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 HA100 High Availability Controller for UCM6510
- High availability controller for two UCM6510 IP PBX systems
- Automatic failover switching to standby PBX
- Continuous system monitoring of both PBX units
- Failover time typically 10–50 seconds depending on endpoint count
- Supports SIP endpoint re-registration via ARP updates
- LED status indicators for system monitoring (up to 14 indicators)
- Controls network, telecom, and system routing during failover
- Designed for mission-critical PBX redundancy
- No manual intervention required for system switch
System Compatibility
- Designed exclusively for Grandstream UCM6510 series
Functionality
- Active/passive high availability setup
- Real-time system monitoring
- Automatic failover and recovery control
Interfaces
- RS-485 connectivity to UCM6510 units
- Network interface ports for monitoring/control
- Status LED indicators
Performance
- Failover time: approx. 10–50 seconds
- Endpoint re-registration via automated MAC/ARP updates
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.





