[Freeswitch-users] freeDTM detect if line is in use

[Moises Silva]

On Tue, Aug 6, 2013 at 11:50 PM, Karl Schmidt <karl at xtronics.com> wrote:

> I want to use a freeDTM fxs to make local calls on a POTS line IF it isn't
> busy - not seeing an
> example of how to test. ( There are some ftdm commands for the fs_cli -
> but I'm not seeing how to
> grab this information for the dialplan.
>
> Has someone else set up a backup line like this?
>

Hello Karl,

You can execute CLI commands (which in FreeSWITCH lingo are called APIs)
from the dialplan using dollar-sign syntax such as:

<condition field="${ftdm_usage(1 1)}" expression="^0$">
</condition>

That checks if span 1 channel 1 has 0 calls. Note there is an inherent
small race between the time you check and the time you try to use the
channel, but that ought to be good enough I think.

*Moises Silva
**Manager, Software Engineering***

msilva at sangoma.com

Sangoma Technologies

100 Renfrew Drive, Suite 100, Markham, ON L3R 9R6 Canada


t.   +1 800 388 2475 (N. America)

t.   +1 905 474 1990 x128

f.   +1 905 474 9223



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