Fast dispatch and helpful advice before we placed a multi-site order. Pricing was clear and the product arrived ready for install.
Wesley G.
Grandstream GCC6021 Router, PBX, Switch and Firewall
- Integrated VPN router, firewall, IP PBX, and managed switch
- SIP-based voice and video communication support
- Next-generation firewall with traffic inspection and security policies
- VPN support for secure remote access
- Managed switching with VLAN and QoS capabilities
- Centralised cloud management via GDMS
- Support for VoIP endpoints and SIP trunks
- Unified management of network and communications services
- Designed for Grandstream GCC6000 ecosystem integration
- Product Type: Unified communications networking appliance
- Model: Grandstream GCC6021
- Functions: Router, IP PBX, firewall, managed switch
- Network Role: LAN/WAN routing with integrated security
- Voice Support: SIP IP PBX (extensions and trunks supported)
- Security: Next-generation firewall with policy-based filtering and VPN support
- Management: Web UI, CLI (where applicable), and GDMS cloud platform
- Deployment Type: Desktop or rack-mounted (depending on installation kit)
- Use Case: Unified communications and secure networking infrastructure
Trusted by trade buyers
"CLI Secure has been our go-to for Fortinet hardware and renewals. Fast delivery and knowledgeable support every time."

"We ordered Grandstream phones for a full office rollout. The trade pricing and next-day delivery saved us both time and budget."

"Very professional IT networking supplier. Their pre-sales team helped us spec the right firewall for a multi-site deployment."

"Great stock availability on Hikvision cameras. Everything arrived well packaged and on time. Will order again."

Built for B2B buying
From product selection to deployment, this is made for real projects.
Get the hardware, licences and supporting kit you need without chasing multiple suppliers. CLI Secure helps trade buyers confirm fit, stock, delivery and project pricing before checkout.
Better buying value
Why trade buyers choose CLI Secure
- Trade and bulk pricing support
- Compatibility advice before purchase
- UK delivery options and account support
- Hardware, renewals and accessories in one place
- Limited project advice
- Unclear warranty or channel source
- Harder to quote bundles and renewals
- Separate suppliers for accessories
- Less flexible fulfilment for mixed baskets
- More admin for repeat trade orders
Why choose us
Procurement that feels fast, clear and trade-ready.
Every product page is designed to help you move from shortlist to checkout with fewer unknowns.
Verified buyer feedback
Trusted by installers, resellers and IT teams.
CLI Secure helped us confirm the right supporting accessories and saved us a return. Good trade service.
Keith D.Reliable fulfilment for security hardware and renewals. The team understands what business buyers need.
Rania M.Common questions
Product and order FAQs
Can I request trade or bulk pricing?
Yes. For multi-unit, reseller or project orders, contact CLI Secure and our team can review the basket for trade pricing.
How quickly can this be delivered?
Available delivery options are shown at checkout. Many in-stock products support next-day or timed UK delivery.
Can you help confirm compatibility?
Yes. Share the existing setup, model numbers or project requirement and we can help confirm suitable hardware, licences or accessories.
Do you supply renewals and supporting accessories?
CLI Secure supplies hardware, renewals, licences and related accessories across networking, CCTV, VoIP and IT support categories.





