Le mer. 24 juin 2020 à 18:59, Jared Mauch <ja...@puck.nether.net> a écrit : > > > > Many of the optics don’t have a way to disable the laser except via custom > > commands over the i2c. Last I read the SFF MSA there wasn’t a good way to > > do this, and it wasn’t required. > > Correction (somewhat) > > It’s not required for the hardware to implement this. There is a pin as well > as bit you can set via i2c to (maybe) disable things: > > - relevant part of MSA - > 8.10 > > Enhanced Options [Address A0h, Byte 93] > > The Enhanced Options are a one byte field with 8 single bit indicators which > describe the optional digital diagnostic features implemented in the > transceiver. Since transceivers will not necessarily implement all optional > features described in this document, this field allows the host system to > determine which functions are available over the two-wire serial bus. A '1' > indicates that the particular function is implemented in the transceiver. > Bits 3 and 6 of byte 110 (see Table 9-11) allow the user to control the > Rate_Select and TX_Disable functions. If these functions are not implemented, > the bits remain readable and writable, but the transceiver ignores them. > - snip - > > They would either need to have the GPIO wired for this pin on the PCBs and/or > implement disable sets this bit AND the optic would need to honor it.
Thanks Jared. So even with Juniper branded optics, same P/N, I guess not all optics come from the same OEM, hence the "disable" stanza working, or not. _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
