How to enable full 802.3bt power on 7150-C10ZP ports?

[Greg_WiGuy]

We have a couple of these deployed supporting the R760 which is uplinked at 2.5Gbps.  Currently all APs are reporting that they are only connected to a 802.3at capable switch.  The datasheet for the ICX 7150 states that the 7150-C10ZP has 4x 802.3bt ready ports but I cant find any documents that get into the specifics for the 7150-C10ZP.

Which ports support 802.3bt and how do I enable it?

Power Capacity: Total is 240000 mWatts. Current Free is 92340 mWatts.

Power Allocations: Requests Honored 10 times

Port Admin Oper ---Power(mWatts)--- PD Type PD Class Pri Fault/
State State Consumed Allocated Error
-----------------------------------------------------------------------------
1/1/1 On On 11400 29532 2P-IEEE Class 4 3 n/a
1/1/2 On On 11600 29532 2P-IEEE Class 4 3 n/a
1/1/3 On On 11000 29532 2P-IEEE Class 4 3 n/a
1/1/4 On On 11400 29532 2P-IEEE Class 4 3 n/a
1/1/5 On On 12600 29532 2P-IEEE Class 4 3 n/a
1/1/6 On Off 0 0 n/a n/a 3 n/a
1/1/7 On Off 0 0 n/a n/a 3 n/a
1/1/8 On Off 0 0 n/a n/a 3 n/a
1/2/1 On Off 0 0 n/a n/a 3 n/a
1/2/2 On Off 0 0 n/a n/a 3 n/a
-----------------------------------------------------------------------------
Total 58000 147660

When I try to set the inline power by class on any port, I get the following.  It's as if the switch doesn't support going past 802.3at power.

config-if-e1000-1/1/1)#inline power power-by-class 5
PoE Error: Please specify the class number in the range 1..4