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 F-MM850-550M-1.25G SFP Fiber Module
Authorised supply
Project support
UK delivery options
High demand this week
18 buyers viewed this product today. Need project pricing? Our team can quote bulk and renewal orders.
£18.48
Excl. VAT
Need multiples?
Volume discounts for installers, MSPs and resellers.
Fast UK fulfilment
Next-day and timed delivery options at checkout.
Price match help
Send us your project list for a sharper trade quote.
Genuine stock
Authorised supply with UK dispatch options.
Expert advice
Pre-sales sizing from security and IT specialists.
**Product Overview**
Grandstream F-**MM850-550M-1.25G** is a multi-mode SFP fiber module, that enables you to have an ultra-fast fiber connectivity in your enterprise-class LAN or WAN. It’s a hot-pluggable small-form factor transceiver module integrated with the high sensitivity PIN receiver and signal conditioner for 1.25 Gigabit Ethernet applications over a maximum transfer distance of 550mtrs.
SFP modules support very low EMI and excellent ESD protection. Featuring low power consumption, this fiber module is ideal for enterprise LAN networks and other optical links.
**Ideal For**
- enterprise LAN networks
- other optical links
**Benefits**
- Available with project-order support
- Compatibility and fulfilment can be confirmed before ordering
| Specification area | Specification | Value |
| --- | --- | --- |
| Connectivity | Ethernet connectivity | Gigabit Ethernet |
| Key Features | Multi-Mode | Supported |
| Key Features | 850nm Wave-Length | Supported |
| Key Features | 0.55-Kilometer | Supported |
| Key Features | 1.25Gbps | Supported |
| Key Features | Please select the fiber cable according to the module type. The multi-mode module corresponds to the multi-mode fiber, and the single-mode module corresponds to the single-mode fiber. | Supported |
| Key Features | Please select the same wavelength fiber cable for connection. | Supported |
| Key Features | Please select an appropriate fiber module according to the actual networking situation to meet different transmission distance requirements. | Supported |
| Key Features | The laser of the Class 1 Laser Product is harmful to eyes. Do not look directly at the fiber connectors. | Supported |
Shipping
Next Day Delivery
For UK orders received before 1pm Monday to Friday, we operate a next business day delivery service, subject to availability. We use next day services from the leading delivery companies.
Specific Time Delivery
If you need an item urgently, or delivered at a specific time, please contact us.
Delivery Methods
We use several leading delivery companies. The majority of our deliveries are made by DPD, including most international orders.
Shipping prices are calculated during the checkout process. We deliver to almost every country. For international delivery services, we use DHL, a high quality, fast delivery service. Prices are provided based on the weight of the order; this is calculated when you reach the checkout.
For full shipping information please visit our shipping page.
Grandstream F-MM850-550M-1.25G SFP Fiber Module
£18.48
Excl. VAT
· In stock for trade orders
Trade pricing availableNext-day UK dispatchAuthorised supplyProject quote supportSecure checkoutExpert pre-sales advice
Trusted by trade buyers
★★★★★
4.9 / 5 from 120+ verified reviews
WG
Wesley G
★★★★★
"CLI Secure has been our go-to for Fortinet hardware and renewals. Fast delivery and knowledgeable support every time."
KD
Keith D
★★★★★
"We ordered Grandstream phones for a full office rollout. The trade pricing and next-day delivery saved us both time and budget."
RM
Rania M
★★★★★
"Very professional IT networking supplier. Their pre-sales team helped us spec the right firewall for a multi-site deployment."
JT
James T
★★★★★
"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.
1Check compatibility
2Choose fulfilment
3Deploy with support
Trade quote ready
Send your basket for quantity pricing and project supply checks.
Same basket support
Add licences, mounts, switches, storage or accessories with confidence.
Need fit advice?
Ask before checkout and avoid wrong-spec purchases.
Better buying value
Why trade buyers choose CLI Secure
CLI Secure
Best for projects
- Trade and bulk pricing support
- Compatibility advice before purchase
- UK delivery options and account support
- Hardware, renewals and accessories in one place
Generic marketplace
Low context
- Limited project advice
- Unclear warranty or channel source
- Harder to quote bundles and renewals
Buying direct
Slower procurement
- 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.
Authorised supply
Source genuine stock from known B2B channels.
Project help
Ask for fit checks, renewal advice and quantity pricing.
Fast dispatch
Choose UK delivery options for urgent deployments.
Secure checkout
Order online or speak to the team for larger baskets.
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.Complete the basket
Related products for this project
In stock
Grandstream GCC6011 Unified Communications & Networking Convergence System
Trade support
UK dispatch
£260.26
Excl. VAT
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.