Session establishment for static links in point-to-point protocol

Abstract

A constant access ADSL link, or an equivalent connection from a modem to a central office switch is enabled to establish sessions to individual end stations, such as individual Internet service providers. An in-band signaling channel within the Point-to-Point Protocol session employs a connection establishment and tear down protocol for session establishment and tear down to individual end stations with the end station coupled to the ADSL link. Such session establishment and tear down messages are associated with frames having an HDLC-like address of (hex)FF are terminated locally by the concentration/multiplexing equipment at the central office switch or other equipment provided by the telephone network access provider. As a result the session establishment, the access provider's concentration/multiplexing equipment returns a value other than (hex)FF to be used by the end station coupled to the ADSL link, in the HDLC address field to identify data associated with the particular PPP session. This HDLC address value will only have local significance across the ADSL link between the customer premises equipment and the access provider's concentration/multiplexing equipment. When PPP frames associated with the particular session are received from an ISP, the frames are encapsulated in HDLC-like frames with the HDLC address associated with the session by the access provider's equipment before deliver across the ADSL link.