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
4-6 weeks after ordering
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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
Type 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
  • Cisco Systems (ex. Linksys) MGBT1 compatible
  • Juniper EX-SFP-1GE-LX compatible
  • MikroTik S-RJ01 compatible
  • Arista Networks SFP-1G-LX compatible
Your vendor / compatibility is missing?

What customers say

We heard about FLEXOPTIX for the quality of its FLEXBOX and optics.
We were able to acquire a FLEXBOX to help out our customers. The quality of the product leaves us speechless. We are immediately going to change optics supplier to FLEXOPTIX. The quality is excellent.

Axel Hauguel CEO / Dyjix
Working with the FLEXOPTIX Transceivers and FLEXBOX is not only uncomplicated but offers us the possibility of working with many vendor types to support the different campus networks. Thanks guys - awesome work.
Brian Masiga Network Engineer, Research and Education Network for Uganda
Our engineers spend a lot of time in data centers connecting switches and routers from different vendors. With the FLEXOPTIX service not only their task gets easier, also the back office doesn't have to have a broad range of optics from different vendors in stock anymore. The days that an engineer stand next to a router with an optic from the wrong vendor are over. With the FLEXOPTIX FLEXBOX the engineer simply reconfigures the optic, and that’s that. As an added benefit with the FLEXBOX there is no need to connect a new cross-connect to a device to see if it is connected on the other side. The measurement option that comes with the FLEXBOX are very handy!
Thomas Verschuren Technical Consultant, IP Visie Networking B.V.

The SFPs easily integrated with our existing network equipment, ensuring cross-vendor compatibility. The build quality is very good.
Connecting to the FLEXBOX with an Android phone took only a few seconds, and configuring the SFPs was a breeze. We really liked the ability to configure multiple SFPs at once. Shipping is incredibly fast. Support is friendly, technical and helpful.

Sebastian Giss System Engineer/