Grandstream GCC6020 Built-in IPPBX (12 Users, 4 Concurrent Calls) + enterprise-grade firewall + VPN Router + 1 x 2.5 Gb, 1 x 10 Gig SFP+, 4 x GigE Network Switch
Frequently Asked Questions
First, check that the phones are on the same subnet as the GCC6020 or that VLAN routing is correctly configured. Then verify that the extension numbers and passwords you entered in the phone match the user settings in the GCC6020's web interface. If the issue persists, a Toronto-based VoIP support provider can usually resolve this remotely.
Log into the GCC6020's web UI, go to the VPN section under Network, and choose your preferred protocol (e.g., OpenVPN or IPsec). Configure the server settings, then install the corresponding client on your remote device using the exported configuration file. Ensure that the firewall rules allow the VPN traffic.
Start by verifying that the GCC6020 has a stable internet connection—run a speed test from its LAN side and check for packet loss. Also, confirm that QoS settings are enabled on the WAN interface to prioritize SIP and RTP traffic. If the problem continues, test with a wired connection instead of Wi-Fi.
Yes, the GCC6020 supports standard SIP trunks. In the PBX settings, add a SIP trunk with the provider's server address, port, and your account credentials. Make sure your firewall rules allow outbound SIP and RTP traffic on the required ports (typically 5060 UDP and the RTP range).
The GCC6020 includes a DHCP server that is enabled by default. Check that the DHCP server is turned on in the Network > LAN settings. Also, verify that no other DHCP server (e.g., from an upstream router) is conflicting on the same subnet.
Log into the web UI, go to Security > Firewall > Port Forwarding, and create a new rule. Enter the external port, internal IP address, and internal port for the service you want to expose. Be sure to restrict the source IP if possible to reduce security risk.
Ensure that the Wi-Fi APs and the GCC6020 are on the same Layer 2 network or that the APs can reach the GCC6020's management IP. The GCC6020 uses the Device Management System protocol; verify that the APs are in the same VLAN or that multicast is not blocked between them.
Yes, the built-in PBX supports standard SIP endpoints. You will need to manually configure the phone's SIP account using the extension number, server address (the GCC6020's LAN IP), and credentials from the PBX user settings. Some advanced features like BLF or provisioning may not work as seamlessly.
This can happen if the device is overloaded or if there is a browser cache issue. Try accessing it from a different browser or clearing your cache. Also, check the system log in the web UI for any error messages. If the device is under high call volume, consider reducing concurrent calls or upgrading the network.
In the web UI, go to Maintenance > Backup/Restore and click 'Backup'. The configuration file will be downloaded to your computer. Store it securely; you can use this file to restore settings after a factory reset or when replacing the unit.
IP PBX
Grandstream GCC6020 Built-in IPPBX (12 Users, 4 Concurrent Calls) + enterprise-grade firewall + VPN Router + 1 x 2.5 Gb, 1 x 10 Gig SFP+, 4 x GigE Network Switch
The GCC6020 provides an all-in-one solution that redefines the communications experience by merging unified communications and networking solutions into one platform. This state-of-the-art device combines the functionality of 4 products to provide a single, powerful solution. Key Features: • Integrated VPN router • Enterprise-grade firewall • Built-in IPPBX for up to 12 users with 4 concurrent calls • 1 x 2.5 Gb and 1 x 10 Gig SFP+ ports • 4 x GigE network switches This device provides unified management and centralized control of all Grandstream endpoint solutions, including Wi-Fi APs, network switches, IP Phones, and more. It allows for full UC, networking, and security solutions to be configured in minutes and managed through the cloud with our Device Management System or via a mobile app, local Web UI, CLI, and SSH console management. Ideal for small-to-medium sized businesses, the GCC6020 provides an all-in-one platform that combines business data, security, communication, and collaboration needs into one device.
About This Product
The Grandstream GCC6020 is a compact all-in-one appliance designed for small businesses that want to consolidate their voice, data, and security infrastructure into a single manageable device. It is ideal for a small office of up to 12 users, such as a professional services firm, retail location, or branch office of a larger organization, where a full-sized PBX and separate networking gear would be overkill. By combining a built-in IP PBX, enterprise-grade firewall, VPN router, and a multi-gigabit network switch, the GCC6020 replaces the need for four separate pieces of equipment, simplifying procurement, cabling, and ongoing maintenance.
For a Canadian small business in the GTA, the GCC6020 offers straightforward compatibility with major SIP trunk providers and can be managed locally or through Grandstream's cloud-based Device Management System. The 12-user, 4-concurrent-call limit means it is well-suited for teams that do not require heavy call volume, but it may feel constrained in a fast-paced sales or customer service environment where many calls happen simultaneously. The integrated firewall and VPN router provide basic network security and remote access, though organizations with advanced security needs (e.g., PCI compliance) may still require a dedicated next-generation firewall upstream.
The device’s switch ports include one 2.5Gb port and one 10 Gig SFP+ port, which allow for high-speed uplinks to a server or a faster LAN backbone, while the four Gigabit ports handle typical office devices like PCs and IP phones. This makes the GCC6020 a practical choice for a small office that already uses Grandstream endpoints (phones, Wi-Fi access points, switches) and wants unified management. However, if your team grows beyond 12 users or requires more than four concurrent calls, this device will quickly become underpowered, and you would need to look at a larger PBX or a separate voice platform.
For a Canadian small business in the GTA, the GCC6020 offers straightforward compatibility with major SIP trunk providers and can be managed locally or through Grandstream's cloud-based Device Management System. The 12-user, 4-concurrent-call limit means it is well-suited for teams that do not require heavy call volume, but it may feel constrained in a fast-paced sales or customer service environment where many calls happen simultaneously. The integrated firewall and VPN router provide basic network security and remote access, though organizations with advanced security needs (e.g., PCI compliance) may still require a dedicated next-generation firewall upstream.
The device’s switch ports include one 2.5Gb port and one 10 Gig SFP+ port, which allow for high-speed uplinks to a server or a faster LAN backbone, while the four Gigabit ports handle typical office devices like PCs and IP phones. This makes the GCC6020 a practical choice for a small office that already uses Grandstream endpoints (phones, Wi-Fi access points, switches) and wants unified management. However, if your team grows beyond 12 users or requires more than four concurrent calls, this device will quickly become underpowered, and you would need to look at a larger PBX or a separate voice platform.
Services We Provide
- Professional Installation & Configuration
- Ongoing Maintenance & Support
- Troubleshooting & Repairs
- System Upgrades & Updates
