Hola!

Trunks will work both for inbound and outbound if the trunk channel is named the same for both directions. But most of the time asterisk is not configured that way or incorrectly, in the sense that incoming are not matched agains any peer and they come as anonymous. If you can configure asterisk trunks so both inbound and outbound match the same peer, then the trunk buttons will show both types of calls.

If you have a know peer name for inbound and another for outbound, you could create two trunks and see inbound and outbound in their own buttons.

Regarding a2billing users... I am not sure how you handle them, but it won't be too hard to modify autoconfig-butotns-freepbx.sh to read a2billing configurations (probably from a mysql db ? ) and create buttons accordingly. Now, if you wan't to see how many simultaneous calls each user is having, you might want to list them as type=trunk or increase the line display in presence.js to more than two.

Best regards,

As I said before, it is not hard to modify the autoconfig-buttons-freepbx.sh. I do not use a2billing myself, but looking at the tables it uses and doing some guess work you can come up with something like this, that it will probably not work but it will serve as basis, perhaps I did not get the mysql fields exactly right but they will be close:

mysql -EB -u $DBUSER -p$DBPASS -h $DBHOST $DBNAME -e \
    "SELECT name as channel,'extension' as type, regexten as extension, context, \
    accountcode as label  FROM mya2billing.cc_sip_buddies \
    ORDER BY accountcode" | sed '/\*\*/d' | sed 's/: /=/g' | sed '/.*=$/d' | while read LINEA
do
echo $LINEA | sed '/NULL/d' | sed 's/^channel=\(.*\)/\n[\1]/g' | sed 's/^extrachannel/channel/g'
echo $LINEA 
done

Appending something like this to the autoconfig script should output buttons for your sip buddies in a2billing

Best regards,