Juniper has two kinds of Copper SFPs. One (SFP-1GE-T) only does Gigabit. The other one (SFP-1GE-FE-E-T) can also run at 100M and 10M respectively.
The problem is, in the chassis inventory both are identified as SFP-T:
FPC 11 REV 10 750-038489 XXXXXXXX MPCE Type 1 3D
CPU REV 04 711-038484 XXXXXXXX MPCE PMB 2G
MIC 0 REV 27 750-028392 XXXXXXXX 3D 20x 1GE(LAN) SFP
PIC 0 BUILTIN BUILTIN 10x 1GE(LAN) SFP
Xcvr 0 REV 02 740-013111 XXXXXXX SFP-T
Xcvr 1 SX 740-011782 XXXXXXX SFP-SX
Xcvr 2 SX 740-011782 XXXXXXX SFP-SX
Xcvr 3 LX 740-011783 XXXXXXX SFP-LX10
Xcvr 4 REV 02 740-013111 XXXXXXX SFP-T
Xcvr 5 REV 02 740-013111 XXXXXXX SFP-T
Xcvr 6 REV 02 740-013111 XXXXXXX SFP-T
Xcvr 7 REV 02 740-013111 XXXXXXX SFP-T
On insert we see the SFP type in the syslog:
fpc11 MIC(11/0): Link 7 Tri Rate Copper SFP - plugged in.
but except for that I know no way to distinguish these two. And after two years these logs are probably gone and noone knows the type anymore. So, is there another way?