ModemLPA - Router-modem integration
related papers by Lloyd Wood and colleagues.

previously at Surrey. Now on Sourceforge.

Modem Link Properties Advertisement (ModemLPA) is an idea for routers to share information with connected modems. There is sample code on Sourceforge.

For some context around this, see: Approaches from others in this problem space include radio extensions for PPPoE links, and the Dynamic Link Exchange Protocol (DLEP).

Lloyd Wood