Patent ID: 6178173
Filing Date: 2001-01-23
Classification: H04L,H04Q

Abstract:
A method for communicating pre-connect information between a calling endpoint and a called endpoint in an integrated services digital network (ISDN) system, comprising the steps of:dialing the called endpoint;setting a calling party subaddress information element to a value that allows the contents of a subaddress information field to be user specified;specifying the contents of the subaddress information field to specify a reason for the calling party dialing the called endpoint;transmitting a message of information to the called endpoint, the message of information including the calling party subaddress information element and the subaddress information field;receiving the message of information at the called endpoint;comparing the reason the calling party dialed the called endpoint to a database of calling reasons;transmitting a connect message from the called endpoint to the calling party, if the reason the calling party dialed the called endpoint corresponds to at least one of the calling reasons; andtransmitting a release complete message from the called endpoint to the calling party, if the reason the calling party dialed the called endpoint does not correspond to at least one of the calling reasons.