What is the NovaStar 10G SFP Module-S?
When your fiber run is single-mode, the NovaStar 10G SFP Module-S is the optical transceiver that drops into your NovaStar 10G optical port. It works at 1310 nm on 9/125 µm fiber, and it is the component that takes your link from a few hundred metres to 10 km.
Your chassis does not set that distance; this module does. A CVT10 or CVT4K reaches 300 m or 10 km purely according to which optic sits in its port, which is why the letter appears in the converter’s model name at all.
In practice you are buying a spare. NovaStar populates the optical ports of its single-mode converters at the factory, so your order here is normally a replacement for a failed module, or the shelf spare for a route you cannot afford to be without.
10G SFP Module-S key points
Thirty-three times the reach of the multimode part
Your distance decision gets made at the rack, but it is settled by a component the size of your thumb. This module carries 10 km against the 300 m of its multimode counterpart, on the same port, in the same chassis, at the same data rate.
Single-mode has to be true of the jumpers too
Your buried run being single-mode is only half of it: every short cable in the rack has to match. An LC patch lead from the wrong drawer mates perfectly and passes nothing, which reads on site as a dead module, not a wrong cable. Every fiber between two of these modules is 9/125 µm OS1 or OS2. Colour is a habit, not a guarantee.
A far-end failure that costs a part instead of a chassis
When your converter sits kilometres away, the difference between swapping an optic and swapping a chassis is a lift, a permit and half a day. These modules are hot-swappable in the CVT10, CVT10 Pro and CVT4K optical ports, so your engineer carries the spare in a pocket.
10G SFP Module-S specifications
Your contractor will test a long route against the fiber and loss rows below, so those two lines belong on your cable schedule exactly as they read here.
| Type | Single-mode optical module for a 10G optical port |
|---|---|
| Wavelength | 1310 nm |
| Transmission rate | 9.95 Gbit/s to 11.3 Gbit/s |
| Transmission distance | 10 km |
| Fiber | OS1 or OS2 single-mode twin-core, 9/125 µm core |
| Connector | LC |
| Insertion loss | ≤ 0.3 dB |
| Return loss | ≥ 45 dB |
| Hot swap | Supported in the CVT10, CVT10 Pro and CVT4K optical ports |
That 10 km assumes clean glass between two modules. Patch panels, splices and chambers all draw on the same optical budget, so if your route runs anywhere near that length it deserves a loss test rather than an assumption.
Which devices take a 10G single-mode module
Any NovaStar 10G optical port you are running on the single-mode side of a link takes this module.
| Device | Optical ports | Modules fitted from the factory |
|---|---|---|
| CVT10-S and CVT10 Pro-S | 2 × 10G | Yes, both ports |
| CVT4K-S | 4 × 10G, two working and two backup | Yes, all four |
| VX1000 and VX1000 Pro | 2 × 10G OPT | Offered with a single-mode or a multimode module |
| MCTRL660 Pro | 2 × 10G OPT | Offered with a single-mode or a multimode module, with OS1/OS2 recommended for the single-mode build |
| MX_4 10G Fiber Output Card-S | 4 × 10G SFP+ | Yes, four supplied with the card |
Most of these ship populated, so the last column tells you whether your purchase order needs modules at all. Your usual reason to buy one is a failure or a spares holding, not a gap in the original delivery.
The 5G converters are a different class of optic. If your far end is a CVT8-5GS, it takes a 40G module, not a 10G SFP, and its multimode sibling uses an MPO connector rather than LC.
S or M: what actually decides it
Your choice between S and M is decided by the fiber already in the ground. Nothing about the module, the port or the converter changes that answer, and it is not a performance choice.
You want that from the record rather than by eye. The as-built drawing, meaning the record of what was actually installed, or the label on the fiber itself will say OS1 or OS2 for single-mode and OM3 or OM4 for multimode, and whatever sits at the far end of that same run has to carry the matching letter.
If the installed fiber is multimode, order the 10G SFP Module-M instead. It runs 850 nm on a 50/125 µm core and reaches 300 m, which covers most of what you do inside a single building.
If you are still specifying a new build, your fiber choice comes before the electronics. Single-mode costs you little more to install and leaves the distance question open for the life of the route.
When you need a 10G SFP Module-S
You reach for a 10G SFP Module-S on the links where the far end is hard to get to, and that is exactly what changes what a spare optic is worth to you.
Whichever case you are in, the matching rule does not change. Both ends of one fiber run carry the single-mode part; a multimode module anywhere in your chain behaves like a broken link rather than a slow one.
If the run is multimode, the 10G SFP Module-M is the part to stock. 850 nm on a 50/125 µm core, reaching 300 m.
Where to find the 10G SFP Module-S datasheet, manual or specifications
You will find the 10G SFP Module-S figures inside the CVT10 specification, alongside the multimode build. The wavelength, the 10 km and the 9/125 µm fiber grade are all in there, and they are worth reading before the cable schedule is priced.
NovaStar 10G SFP Module-S FAQ
Is this a fiber converter?
No, this is not a fiber converter, it is the optic that goes inside one. Your converter is the chassis carrying the Ethernet ports and the power inlet.
How far will it reach?
It will reach 10 km at 1310 nm on OS1 or OS2 single-mode fiber, in a NovaStar 10G optical port.
Does a new CVT10-S arrive without modules?
No, a new CVT10-S arrives with both of its optical ports populated from the factory. You buy this one as a replacement or as a spare.
Can it work opposite a Module-M?
No, it cannot work opposite a Module-M. This one is 1310 nm single-mode and the other 850 nm multimode, so the pair cannot form a link. Both of your ends match.
Does it fit a CVT8-5GS?
No, it does not fit a CVT8-5GS. That converter runs a 40G optical module, which is a different class of transceiver from a 10G SFP.
Can it be replaced without powering the converter down?
Yes, you can replace it with the converter live. NovaStar documents the optical modules in the CVT10, CVT10 Pro and CVT4K ports as hot-swappable.
What fiber does it need?
It needs OS1 or OS2 single-mode twin-core fiber with a 9/125 µm core on LC connectors, with insertion loss of 0.3 dB or better.
Why does a shorter run still need single-mode?
A shorter run still needs single-mode because the fiber decides, not the distance. If your 200 m route was already pulled in single-mode, it takes single-mode optics at both ends.
What warranty covers a 10G SFP Module-S?
Your 10G SFP Module-S carries three years of serial-tracked manufacturer coverage, because these come through our authorized US NovaStar channel.
Can I get volume pricing or Net 30 terms?
Yes. Send us the quantity you want to hold and volume pricing applies from there. Purchase orders and Net 30 terms may be available for approved schools, government buyers, venues and established integrators.
How do I order a 10G SFP Module-S?
You order a 10G SFP Module-S at the listed price, which is per module. Have your host device model and the fiber record to hand, since those confirm the letter. Orders placed before 3 PM ET on in-stock items ship the same business day. Contact us to confirm current availability.
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