[Freeswitch-users] Callers are put into queue although there are free phones

[Fahrwerk Kurierkollektiv (Technik)]

Hey,

we're running a freeswitch instance in our small company on a Linux HA 
Cluster under Debian. Since we are a bicycle messenger company, a 
correctly working telephone system is absolutely crucial.
We use a total of four SNOM Phones (300 series), two of which are 
"incoming" for calling customers and the remaining two are used to 
communicate with our couriers, e.g. in case that the radio doesn't work.

Of lately, some customers reported to us, that they have been put into 
our queue for more than 10 minutes until they hang up. A normal call 
from or to a customer is not longer than 4 minutes and in most cases we 
are sure that there was absolutely no reason to put the person into the 
queue because both phones were free at the time of calling.

A collegue of mine proposed that it might have to do something with the 
following advice taken from the wiki:

  "If calls are not properly ended by freeswitch after the phone has
   hung up, check if the BYE messages sent by the phone are
   authenticated. (containing a proxy-authentication line) If not, you
   can work around this by adding <param name="auth-all-packets"
   value="false"/> to the sip-profile."

http://wiki.freeswitch.org/wiki/Interop_List#SNOM_190.2C_snom300_series.2C_snom800_series.2C_snomMP.2C_snomM9.2C_snomPA1
(The callers number is 493027574754)

I have posted a freeswitch log to pastebin of one confirmed call where 
the customer was put into queue although none of the phones was occupied:
http://pastebin.com/NdVZ9DdS

Also here's how we set up our queue, which is fairly simple I guess:
http://pastebin.com/sGNBmk2d

I can, of course, provide more configuration snippets and so on, if 
requested and hope that you can help us fix the problem :)

Greets,
Markus