flexfax: Temporarily disable modem answer

[root <root@droopy.com>]

With faxgetty, is there a way to temporarily disable answering?  With
mgetty, I could run a cron job to create the file "/etc/nologin.ttyS1"
and mgetty did not answer as long as that file existed...

I'm not on the mailing list, so please CC my address.

Thanx,
John