[Repeater-Builder] tone encoder/decoder board

[retiredcss01]

I have an ICOM H-16, VHF HANDHELD.  Our system has changed to 
apparently a DCS tone of 306 and the tones on the H-16 only go to 254.  
My question is, is there any way, add-on or mod, to get this tone for 
encoding and decoding?

Thanks,
Tom
retiredcss01