Abstract: A methodology for allowing the transmission of a facsimile message to a specified location on a multi-user computer network consists of modifying a portion of the handshake data fields transmitted in conjunction with the facsimile images. The data field is modified to accept sender-entered data, typically a recipient-specific identification code. The receiving facility obtains the data as part of the handshake procedure, and utilizes the identification code to effect routing of the message to the intended recipient. The data field utilized is preferably the Transmit Terminal Identifier field of the handshake transmission.