(2014-08013)So maybe EX switches require juniper coding in the tranceivers, maybe they don't. Internet suggests people are actively using some of them. (Link)Command to find out what is installed:
show chassis hardware
My results:
Vendor
Part
EX sees it as:
Finisar
FTRJ-8519A7D-2.5
UNKNOWN
Finisar
FTRJ8519P1WNL-SU
NON-JNPR/SFP-SX
Dell
FTRJ8519P1WNL-SU
NON-JNPR/SFP-LX10
Cisco
GLC-SX-MM
NON-JNPR/SFP-SX
Cisco
GLC-LH-SM
NON-JNPR/SFP-LX10
Whether or not they actually work is unknown right now.
This is a collection of techical information, much of it learned the hard way. Consider it a lab book or a /info directory. I doubt much of it will be of use to anyone else.