Industrial SFP Serial to IP Converter RS-232 or RS485/422

Industrial & Intelligent Serial to IP (Ethernet) Converter
Use FLEXBOX to configure to almost any vendor
RS-232 or RS-485/422 Selectable with Software
100BASE-FX and/or 1000BASE-X SFP Interface
Applications: P-t-P, P-t-MP, Broadcast
Operating Temperature from -40°C to 85°C
  • Copper
  • 30 m
  • 1.25 G
  • Industrial
  • 100M ETH
  • 1G ETH
  • RS232
  • RS485/422
Part number
In stock
4 pcs

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Flexoptix' T.C12.RS232I low power industrial SFP (Small Form-factor Pluggable) module is a serial interface (RS-232/485/422) to IP (Ethernet) data converter. T.C12.RS232I can be plugged into any Ethernet device with SFP ports that support 100BASE-FX and/or 1000BASE-X. Datarate settings can be easily performed via Web or Telnet access. For security reasons, the web and telnet access offers a write-protection mode using an integrated switch on the SFP module.

Serial data transmission can be estabilshed by UDP or TCP protocols. The SFP module is fully compatible to 3rd-Party COM-Servers. You can use the SFP module for COM Port Extenders and Virtual Serial Ports.


Form Factor SFP
Connector / Polish RJ-45
Interface Copper
Compliance Code Serial
Distance 30 m
Temperature Range -40°C - 85°C
Bandwidth 125 Mbit/s - 1.25 Gbit/s
Digital Diagnostic Management (DDM) not implemented
Power Consumption 0.5 W
Supported Protocols RS-232, RS-485/422, Fast Ethernet, Gigabit Ethernet

Transceiver Configuration with FLEXBOX

It's that easy to use
Insert Transceiver into FLEXBOX
1. Insert Into FLEXBOX
Select and Configure
2. Select And Configure
  • Choose vendor and compatibility
  • Press play
  • Configuration only takes a few seconds
Use with Device
3. Use With Device
  • Use the transceiver in your device. That's it!
  • Need it for another device? - Re-configure it again and again


All trademarks, registered companies & references cited are the sole property of their respective company and are used solely to assist in the identification of products.

  • MSA Standard compatible
  • Arista SFP-1G-LX compatible
  • Cisco Systems (ex. Linksys) MGBT1 compatible
  • Juniper EX-SFP-1GE-LX compatible
  • MikroTik S-RJ01 compatible
  • Arista 3rd_Party SFP-1G-LX compatible
Your vendor / compatibility is missing?

What customers say

Definitely, FLEXOPTIX will be my optics supplier from today. The ability to compatibilize optics across multiple vendors is going to save us from many headaches. The FLEXBOX is a must for any company using optical network equipment.
Miguel Bérniz Chief Technical Officer, GibFibre Ltd

I wanted to take a moment to provide some feedback regarding the on-site programming capabilities of your FLEXOPTIX product. I must say that being able to program SFPs on-site according to our specific requirements has been an incredibly valuable feature for our network infrastructure. The convenience and efficiency it offers have exceeded our expectations.

One of the standout benefits we have experienced is the rapid deployment it enables. Being able to respond quickly to changing network needs without having to wait for orders from different vendors has significantly reduced our deployment time. This has improved our operational efficiency and allowed us to be more agile in meeting our organization's evolving demands.

Moreover, the cost savings we have achieved through on-site programming have been remarkable. By eliminating the need to order pre-configured SFPs from various vendors, we have saved on shipping costs, streamlined our inventory management, and bypassed vendor-specific pricing structures. This flexibility has positively impacted our budgeting and overall equipment expenses.

This is simply a brilliant idea and product! Thank you!

Michal Szarecki IT Engineer/
Great. FLEXBOX does what it says on the tin! - just connect, configure Transceiver and be happy.
James Rice Jump Networks Ltd

The flexbox has been an amazing tool for our fibre infrastructure upgrades as we work with different types and manufacturers of equipment, the ability to configure them on the fly when required makes the process a lot easier!

We were pleasantly surprised by the easy to use interface and the extra's such as the power meter.

The travel pack makes it easy to use it off-site in some of our satellite cabs if needed.

The flexoptix universal transceivers are very easy to configure and we will be ordering these in the future.

Tim Waterham ICT Infrastructure Engineer - Wyre Borough Council