While the componentry such as chipsets, TOSA, ROSA and BOSA are made in Japan,  USA and China, the manufacturing and assembly of optical transceivers takes place to a large degree in China. Manufacturing in China no longer means low quality and low cost. Today it means high quality and high standards of optical engineering.

TXO Optics has selected manufacturing partners in China with whom we have a long-term relationship. We regularly visit our partners to audit their facilities, meet face-to-face to review ongoing projects and discuss future work.  We are transparent about the names of our primary partners and will share details with our customers on request.

For some providers of optical transceivers the story ends here. In other words, they simply re-badge or re-label the optical transceiver having purchased it from the factory where they are made and dispatch it to the customer. For TXO Optics, this is the starting point.


TXO Optics adds value in the following ways:


EEPROM codes

TXO Optics has a database of codes required to deliver functionality across a very large range of devices. In addition TXO has the equipment and expertise necessary to read/write codes to the EEPROM and then test to check for compatibility in our testing lab.


Compatibility testing

We test the transceiver to see that not only is it accepted by the host system but that it displays electronically exactly as expected. This means that when the network management system is interrogated to show transceiver properties we can see the appropriate wavelength, type, part code, vendor name as well as DOM information and functionality. All of which is vitally important to the telco in order to manage the network remotely. Where required the transceiver is re-programmed in our lab to ensure that all relevant parameters are displayed


Insertion and Extraction testing

For some customers we measure the amount of force required  to insert/extract the optic from the port over repeated cycles using a Newton Meter.


Functionality testing

Our functionality tests encompass testing the transmit power of the laser (Tx) as well as the receive sensitivity (Rx) to ensure they hit the parameters  called for by the datasheet. We also confirm that the specified distance will be delivered either by means of physical fibre spool to 120km or by means of a variable attenuation and power meter.


Additional transmission tests

We carry out BERT or RFC 2544 testing to check for packet loss over an elongated period of time for example 12 or 24 hours with maximum attenuation, depending on requirements. TXO Optics relies on various EXFO testing instruments including EXFO’s specialist transceiver testing tool-kit which is called iOptics. This is a standalone package that runs on the FTB-890NGE module on the EXFO FTB tester.



TXO’s customers are located all over the world and we routinely manage the processing of orders and dispatch to a diverse range of countries. We also have physical presence in the UK (Chepstow), Spain (Madrid), USA (Baltimore), Brazil (Londrina) and a registered company in Australia.