[asterisk]
enabled => yes
dsn => asterisk-connector
username => user
password => pass
pre-connect => yes
pooling => no
limit => 1
idlecheck => 1
negative_connection_cache => 1

idlecheck => 300; ( will check connection in pool every 5 minutes)
connect_timeout => 5; ( how long to wait on reconnect)
negative_connection_cache=>10 ;( how long wait before reconnect)
pre-connect = yes; will allow you check if connection ok by issue "realtime show odbc status"