Simultaneous calls out on specific outgoing route

I saw that you can restrict calls for simultaneous trunk

But if you want to limit the concurrent calls on a specific route out?

I saw that my route out “Office” is described in /etc/asterisk/extensions_additional.conf

[outrt-1] ; Ufficio
exten => _.,1,Macro(user-callerid,LIMIT,EXTERNAL,)
exten => _.
,n,Gosub(sub-record-check,s,1(out,${EXTEN},dontcare))
exten => .,n,ExecIf($[ “${CALLEEACCOUNCODE}” != “” ] ?Set(CDR(accountcode)=${CALLEE_ACCOUNCODE}))
exten => _.
,n,Set(MOHCLASS=${IF($["${MOHCLASS}"=""]?default:${MOHCLASS})})
exten => .,n,Set(NODEST=)
exten => _.
,n,Macro(dialout-trunk,2,${EXTEN},on)
exten => _.*,n,Macro(outisbusy,)

and you can insert a line to prevent more than n simultaneous calls?

You can do this using GROUP_COUNT() function. The file to edit is /etc/asterisk/extensions.conf, but based on your the description. you are using a GUI possible FreepbX, so you should take a look at

wiki.freepbx.org/display/FPG/Out … l+Limiting