@esoare every kamailio box is aware of fast-pickup. In 4.0 and previous, fast-pickup cookie was created in omnipresence and notify was sent with a direct queue to targeted kamailio boxes. as of 4.1, notify is broadcasted (via amqp) and kamailio boxes will check if they have subscribers for the presence-id and will notify the phones if they have. The fast -pickup cookie is created with known values that can be converted by every kamailio box.
