[time-nuts] inexpensive fiber optic distribution

[Mark Sims]

The "personality" for these modules is stored in a bog standard 3.3V 256 byte I2C EEPROM (address 0xA0).  The I2C bus is n the connector.  An Arduino can reprogram that memory.   For the simplest case you just change the vendor ID info.  I think the kilobuck level programmers is just a simple I2C interface with some software that knows what to change.

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>As far as the reprogramming goes (another comment on the list) - I 
understand that is to make the unit have some particular flavor 
SFP-wise.  If you were plugging them into a Cisco switch and all you had 
was ones configured for Juniper switches, then you'd want to do that. At 
the multikilobuck level to do this, you'd need a LOT of them to make it 
worthwhile.