[asterisk-users] Anyone seen this before

[David Backeberg]

On Mon, Nov 2, 2009 at 4:26 PM, Robert Grignon <rgrignon at fleetone.com> wrote:
> Testing a new gateway and have a Rhino Channel Bank... Sending a test fax
> and everything works fine (Receive the fax fine) But I notice this in the
> log....
>
> Google search didn't return much of anything...
>
>
> DAHDI hook failed returned -1 (trying 1): Device or resource busy

I've never used the channel bank, but different types of phones do
different things to signal a hangup, including perhaps temporarily
reversing polarity. Whichever way your card is configured to detect
hangups, try switching the line signaling and see if that fixes your
problems.