Some problems on zaptel.conf?

I write these codes in the zaptel.conf

but it can not run well.when i run modprobe wctdm , it shows
ZT_CHANCONFIG failed on channel 2: Invalid argument (22)
Did you forget that FXS interfaces are configured with FXO signalling
and that FXO interfaces use FXS signalling?
FATAL: Error running install command for wctdm

any ideas? thanks!

dunno since we don’t know your actual config. can’t you run genzaptelconf to do it for you?

what module is connected to channel 2 and to channel 4?