Optimizing transmitter settings for in-band electrical interface between host device and optical module using out-of-band electrical interface

A first host device governing operation of an optical module, the first host device comprising:

• a transmitter configured to transmit in-band signals on an in-band electrical interface from the first host device to the optical module, wherein the first host device communicates with a second host device over an optical medium via the optical module, wherein the communication with the second host device includes transmission by the optical module of optical signals to the second host device, wherein the second host device is remotely located from the first host device, and wherein the optical signals are generated based on the in-band signals from the first host device;
• an out-of-band electrical interface configured to transmit first out-of-band messages from the first host device to the optical module, and receive second out-of-band messages from the optical module;
• and
• an engine configured i) to transmit via the transmitter one of the in-band signals on the in-band electrical interface to the optical module, ii) to receive feedback from the optical module via the out-of-band electrical interface, the feedback being based on the one of the in-band signals, and iii) to tune the transmitter of the first host device based on the feedback.