like the tpmr function is an ethernet repeater relay function with some limited link level oam capability that allows relaying the link level oam failure detection to the closest ethernet switches tpmr is based on ieee 802 1aj standard the sfp nid requires some management and configuration this configuration may be stored in rom or flash on the sfp nid or it may be done via in band or out of band management such as via a management vlan or via i2c two wire electrical interface it should be possible for in band and out of band management to read and write to the rom or flash memory and or to communicate with the soc in the sfp nid fig1 shows the out of band management channel via i2c interface which is one of the electrical interfaces it also shows the in band management channel which is via the fiber optics interface and may use management vlan mac address ip address and the like sfp nid should be able to do a full complete reset or warm or cold booting by in band or out of band commands this causes the sfp nid to execute new configuration and or software stored on the rom flash sfp nid may also integrate other functions that exist today inside an sfp in the nid soc to reduce the power cost and footprint for example these functions may include integrating temperature measurement serial number model number and other identification current voltage and power measurement diagnostics monitoring functions such as ddm and the like even functions such as dsp pre equalization preamplifier or amplifier may be integrated in the nid soc an sfp nid fits completely inside.