How to enable facilityenable=yes for PRI span in DAHDI config module

I have a PRI span setup with a Digium card. I am trying to sort out some issues with caller id.

Is there some way to add facilityenable=yes to the span config?

From chan_dahdi_groups.conf:

; [span_1]
signalling=pri_cpe
switchtype=national
pridialplan=national
prilocaldialplan=national
group=0
context=from-digital
channel=>1-23

Thanks for any input.

-N