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
0 pcs
Back In Stock
Estimated arrival of additional items.
Our order confirmation will provide the final shipping date.
  • ~May 3, 2024
    +9 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

With the FLEXBOX we’re able to use our Transceivers universally in all kind of equipment and reduce the stock keeping significantly. Just awesome!
Christian Seitz Head of Network, STRATO AG
We use “FLEXBOX” and “FLEXOPTIX” for a few years now. Since then life is much easier. And even saved me sometimes in the middle of the night. Need a special vendor or type, plug it in, program, and done. Very… but very occasionally a compatibility is not present in the system. Just drop a e-mail to support with your needs to get an immediate response from “JIRA – the flexoptix robot” and your compatibility is added to your FLEXBOX within 24 hours. Just awesome!!
Nick Derksen Infrastructure Engineer, Previder B.V

What a great product! FLEXBOX is an incredible help to our organisation that has a zoo of vendors and manufacturers in our data center. It is super easy to use and we can rapidly get a transceiver ready for any of our hardware. Q: How to improve the experience of setting up transceivers in a multivendor environment? A: FLEXBOX.

Pavel Sagulenko Head of IT Infrastructure / appliedAI Initiative GmbH

The FLEXBOX allows us to quickly configure our transceivers for every application. No more need to keep transceivers of every type and vendor in stock. Any problems with a transceiver configuration? Thanks to the lightning fast FLEXOPTIX Service Desk you’ll solve every issue as quick as possible.

Robert Niedermair IT Infrastructure Administrator, INTERCABLE AUTOMOTIVE SOLUTIONS S.r.l.