[6.3/Asterisk + Zaptel] Unloading module for upgrade?

[Wojciech Puchar]

> # kldunload -f zaptel
> kldunload: can't unload file: Device busy
> =========
> Dec 20 14:21:39 freebsd kernel: kldunload: attempt to unload file that
> was loaded by the kernel
> =========
> What is the right way to upgrade Zaptel, without rebooting the host?

please stop asterisk first to be able to reload zaptel.
you can't unload used module!