The NetVanta Analog Modem Dial Backup Module P/N 1200864L1 may be added to any existing Network Interface Module to provide for remote dial-in management of the NetVanta 3000 and 4305 series routers. If there are no existing NIM modules installed in the chassis the Analog DIM module may be used with the NetVanta DIM Carrier Module P/N 1200877L1. The DIM Carrier Module will slide into the NIM slot on the rear of the chassis and provide the motherboard connection for the DIM module.