Page 40 © 2002, ADTRAN, Inc. 64200600L1#T-31ATotal Access 600R User Interface Guide (UIG)Figure 9. WAN MenuROUTER >CONFIG>WAN>L2 P ROTOCOLDisplays the current L2 protocol. Choices are PPP, F RAME RELAY, and AUTO DETECT. Default is FRAMERELAY.ROUTER >CONFIG>WAN>PPP P ROFILEThe Total Access 600R uses the WAN/PPP profile to specify the profile used when connected using PPP.AuthenticationThe authentication menu contains the required parameters for the authentication of the PPP peer and forbeing authenticated by the PPP peer. Authentication is applied between the Total Access 600R and thePPP peer as follows:TX M ETHODThis parameter specifies how the Total Access 600R is to be authenticated by the PPP peer. There arefour possible selections. Default is PAP, CHAP, or EAP.NONE The connection will not allow the PPP peer to authenticate it.PAP, CHAP, OR EAP The Total Access 600R will ask for EAP during the first PPP LCPnegotiation and allow the PPP peer to negotiate down to CHAP orPAP.CHAP OR EAP The Total Access 600R will ask for EAP during the first PPP LCPnegotiation and allow the PPP peer to negotiate down to CHAP butnot PAP.EAP The Total Access 600R will only allow EAP to be negotiated. If thePPP peer is not capable of doing EAP, then the connection will notsucceed.