I think I found a bug in my DIAL distribution. It only affects trunk lines as far as I can tell.

When I added “trunk=yes” to iax.conf file I got an warning message in the CLI:

WARNING[19228]: chan_iax2.c:11128 build_user: Unable to support trunking on user 'iaxclient' without timing

Where ‘iaxclient’ was the context name I was using.

Looking into chan-iax.c I found this:

/* WB6NIL backport stuff */

#define DAHDI_FILE_TIMER "/dev/zap/timer"

#define DAHDI_FILE_PSEUDO "/dev/zap/pseudo”

Since the DIAL distribution does not have “zap” and uses “dahdi” instead, this creates a problem, ultimately resulting in the warning message.

There is also a related message in the asterisk log when you start or restart asterisk:

WARNING[2334] chan_dahdi.c: Unable to open '/dev/dahdi/pseudo': No such file or directory

I changed the source to read "/dev/dahdi/timer" "/dev/dahdi/pseudo" and recompiled asterisk. Now it accepts the trunk parameter without issuing the warning message and the message in the log file is gone (next step – actually getting the trunk to work).

Ken