ADC 600F Manuel D’Utilisation

System mode indicates the mode of operation between the modem and the service provider 
for WAN sessions. The only model capable of selecting between system modes is the Megabit 
Modem 700F. It can operate in either Bridge/Router RFC 1483 or PPP over ATM mode. It can 
not operate in both modes simultaneously. The Megabit Modem 400F operates only in 
Bridge/Router RFC 1483 mode, while the Megabit Modem 500L and 600F operate only in PPP 
over ATM mode. This section provides procedures to select the system mode. Then, use the 
section 

“Saving the Configuration” on page 28

 to effect the system mode of operation.

All sessions that occur simultaneously must be the same system mode: either 

 

or

. Your service provider will indicate which system mode you can use. 

See the 

“System Mode Worksheet” on page 108

 for the system mode that you recorded.

Point-to-Point Protocol (PPP) over ATM is connection-oriented where the session has to be 
established between the modem and the service provider before data transmission begins. 
Bridge/Router RFC 1483 does not establish a session. This mode switches packets based on the 
data link-layer address for bridging or on the network-layer address for routing.