That isn't the latest firmware, upgrade is here.
If you question the above, read this.
5855 is a Connectkey product, All Connectkey products are currently EIP 3.5 if their firmware is up to date.
071 firmware was 2.5
072 firmware was 3.0
073 firmware is 3.5
073.XXX.075.34540 is far from up to date though, it is just the last General release, the current latest is here.
Versalink printers are all EIP 3.7 and Altalink is 4.0 (As of todays date)