Ignoring Signalling

Whenever I boot my asterisk system or reload configs, I get the following message in the log (I have a single FXO module - X100P in the system):

Jun 1 20:11:13 WARNING[13263] chan_zap.c: Ignoring signalling

I can’t figure out what is causing this. Can anybody provide any insight?

My zapata.conf looks like:

[trunkgroups]

[channels]

signalling=fxs_ks

language=en
context=from-analog

usecallerid=yes
callerid=asreceived

busydetect=yes
busycount=6

transfer=yes
cancallforward=yes
callreturn=yes

echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
rxgain=3.8
txgain=0.8
channel => 1

and my zaptel.conf contains:

Global data

loadzone = us
defaultzone = us

fxsks=1