Запрос к СУБД из dialplan-a

правильно смотрите func_odbc.conf

там есть примеры вобщемто.

; ODBC_PRESENCE - Retrieve and update presence [PRESENCE] dsn=mysql1 read=SELECT location FROM presence WHERE id='${SQL_ESC(${ARG1})}' write=UPDATE presence SET location='${SQL_ESC(${VAL1})}' WHERE id='${SQL_ESC(${ARG1})}' ;prefix=OFFICE ; Changes this function from ODBC_PRESENCE to OFFICE_PRESENCE ;escapecommas=no ; Normally, commas within a field are escaped such that each ; field may be separated into individual variables with ARRAY. ; This option turns that behavior off [default=yes]. 

вот для примера с PRESENCE вызов будет вот так

exten=> s,1,Set(presence=${ODBC_PRESENCE(11111)})