RED and RED/REC Alarm in Zttool

I am setting up my 4th asterisk box with a Quest PRI line and am having a problem.

zttool is blinking both RED/REC and RED alarms.

This is my zaptel.conf config:

defaultzone=us
span=1,0,0,esf,b8zs
bchan=1-23
dchan=24

The turn up engineer tells me that it should be synced off the switch.
Please let me know if I need to provide more information.

change

span=1,0,0,esf,b8zs

to

span=1,1,0,esf,b8zs

the second one indicates that the synch source is the telco clock, not the internal clock.

FYI, this is all covered in the sample config fileā€¦