied to a desk.

Integration with Business Tools – Many Grandstream phones integrate with CRM systems, call center software, and collaboration tools for a streamlined workflow.

Grandstream offers multiple phone series tailored for different business sizes and needs. Here’s a quick breakdown:

• GRP Series (Carrier-Grade & Business IP Phones) – Ideal for enterprises, call centers, and offices needing high performance, security, and cloud provisioning.

• GXP Series (Professional & Executive IP Phones) – Designed for small to medium businesses with essential VoIP features, HD voice, and affordability.

• GXV Series (Video Phones & Collaboration Devices) – Perfect for businesses needing video conferencing, touchscreens, and multimedia integration.

• GHP Series (Hospitality & Conference Phones) – Tailored for hotels, hospitals, and guest service industries with easy deployment and customization.

• DP Series (Cordless DECT Phones) – Best for warehouse staff, retail employees, or businesses needing mobile VoIP solutions.

If you’re running a large business with complex call routing needs, the GRP Series is ideal. For small offices, the GXP Series provides reliable communication at a lower cost.

Yes, Grandstream IP phones are SIP-compatible, meaning they can work with most VoIP service providers, including NUACOM. However, it’s important to check a few key things before choosing a provider:

Provisioning & Configuration – Some VoIP providers offer pre-configured Grandstream phones, making setup seamless. Otherwise, manual configuration is required.

Feature Support – Not all VoIP providers support advanced features like call recording, call queues, or HD voice. Check if your provider offers full feature compatibility.

Network & Bandwidth Requirements – VoIP performance depends on a stable internet connection. Ensure your network can support high-quality voice traffic.

Setting up a Grandstream IP phone is simple, and most models support auto-provisioning for quick deployment. Here’s a general step-by-step guide:

Step 1: Connect the Hardware

• Plug the Ethernet cable from your network switch or router into the LAN port of the Grandstream phone.

• If using a PoE (Power over Ethernet) model, the phone will receive power through the Ethernet cable. Otherwise, plug in the AC power adapter.

• For Wi-Fi-enabled models, go to the phone’s settings and connect to your Wi-Fi network.

Step 2: Find the Phone’s IP Address

• Press the Menu button on the phone, navigate to Status → Network to find the phone’s IP address.

• Enter this IP address into a web browser on your computer to access the Grandstream Web GUI.

Step 3: Log into the Web Interface

• Default credentials are:

  • Username: admin

  • Password: admin (or check the device label)

• Once logged in, navigate to Accounts → SIP Settings and enter your VoIP provider’s details (SIP server, username, and password).

Step 4: Save and Restart

• Click Save & Apply and restart the phone.

• Once restarted, your phone should be registered and ready to make calls.

For bulk setups in enterprise environments, Grandstream provides Zero-Config provisioning, allowing administrators to configure multiple devices remotely.

If your Grandstream phone isn’t working properly, follow these troubleshooting steps:

1. Check Physical Connections

🔹 Make sure the phone is properly connected to power and the network.
🔹 If using PoE, confirm that the Ethernet cable is plugged into the correct PoE switch port.

2. Verify Internet & SIP Server Settings

🔹 Check if other network devices (computers, other IP phones) are working. If not, restart your router/modem.
🔹 Log into the Grandstream Web GUI (phone’s IP address → browser login) and confirm the SIP server address, username, and password are correctly configured.

3. Restart the Phone

🔹 Reboot the phone by unplugging it for 30 seconds and then reconnecting it.

4. Check Firewall & NAT Settings

🔹 If using a business network, check that firewalls aren’t blocking SIP traffic (ports 5060–5061).
🔹 Enable STUN or NAT traversal in SIP settings if needed for remote connections.

5. Factory Reset (as a Last Resort)

🔹 If all else fails, reset the phone:

• Press & hold the “Menu” button → Navigate to Factory Reset → Confirm.

• This will erase all settings and restore factory defaults. You’ll need to reconfigure the phone after resetting.

If the issue persists, contact Grandstream support or your VoIP provider for further assistance.